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The Raspberry Pi Education Manual

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Re: The Raspberry Pi Education Manual

#2

Post by StavrosK »

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...

Re: The Raspberry Pi Education Manual

#5

Post by Maxious »

yarrel wrote: post #4

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.

Re: The Raspberry Pi Education Manual

#7

Post by Zuph »

StavrosK wrote: post #2

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!

Re: The Raspberry Pi Education Manual

#8

Post by StavrosK »

Zuph wrote: post #7
StavrosK wrote: post #2

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.
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