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The Raspberry Pi Education Manual

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60 pointsprocyon14 comments

I recently discovered you can use the pins on the Raspberry Pi to programmatically toggle switches! As a software guy, I find that magical. I ordered a cheap 8-relay board [1], and I'll hook some stuff up to it and turn my house devices on and off via the internet!

[1] http://dx.com/p/8-channel-5v-relay-module-extension-board-fo...

Not to burst your bubble, but Raspberry Pi IO pins operate at 3.3 volts, and the board you linked requires 5 volt logic inputs. It might still work, since there are no specs available for the transistor on the board, but don't count on it!

The Raspberry Pi provides a 5V out pin at ~ 300 mA, so it should work, if the transistor works at 3.3V. Also, someone has tried it, and it worked. I just hope it's the same board.

FYI, It's ok to output at 3v3 volts to a 5v device if the device will still work, but don't read input from a 5v device or you might damage your Pi; the pins are wired directly to the Broadcom chip with no resistance.

Oh, indeed, thank you. I don't have anything to read at the moment, but I'll keep it in mind!

Original announcement: http://www.raspberrypi.org/archives/2965

PDF: http://downloads.raspberrypi.org/Raspberry_Pi_Education_Manu...

See http://www.cl.cam.ac.uk/freshers/raspberrypi/tutorials/os/ for some really good tutorials for making a toy OS from scratch on your Raspberry Pi.

It's under a NonCommercial license.

So not an Open Educational Resource.

See http://wiki.creativecommons.org/4.0/NonCommercial especially "NC Proposal No. 9: Create a new CC license, NC-EDU, that prohibits non-commercial uses, but allows educational uses" for further discussion of this issue.

ewwww, PDF

Maybe I'm one of the only ones that don't mind pdf's? Easy to drag onto my kindle for reading on the bus.

Please feel free to rewrite it in the format of your choice and take the effort to distribute it to everyone. We'll happily wait.

I'm completely serious when I ask this, but would it be legal? I'm currently unable to load the page so I don't know what it's licensed under.

I would assume yes, but I'm not familiar with the Creative Commons License, as noted on page 2 of the PDF:

"This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License."

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