Using simple (arduino) sensors in the GPIO bus - Raspberry Pi Forums

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hi all,
cross-post beginners, got no answers there (and post has fallen of front page) i'll try here, seems more relevant context. should discussion yield results, i'll link in other thread posterity.

i'm building remote control framework pi , need connect number of sensors in gpio pins on board.
following nice:
https://dx.com/p/high-sensitivity-ir-re ... ino-152264
https://dx.com/p/vibration-switch-senso ... ino-150406
https://dx.com/p/arduino-compatible-3-p ... red-144386

of these built powered @ 5v (some of them work @ 3, vibration switch)

understand it, gpio pins rated 3.3v, except ones powering stuff.

question is: possible use 5v sensors on pi's gpio pins, without resorting intermediary boards? kind of electronics need build purpose?

imagine many wondering why won't use either arduino or intermediary arduino-compatible boards in first place. reason cost. goal of project add bunch of sensors internet via easy-to-use extensible framework. want add many of these units around house , form factor , cost key here. why not arduino programming web-capable extensible system in c beyond capabilities.

help! if working, i'll post results , source code y'all.

if feed sensor outputs pi , potentially greater 3.3v use voltage divider reduce voltage 3.3v. it's pair of resistors. resistor divider.


raspberrypi



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