Gardening

The latest DIY ideas, techniques and tools for hacking nature from plant grafting to building gardening tools and sprinklers.

Irrigating Your Garden With an Op Amp

Irrigating Your Garden With an Op Amp

Instructables user diy_bloke built this op-amp controlled pump for his garden, using the classic 741 operational amplifier. He wrote a very detailed how-to including showing how to etch a PCB, as well as how to make a humidity sensor out of gypsum: The simplest form of a soil humidity sensor is made from two galvanized […]