3 ms·
> and 30 cheap soil sensors for around another $20. Where do you get them?
by skinkestek 5y ago
> and 30 cheap soil sensors for around another $20.
Where do you get them?
- sokoloff 5y agoAliExpress or anywhere else cheap electronics components are sold. (Haven’t looked, but I’ll bet dx, taobao, banggood, and the others also all have them. Amazon and EBay are often faster and cheap-enough now that ePacket has been nerfed. Search something like “soil sensor 10pcs”; looks like they’re $12-13 for 10 there.) They’re cheap to make (basically just a small PCB with a few passives and a connector) and while they don’t last a long time in some soils, they’ll last long enough for you to learn what you want and then decide if you want to change sensors every year or three, go higher quality, or find another way to estimate evapotranspiration and water based on open loop control and monitoring (which is what most people likely end up doing, either technically or by human approximation). If you (or anyone else) is in, or willing to go to, the edge of Cambridge, MA, I’ll set a couple aside for you for free.