3 ms·
No worries. PIs do have GPIO pins, and lots of peripherals to plug into them. Nearly Adafruit’s whole product line is about hooking up random peripherals to I/O
by wrs 7y ago
No worries. PIs do have GPIO pins, and lots of peripherals to plug into them. Nearly Adafruit’s whole product line is about hooking up random peripherals to I/O pins.
And speaking of custom household devices, I’m about to spend $30 or so at Adafruit to build a thing that texts my wife when her outdoor herb pots need watering. :)
- cmpb 7y agoThat sounds fun! I've been rebuilding my wife's gardens and adding drip lines / irrigation. I ended up getting an OpenSprinkerPi[1] board to control the irrigation valves I'm installing. There's also a software project[2] that gives it a little more configurability/utility, including tying it into automatic watering based on the weather and such. I'm just having a lot of fun with it, and it seems like you are too! [1]https://rayshobby.net/wordpress/ospi/ https://rayshobby.net/wordpress/ospi/ [2]https://github.com/rszimm/sprinklers_pi https://github.com/rszimm/sprinklers_pi
- gsich 7y agoPay more for the humidity sensor. Not the resistive ones, they fail after a short time.
- HeyLaughingBoy 7y agoI'll go a step further. Don't pay for any sensor, you can make your own resistive sensor from a couple of resistors. The reason they fail is oxidation on one terminal. If you alternate the polarity as you read the sensor, it avoids that problem.
- wrs 7y agoAdafruit has a cheap capacitive sensor (using a micro controller with built in touch sensor circuitry) — but not that cheap. The polarity flip is a clever idea. Well, part of the fun is wildly over-engineering the thing, right?
- gsich 7y agoYes, but lifetime is still not the best.
- jamiek88 7y agoDo you have any guide to this you’ve seen or can recommend?
- HeyLaughingBoy 7y agoNope. I just did it once. I'll look around and see if I drew up a schematic.