You might have like 10 different Raspberry Pi controller and a lot of power banks. Here is what you should be careful about and what you should direct the students.
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- #715
- 01 Feb 2018
Check the power banks before the start of the class
I can not stress this enough. Always check the Power Banks are charged. Nothing ruins a class like a drained battery. The students just sit there and do nothing.
Play a game. Guess the source. For how long will the Raspberry Pi work with this Power Bank?
Play a little game with the students in this section. Discuss, that you need two different power sources for our work. But then ask them to find out what is the power consumption of the Raspberry Pi. Let them open a browser and search on the internet. What is the power consumption of the Raspberry Pi is the question?
Here is the question put in another way - For how long would the Raspberry Pi work if it is consuming a maximum power? And by how long we mean in terms of hours?
What they should do is to check the capacity of the Power Bank and the Maximum consumption of the Raspberry Pi. If the Power Bank has a capacity of 6000mAh this means that it could provide a current of 6000mA which is 6A for about 1 hour. Or it could provide 3A for 2 hours. Or 1A for 6 hours. This means that if the Raspberry PI is consuming the maximum of 2A that the power bank could power it for 3 hours. Which is enough for one class.
Again, don't give the answers to the students. Let them try to guess them and calculate them.
Courses and lessons with this Tutorial
This Tutorial is used in the following courses and lessons
Perfect STEM course. Module 1 - Smart Car with Raspberry PI
Disassemble a remote control car. Change the brain of the car with a smart computer like Raspberry Pi. Build a smart device with artificial intelligence that you could control from your phone and that could freely navigate itself in the real world and on the Internet. Use your hands. Develop programs for your robot and your phone. Be curious and invent.
The perfect course lives up to its name. You move through the content, we check it and return feedback to you.
In the end, you should be able to better understand how to program and design smart devices that would make the world a better place. For everybody age 12+, 16+, 21+, 35+, etc. The hardware costs about 150$. It changes through the years so it might take some time for you to find it as Raspberry PI, motor drivers, power banks and h-bridges.. they change. Note that the course was designed to be led by a teacher with a decent knowledge in embedded hardware and software. This, on the other hand should not stop you, if you are curious.
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Power and start the controller
We have two power sources (batteries) - one power source is for the controller, the Raspberry PI, and one power source is for the motors. What is the separation between the power sources and why it exists? Why do we need two power sources? We need the different power sources because there is not enough power otherwise.
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