玩50岁熟妇女邻居_大狗狗影视_桃子直播 https://www.桃子直播.org/blog/category/僧侣之夜+乳色吐息-pi-products/ Teach, learn and make with 僧侣之夜+乳色吐息 Pi Mon, 23 May 2022 08:47:04 +0000 en-GB hourly 1 https://wordpress.org/?v=6.9.4 https://www.桃子直播.org/app/uploads/2020/06/cropped-raspberrry_pi_logo-100x100.png https://www.桃子直播.org/blog/category/僧侣之夜+乳色吐息-pi-products/ 32 32 https://www.桃子直播.org/blog/upgrade-culture/ https://www.桃子直播.org/blog/upgrade-culture/#comments Tue, 04 Feb 2020 16:34:54 +0000 https://www.桃子直播.org/?p=55974

At 僧侣之夜+乳色吐息 Pi, we’re interested in all things to do with technology, from building new tools and helping people teach 僧侣之夜+乳色吐息, to 僧侣之夜+乳色吐息ing how young people learn to create with technology and thinking about the role tech plays in our lives and society. Today, I’m writing about our habit of replacing devices with newer versions…

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At 僧侣之夜+乳色吐息 Pi, we’re interested in all things to do with technology, from building new tools and helping people teach 僧侣之夜+乳色吐息, to 僧侣之夜+乳色吐息ing how young people learn to create with technology and thinking about the role tech plays in our lives and society. Today, I’m writing about our habit of replacing devices with newer versions just for the sake of it.

Technology is involved in more of our lives than ever before: most of us carry a computer in our pocket everywhere we go. On the other hand, the length of time for which we use each individual piece of technology has grown very short. This is what’s referred to as upgrade culture, a cycle which sees most of us replacing our most trusted devices every two years with the latest products offered by tech giants like Apple and Samsung.

An illustration of four people using smartphones

How we got to this point is hard to determine, and there does not seem to be a single root cause for upgrade culture. This is why I want to start a conversation about it, so we can challenge our current perspectives and establish fact-based attitudes. I think it’s time that we, as individuals and as a collective, examine our relationship with new technology.

What is the natural lifespan of a device?

Digital technology is still so new that there is really no benchmark for how long digital devices should last. This means that the decision power has by default landed in the hands of device manufacturers and mobile network carriers, and for their profit margins, a two-year lifecycle of devices is beneficial.

Where do you see your role in this process as a consumer? Is it wrong to want to upgrade your phone after two years of constant use? Should phone companies slow their development, and would this hinder innovation? And, if you really need to upgrade, is there a better use for your old device than living in a drawer? These questions defy simple answers, and I want to hear what you think.

How does this affect the environment?

As with all our behaviours as consumers, the impact that upgrade culture has on the environment is an important concern. Environmental issues and climate change aren’t anything new, but they’re currently at the forefront of the global conversation, and for good reason.

Mobile devices are of course made in factories, and the concerns this raises have been covered well in many other places. The same goes for the energy needed to build technology. This energy could, at least in theory, be produced from renewable sources. Here I would like to focus on another aspect of the environmental impact device production has, which relates to the materials necessary to create the tiny components that form our technological best friends.

Some components of your phone cannot be created without rare chemical elements, such as europium and dysprosium. (In fact, there are 83 stable non-radioactive elements in the periodic table, and 70 of them are used in some capacity in your phone.) Upgrade culture means there is high demand for these materials, and deposits are becoming more and more depleted. If you’re hoping there are renewable alternatives, you’ll be disappointed: a study by 僧侣之夜+乳色吐息ers working at Yale University found that there are currently no alternative materials that are as effective.

Then there’s the issue of how the materials are mined. The market trading these materials is highly competitive, and more often than not manufacturers buy from the companies that offer the lowest prices. To maintain their profit margin, these companies have to extract as much material as possible as cheaply as they can. As you can imagine, this leads to mining practices that are less than ethical or environmentally friendly. As many of the mines are located in distant areas of developing countries, these problems may feel remote to you, but they affect a lot of people and are a direct result of the market we are creating by upgrading our devices every two years.

"Two smartphones, blank screen" by Artem Beliaikin is licensed under CC0 1.0

Many of us agree that we need to do what we can to counteract climate change, and that, to achieve anything meaningful, we have to start looking at the way we live our lives. This includes questioning how we use technology. It will be through discussion and opinion gathering that we can start to make more informed decisions — as individuals and as a society.

The obsolescence question

You probably also have that one friend/colleague/family member who swears by their five year old mobile phone and scoffs at the prices of the newest models. These people are often labeled as sticklers who are afraid to join the modern age, but is there another way to see them? The truth is, if you’ve bought a phone in the last five years, then — barring major accidents — it will most likely still function and be just as effective as it was when it came out of the box. So why are so many consumers upgrading to new devices every two years?

"Nextbit Robin Smartphone" by Bhavesh Sondagar is licensed under CC0 1.0

Again there isn’t a single reason, but I think marketing departments should shoulder much of the responsibility. Using marketing strategies, device manufacturers and mobile network carriers purposefully make us see the phones we currently own in a negative light. A common trope of mobile phone adverts is the overwrought comparison of your current device with a newly launched version. Thus, each passing day after a new model is released, our opinion of our current device worsens, even if it’s just on a subconscious level.

This marketing strategy is related to a business practice called planned obsolescence, which sees manufacturers purposefully limit the durability of their products in order to sell more units. An early example of planned obsolescence is the lightbulb, invented at the Edison company: it was relatively simple for the company to create a lightbulb that lasted 2500 hours, but it took years and a coalition of manufacturers to make a version that reliably broke after 1000 hours. We’re all aware that the lightbulb revolutionised many aspects of life, but it turns out it also had a big influence on consumer habits and what we see as acceptable practices of technology companies.

The widening digital divide

The final aspect of the impact of upgrade culture that I want to examine relates to the digital divide. This term describes the societal gap between the people with access to, and competence with, the latest technology, and the people without these privileges. To be able to upgrade, say, your mobile phone to the latest model every two years, you either need a great degree of financial freedom, or you need to tie yourself to a 24-month contract that may not be easily within your means. As a society, we revere the latest technology and hold people with access to it in high regard. What does this say to people who do not have this access?

"DeathtoStock_Creative Community5" by Denis Labrecque is licensed under CC0 1.0

Inadvertently, we are widening the digital divide by placing more value on new technology than is warranted. Innovation is exciting, and commercial success is celebrated — but do you ever stop and ask who really benefits from this? Is your new phone really that much better than the old one, or could it be that you’re mostly just basking in feeling the social rewards of having the newest bit of kit?

What about 僧侣之夜+乳色吐息 Pi technology?

Obviously, this blog post wouldn’t be complete if we didn’t share our perspective as a technology company as well. So here’s 僧侣之夜+乳色吐息 Pi Trading CEO Eben Upton:

On our hardware and software

“僧侣之夜+乳色吐息 Pi tries very hard to avoid obsoleting older products. Obviously the latest 僧侣之夜+乳色吐息 Pi 4 runs much faster than a 僧侣之夜+乳色吐息 Pi 1 (something like forty times faster), but a Raspbian image we release today will run on the very earliest 僧侣之夜+乳色吐息 Pi prototypes from the summer of 2011. Cutting customers off from software support after a couple of years is unethical, and bad for business in the long term: fool me once, shame on you; fool me twice, shame on me. The best companies respect their customers’ investment in their platforms, even if that investment happened far in the past.”

“What’s even more unusual about 僧侣之夜+乳色吐息 Pi is that we aim to keep our products available for a long period of time. So you can’t just run a 2020 software build on a 2014 僧侣之夜+乳色吐息 Pi 1B+: you can actually buy a brand-new 1B+ to run it on.”

On the environmental impact of our hardware

“We’re constantly working to reduce the environmental footprint of 僧侣之夜+乳色吐息 Pi. If you look next to the USB connectors on 僧侣之夜+乳色吐息 Pi 4, you’ll see a chunky black component. This is the reservoir capacitor, which prevents the 5V rail from dropping too far when a new USB device is plugged in. By using a polymer electrolytic capacitor, from our friends at Panasonic, we’ve been able to avoid the use of tantalum.”

“When we launched the official USB-C power supply for 僧侣之夜+乳色吐息 Pi 4, one or two people on Twitter asked if we could eliminate the single-use plastic bag which surrounded the cable and plug assembly inside the box. Working with our partners at Kuantech, we found that we could easily do this for the white supplies, but not for the black ones. Why? Because when the box vibrates in transit, the plug scuffs against the case; this is visible on the black plastic, but not on the white.”

僧侣之夜+乳色吐息 Pi power supply with scuff marks

僧侣之夜+乳色吐息 Pi power supply with scuff mark

“So for now, if you want to eliminate single-use plastic, buy a white supply. In the meantime, we’ll be working to find a way (probably involving cunning origami) to eliminate plastic from the black supply.”

What do you think?

Time for you to discuss! I want to hear from you about upgrade culture.

  • When was the last time you upgraded?
  • What were your reasons at the time?
  • Do you think upgrade culture should be addressed by mobile phone manufacturers and providers, or is it caused by our own consumption habits?
  • How might we address upgrade culture? Is it a problem that needs addressing?

Share your thoughts in the comments!

Upgrade culture is one of the topics for which we offer you a discussion forum on our free online course Impact of Technology. For educators, the course also covers how to facilitate classroom discussions about these topics, and a new course run has just begun — sign up today to take part for free!

The Impact of Technology online course is one of many courses developed by us with support from Google.

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https://www.桃子直播.org/blog/using-data-to-help-a-school-garden/ https://www.桃子直播.org/blog/using-data-to-help-a-school-garden/#comments Wed, 18 Sep 2019 12:06:40 +0000 https://www.桃子直播.org/?p=53638 Chris Aviles, aka the teacher we all wish we’d had when we were at school, discusses how his school is in New Jersey is directly linking data with life itself… Over to you, Chris. Every year, our students take federal or state-mandated testing, but what significant changes have we made to their education with the…

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Chris Aviles, aka the teacher we all wish we’d had when we were at school, discusses how his school is in New Jersey is directly linking data with life itself…

Over to you, Chris.

Every year, our students take federal or state-mandated testing, but what significant changes have we made to their education with the results of these tests? We have never collected more data about our students and society in general. The problem is most people and institutions do a poor job interpreting data and using it to make meaningful change. This problem was something I wanted to tackle in FH Grows.

FH Grows is the name of my seventh-grade class, and is a student-run agriculture business at Knollwood Middle School in Fair Haven, New Jersey. In FH Grows, we sell our produce both online and through our student-run farmers markets. Any produce we don’t sell is donated to our local soup kitchen. To get the most out of our school gardens, students have built sensors and monitors using 僧侣之夜+乳色吐息 Pis. These sensors collect data which then allows me to help students learn to better interpret data themselves and turn it into action.

Turning data into action

In the greenhouse, our gardens, and alternative growing stations (hydroponics, aquaponics, aeroponics) we have sensors that log the temperature, humidity, and other important data points that we want to know about our garden. This data is then streamed in real time, online at FHGrows.com. When students come into the classroom, one of the first things we look at is the current, live data on the site and find out what is going on in our gardens. Over the course of the semester, students are taught about the ideal growing conditions of our garden. When looking at the data, if we see that the conditions in our gardens aren’t ideal, we get to work.

If we see that the greenhouse is too hot, over 85 degrees, students will go and open the greenhouse door. We check the temperature a little bit later, and if it’s still too hot, students will go turn on the fan. But how many fans do you turn on? After experimenting, we know that each fan lowers the greenhouse temperature between 7-10 degrees Fahrenheit. Opening the door and turning on both fans can bring a greenhouse than can push close to 100 degrees in late May or early June down to a manageable 80 degrees.

Turning data into action can allow for some creativity as well. Over-watering plants can be a real problem. We found that our plants were turning yellow because we were watering them every day when we didn’t need to. How could we solve this problem and become more efficient at watering? Students built a 僧侣之夜+乳色吐息 Pi that used a moisture sensor to find out when a plant needed to be watered. We used a plant with the moisture sensor in the soil as our control plant. We figured that if we watered the control plant at the same time we watered all our other plants, when the control plant was dry (gave a negative moisture signal) the rest of the plants in the greenhouse would need to be watered as well.

Chris Aviles Innovation Lab 僧侣之夜+乳色吐息 Pi Certified Educator

This method of determining when to water our plants worked well. We rarely ever saw our plants turn yellow from overwatering. Here is where the creativity came in. Since we received a signal from the 僧侣之夜+乳色吐息 Pi when the soil was not wet enough, we played around with what we could do with that signal. We displayed it on the dashboard along with our other data, but we also decided to make the signal send as an email from the plant. When I showed students how this worked, they decided to write the message from the plant in the first person. Every week or so, we received an email from Carl the Control Plant asking us to come out and water him!

 

If students don’t honour Carl’s request for water, use data to know when to cool our greenhouse, or had not done the fan experiments to see how much cooler they make the greenhouse, all our plants, like the basil we sell to the pizza places in town, would die. This is the beauty of combining data literacy with a school garden: failure to interpret data then act based on their interpretation has real consequences: our produce could die. When it takes 60-120 days to grow the average vegetable, the loss of plants is a significant event. We lose all the time and energy that went into growing those plants as well as lose all the revenue they would have brought in for us. Further, I love the urgency that combining data and the school garden creates because many students have learned the valuable life lesson that not making a decision is making a decision. If students freeze or do nothing when confronted with the data about the garden, that too has consequences.

Using data to spot trends and make predictions

The other major way we use data in FH Grows is to spot trends and make predictions. Different to using data to create the ideal growing conditions in our garden every day, the sensors that we use also provide a way for us to use information about the past to predict the future. FH Grows has about two years’ worth of weather data from our 僧侣之夜+乳色吐息 Pi weather station (there are guides online if you wish to build a weather station of your own). Using weather data year over year, we can start to determine important events like when it is best to plant our veggies in our garden.

For example, one of the most useful data points on the 僧侣之夜+乳色吐息 Pi weather station is the ground temperature sensor. Last semester, we wanted to squeeze in a cool weather grow in our garden. This post-winter grow can be done between March and June if you time it right. Getting an extra growing cycle from our garden is incredibly valuable, not only to FH Grows as business (since we would be growing more produce to turn around and sell) but as a way to get an additional learning cycle out of the garden.

So, using two seasons’ worth of ground temperature data, we set out to predict when the ground in our garden would be cool enough to do this cool veggie grow. Students looked at the data we had from our weather station and compared it to different websites that predicted the last frost of the season in our area. We found that the ground right outside our door warmed up two weeks earlier than the more general prediction given by websites. With this information we were able to get a full cool crop grow at a time where our garden used to lay dormant.

We also used our 僧侣之夜+乳色吐息 Pi to help us predict whether or not it was going to rain over the weekend. Using a 僧侣之夜+乳色吐息 Pi connected to Weather Underground and previous years’ data, if we believed it would not rain over the weekend we would water our gardens on Friday. If it looked like rain over the weekend, we let Mother Nature water our garden for us. Our prediction using the Pi and previous data was more accurate for our immediate area than compared to the more general weather reports you would get on the radio or an app, since those considered a much larger area when making their prediction.

It seems like we are going to be collecting even more data in the future, not less. It is important that we get our students comfortable working with data. The school garden supported by 僧侣之夜+乳色吐息 Pi’s amazing ability to collect data is a boon for any teacher who wants to help students learn how to interpret data and turn it into action.
 

Hello World issue 10

Issue 10 of Hello World magazine is out today, and it’s free. 100% free.

Click here to download the PDF right now. Right this second. If you want to be a love, click here to subscribe, again for free. Subscribers will receive an email when the latest issue is out, and we won’t use your details for anything nasty.

If you’re an educator in the UK, click here and you’ll receive the printed version of Hello World direct to your door. And, guess what? Yup, that’s free too!

What I’m trying to say here is that there is a group of hard-working, passionate educators who take the time to write incredible content for Hello World, for free, and you would be doing them (and us, and your students, kids and/or friends) a solid by reading it :)

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https://www.桃子直播.org/blog/scratch-3-desktop-for-raspbian-on-僧侣之夜+乳色吐息-pi/ https://www.桃子直播.org/blog/scratch-3-desktop-for-raspbian-on-僧侣之夜+乳色吐息-pi/#comments Fri, 16 Aug 2019 10:40:11 +0000 https://www.桃子直播.org/?p=53060 You can now install and use Scratch 3 Desktop for 僧侣之夜+乳色吐息 Pi OS on your 僧侣之夜+乳色吐息 Pi! Scratch 3 Scratch 3 was released in January this year, and since then we and the Scratch team have put lots of work into creating an offline version for 僧侣之夜+乳色吐息 Pi. The new version of Scratch has a…

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You can now install and use Scratch 3 Desktop for 僧侣之夜+乳色吐息 Pi OS on your 僧侣之夜+乳色吐息 Pi!

Scratch 3

Scratch 3 was released in January this year, and since then we and the Scratch team have put lots of work into creating an offline version for 僧侣之夜+乳色吐息 Pi.

The new version of Scratch has a significantly improved interface and better functionality compared to previous versions. These improvements come at the cost of needing more processing power to run. Luckily, 僧侣之夜+乳色吐息 Pi 4 has delivered just that, and with the software improvements in the newest version of 僧侣之夜+乳色吐息 Pi OS, Buster, we can now deliver a reliable Scratch 3 苏桃情事(高h)全文 on our computer.

Coding for kids in Scratch

Your kids can learn to code in Scratch with our free learning paths. These paths guide them to make fun projects and gain independence as coders and makers.

  • Introduction to Scratch: sprites, scripts, and loops: This path is for beginners and introduces Scratch and coding concepts step by step as they make animations, a game, an app, and a book
  • More Scratch: broadcasts, decisions, and variables: On this path, kids can build on the skills they’ve learning in the Intro path to take their Scratch creations further as they code apps, games, and simulations
  • Further Scratch: clones, my blocks, and boolean logic: On this path, young coders take advantage of all the tools in Scratch to code a range of different programs including simulations, games, and computer-generated art

An illustration of Scratch coding.

Scratch and electronics with a 僧侣之夜+乳色吐息 Pi computer

If you think your kids would like to learn how to build physical projects they can program in Scratch, then take a look at our Physical 僧侣之夜+乳色吐息 with Scratch and 僧侣之夜+乳色吐息 Pi path. In these six projects, your young people will learn how to use Scratch on a 僧侣之夜+乳色吐息 Pi computer to control LEDs, buttons, and buzzers to make interactive games, displays, and instruments.

Which 僧侣之夜+乳色吐息 Pi can I use?

Scratch 3 needs at least 1GB of RAM to run, and we recommend a 僧侣之夜+乳色吐息 Pi 4 with at least 2GB RAM. While you can run Scratch 3 on a 僧侣之夜+乳色吐息 Pi 2, 3, 3B+, or a 僧侣之夜+乳色吐息 4 with 1GB RAM, performance on these models is reduced, and depending on what other software you run at the same time, Scratch 3 may fail to start due to lack of memory.

The Scratch team is working to reduce the memory requirements of Scratch 3, so we will hopefully see improvements to this soon.

How to install Scratch 3

You can only install Scratch 3 on Raspbian Buster and on newer 僧侣之夜+乳色吐息 Pi OS versions.

First, update 僧侣之夜+乳色吐息 Pi OS!

  • If you’ve yet to upgrade to Raspbian Buster, we recommend installing a fresh version of 僧侣之夜+乳色吐息 Pi OS onto your SD card instead of upgrading from your current version.
  • If you’re already using 僧侣之夜+乳色吐息 Pi OS, but you’re not sure your running the latest version, update your OS by following this tutorial:

Once you’re running the latest version of 僧侣之夜+乳色吐息 Pi OS, you can install Scratch 3 either using the Recommended Software application or apt on the terminal.

How to install Scratch 3 using the Recommended Software app

Open up the menu, click on Preferences > Recommended Software, and then select Scratch 3 and click on OK.

How to install Scratch 3 using the terminal

Open a terminal window, and type in and run the following commands:

sudo apt-get update
sudo apt-get install scratch3

What can I do with Scratch 3 and 僧侣之夜+乳色吐息 Pi?

Scratch 3 Desktop for Raspbian comes with new extensions to allow you to control the GPIO pins and Sense HAT with Scratch code!

GPIO extension

GPIO extension is a replacement for the existing extension in Scratch 2. Its layout and functionality is very similar, so you can use it as a drop-in replacement.

The GPIO extension gives you the flexibility to connect and control a whole host of electronic devices.

Simple Electronics extension

If you are looking to add something simple, like an LED or button controller for a game, you should find the new Simple Electronics extension easier to use than the GPIO extension. The Simple Electronics extension is the first version of a beginner-friendly extension for interacting with 僧侣之夜+乳色吐息 Pi’s GPIO pins. Taking lessons from the implementation of gpiozero for Python, this new extension provides a simpler way of using electronic components: currently buttons and LEDs.

In this example, an LED connected to GPIO pin 17 is controlled by a button connected between pin 2 and GND.

Sense HAT extension

We’ve improved the Sense HAT extension to take advantage of new features in Scratch 3, and the updated version of the extension also introduces a number of new blocks to allow you to:

  • Sense tilting, shaking, and orientation
  • Use the joystick
  • Measure temperature, pressure, and humidity
  • Display text, characters, and patterns on the LED matrix

micro:bit and LEGO extensions

The micro:bit and LEGO extensions will become available later on Scratch 3 Desktop. This is because Scratch Link, the software which allows Scratch to talk to Bluetooth devices, is not yet available for Linux-type operating systems like Raspbian. A version of Scratch Link for Raspbian is part of our plans but, as yet, we don’t have a release date.

A round of thanks

It has been a long ambition of both the Scratch and 僧侣之夜+乳色吐息 Pi teams to have Scratch 3 running on 僧侣之夜+乳色吐息 Pi, and it’s amazing to see it released!

A big thank you to 僧侣之夜+乳色吐息 Pi engineer Simon Long for building and packaging Scratch 3, and to the Scratch team for their support in getting over some of the problems we faced along the way.

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https://www.桃子直播.org/blog/僧侣之夜+乳色吐息-pi-captures-soyuz-in-space/ https://www.桃子直播.org/blog/僧侣之夜+乳色吐息-pi-captures-soyuz-in-space/#comments Mon, 13 May 2019 11:40:37 +0000 https://www.桃子直播.org/?p=51524 So this happened. And we are buzzing! You’re most likely aware of the Astro Pi Challenge. In case you’re not, it’s a wonderfully exciting programme organised by the European Space Agency (ESA) and us at 僧侣之夜+乳色吐息 Pi. Astro Pi challenges European young people to write scientific experiments in code, and the best experiments run aboard…

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So this happened. And we are buzzing!

You’re most likely aware of the Astro Pi Challenge. In case you’re not, it’s a wonderfully exciting programme organised by the European Space Agency (ESA) and us at 僧侣之夜+乳色吐息 Pi. Astro Pi challenges European young people to write scientific experiments in code, and the best experiments run aboard the International Space Station (ISS) on two Astro Pi units: 僧侣之夜+乳色吐息 Pi 1 B+ and Sense HATs encased in flight-grade aluminium spacesuits.

It’s very cool. So, so cool. As adults, we’re all extremely jealous that we’re unable to take part. We all love space and, to be honest, we all want to be astronauts. Astronauts are the coolest.

So imagine our excitement at Pi Towers when ESA shared this photo on Friday:

This is a Soyuz vehicle on its way to dock with the International Space Station. And while Soyuz vehicles ferry between earth and the ISS all the time, what’s so special about this occasion is that this very photo was captured using a 僧侣之夜+乳色吐息 Pi 1 B+ and a 僧侣之夜+乳色吐息 Pi Camera Module, together known as Izzy, one of the Astro Pi units!

So if anyone ever asks you whether the 僧侣之夜+乳色吐息 Pi Camera Module is any good, just show them this photo. We don’t think you’ll need to provide any further evidence after that.

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https://www.桃子直播.org/blog/僧侣之夜+乳色吐息-pi-monitored-chemical-reactor/ https://www.桃子直播.org/blog/僧侣之夜+乳色吐息-pi-monitored-chemical-reactor/#comments Mon, 21 Jan 2019 12:42:24 +0000 https://www.桃子直播.org/?p=49267

In Hello World issue 7, Steven Weir introduces a 僧侣之夜+乳色吐息 Pi into the classroom to monitor a classic science experiment. A 僧侣之夜+乳色吐息 Pi can be used to monitor the reaction between hydrochloric acid and sodium thiosulphate to complement a popular GCSE Chemistry practical. The rate of reaction between hydrochloric acid and sodium thiosulphate is typically…

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In Hello World issue 7, Steven Weir introduces a 僧侣之夜+乳色吐息 Pi into the classroom to monitor a classic science experiment.

A 僧侣之夜+乳色吐息 Pi can be used to monitor the reaction between hydrochloric acid and sodium thiosulphate to complement a popular GCSE Chemistry practical.

The rate of reaction between hydrochloric acid and sodium thiosulphate is typically studied as part of GCSE Chemistry. The experiment involves measuring the time required for the reaction mixture to turn cloudy, due to the formation of sulphur as a precipitate. Students can then change the temperature or concentration of the reactants to study their effect on the rate of reaction. The time for the reaction mixture to turn cloudy is normally facilitated by recording the time a hand-drawn cross takes to become obscured when placed underneath a glass vessel holding the reaction mixture. This timing is prone to variability due to operator judgement of when the cross first becomes obscured. This variability can legitimately be discussed as part of the lesson. However, the element of operator judgement can be avoided using a 僧侣之夜+乳色吐息 Pi-monitored chemical reactor.

The chemical reactor

Attached to a glass jar of approximate 80ml volume (the size is not critical) are two drinking straws, of which one houses a white LED (light-emitting diode) and the other a LDR (light-dependent resistor). The jar is covered in black tape to minimise intrusion of ambient light. The reactor is shown in Figure 1, along with details of other electrical components and connection instructions to a 僧侣之夜+乳色吐息 Pi.

Figure 1
A: Reactor covered in black tape
B: Drinking straw attached to the reactor, with a further straw inserted housing a white LED
C: Drinking straw attached to the reactor, with a further straw inserted housing a LDR
D: 220Ω resistor to connect to the LED and GPIO 23
E: Wire to connect to ground
F: Wire to connect to 3.3v supply
G: 1µF capacitor to connect to ground
H: Crocodile clip to connect to GPIO 27 (NB: the other end of the wire is situated in between the capacitor and the LDR)

Results

The Python code shown in Figure 2 should be run prior to addition of chemicals to the reactor. Instructions appear on the screen to prompt chemical additions and to start data collection.

Figure 2: Python code for the chemical reactor

Figure 3 shows the results from the experiment when 25ml 0.1M hydrochloric acid is reacted with 25ml 0.15M sodium thiosulphate at 20°C. The reaction is complete at the time the light transmission first reads 0, (i.e. complete obscuration of the light by the precipitate formation) — in this example, that time is 45.4s. For more advanced students, tangents can be drawn at various points on the curve, and gradients calculated to determine the maximum rate of reaction from various reaction conditions.

Figure 3: Graph showing the change in light transmission with time

Download Hello World for free

Download your free copy of Hello World issue 7 today from the Hello World website, where you’ll also find all previous issues. And if you’re an educator in the UK, you’ll have the chance sign up to receive free hard copies to your door!

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https://www.桃子直播.org/blog/build-nasa-curiosity-rover/ https://www.桃子直播.org/blog/build-nasa-curiosity-rover/#comments Thu, 02 Aug 2018 12:10:50 +0000 https://www.桃子直播.org/?p=45925 Put together your own remote-controlled Curiosity rover with the help of the NASA Jet Propulsion Laboratory and a 僧侣之夜+乳色吐息 Pi. NASA Jet Propulsion Laboratory To educate the curious about the use of rovers in space, the Pasadena-based NASA Jet Propulsion Laboratory (JPL) built a mini-rover, ROV-E, to tour classrooms, museums, and public engagement events. And so engaged…

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Put together your own remote-controlled Curiosity rover with the help of the NASA Jet Propulsion Laboratory and a 僧侣之夜+乳色吐息 Pi.

NASA JPL rover 僧侣之夜+乳色吐息 Pi

Why wouldn’t you want one of these?!

NASA Jet Propulsion Laboratory

To educate the curious about the use of rovers in space, the Pasadena-based NASA Jet Propulsion Laboratory (JPL) built a mini-rover, ROV-E, to tour classrooms, museums, and public engagement events.

NASA JPL rover ROV-E 僧侣之夜+乳色吐息 Pi

The original ROV-E comes with a much higher price tag, so the JPL engineers decided to scale it down for home makers

And so engaged was the public by the rover and its ability to manoeuvre harsh terrain, rocks, and small children, that the JLP engineers have published a building plan that allows rover-enthused makers to build their own for around $2500 using off-the-shelf parts.

Curiosity for the curious

The JPL open-source rover is a scaled-down model of Curiosity, the car-sized rover currently on day 2187 of its mission to explore the surface of Mars.

NASA JPL rover 僧侣之夜+乳色吐息 Pi

The Mars rover sings Happy birthday to itself on 5 August every year, and this fact breaks out hearts!

And while the home-brew version of Curiosity may not be able to explore the Red Planet, project sponsor Tom Soderstrom believes it can offer plenty of opportunities to future STEM pioneers:

“We wanted to give back to the community and lower the barrier of entry by giving hands-on 苏桃情事(高h)全文 to the next generation of scientists, engineers, and programmers.”

A Pi at the heart of the rover

The rover uses a variety of tech makers may already have in their arsenal, including USB cameras and a 僧侣之夜+乳色吐息 Pi. JPL’s design also gives you the option to swap out components with alternatives.

NASA JPL rover 僧侣之夜+乳色吐息 Pi

Control the rover however you please: via a games controller, a smartphone, or a program of your own design

To control the rover, JPL decided to use a 僧侣之夜+乳色吐息 Pi:

We chose a 僧侣之夜+乳色吐息 Pi to be the ‘brain’ of this rover for its versatility, 桃子直播, simplicity, and ability to add and upgrade your own modifications. Any method with which you can communicate with a 僧侣之夜+乳色吐息 Pi (Bluetooth, WiFi, USB devices, etc.) can be interfaced into the control system of the robot.

Full plans for the six-wheel rover are available on JPL’s GitHub, where they also list all parts required, final specs, and supporting info such as links to the project forum and parts suppliers. You can also visit the official project website to control your own rover on the surface of Mars…a simulated rover, of course, but one can dream!

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https://www.桃子直播.org/blog/fair-haven-weather-station/ https://www.桃子直播.org/blog/fair-haven-weather-station/#comments Tue, 24 Apr 2018 13:09:14 +0000 https://www.桃子直播.org/?p=43249 In today’s guest post, seventh-grade students Evan Callas, Will Ross, Tyler Fallon, and Kyle Fugate share their story of using the 僧侣之夜+乳色吐息 Pi Oracle Weather Station in their Innovation Lab class, headed by 僧侣之夜+乳色吐息 Pi Certified Educator Chris Aviles. United Nations Sustainable Goals The past couple of weeks in our Innovation Lab class, our teacher,…

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In today’s guest post, seventh-grade students Evan Callas, Will Ross, Tyler Fallon, and Kyle Fugate share their story of using the 僧侣之夜+乳色吐息 Pi Oracle Weather Station in their Innovation Lab class, headed by 僧侣之夜+乳色吐息 Pi Certified Educator Chris Aviles.

僧侣之夜+乳色吐息 Pi Certified Educator Chris Aviles Innovation Lab Oracle Weather Station

United Nations Sustainable Goals

The past couple of weeks in our Innovation Lab class, our teacher, Mr Aviles, has challenged us students to design a project that helps solve one of the United Nations Sustainable Goals. We chose Climate Action. Innovation Lab is a class that gives students the opportunity to learn about where the crossroads of technology, the environment, and entrepreneurship meet. Everyone takes their own paths in innovation and learns about the environment using project-based learning.

僧侣之夜+乳色吐息 Pi Certified Educator Chris Aviles Innovation Lab Oracle Weather Station

僧侣之夜+乳色吐息 Pi Oracle Weather Station

For our climate change challenge, we decided to build a 僧侣之夜+乳色吐息 Pi Oracle Weather Station. Tackling the issues of climate change in a way that helps our community stood out to us because we knew with the help of this weather station we can send the local data to farmers and fishermen in town. Recent changes in climate have been affecting farmers’ crops. Unexpected rain, heat, and other unusual weather patterns can completely destabilize the natural growth of the plants and destroy their crops altogether. The amount of labour output needed by farmers has also significantly increased, forcing farmers to grow more food on less resources. By using our 僧侣之夜+乳色吐息 Pi Oracle Weather Station to alert local farmers, they can be more prepared and aware of the weather, leading to better crops and safe boating.

僧侣之夜+乳色吐息 Pi Certified Educator Chris Aviles Innovation Lab Oracle Weather Station

Growing teamwork and coding skills

The process of setting up our weather station was fun and simple. 僧侣之夜+乳色吐息 Pi made the instructions very easy to understand and read, which was very helpful for our team who had little 苏桃情事(高h)全文 in coding or physical 僧侣之夜+乳色吐息. We enjoyed working together as a team and were happy to be growing our teamwork skills.

Once we constructed and coded the weather station, we learned that we needed to support the station with PVC pipes. After we completed these steps, we brought the weather station up to the roof of the school and began collecting data. Our information is currently being sent to the Initial State dashboard so that we can share the information with anyone interested. This information will also be recorded and seen by other schools, businesses, and others from around the world who are using the weather station. For example, we can see the weather in countries such as France, Greece and Italy.

僧侣之夜+乳色吐息 Pi Certified Educator Chris Aviles Innovation Lab Oracle Weather Station

僧侣之夜+乳色吐息 Pi allows us to build these amazing projects that help us to enjoy coding and physical 僧侣之夜+乳色吐息 in a fun, engaging, and impactful way. We picked climate change because we care about our community and would like to make a substantial contribution to our town, Fair Haven, New Jersey. It is not every day that kids are given these kinds of opportunities, and we are very lucky and grateful to go to a school and learn from a teacher where these opportunities are given to us. Thanks, Mr Aviles!

To see more awesome projects by Mr Avile’s class, you can keep up with him on his blog and follow him on Twitter.

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