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Custom PCB Prototyping using a Laser Cutter
this switch diagram looks incorrect. negatives should be separate and connected . centre should go to radio. either side go to alternate power source.
Yeah Ive considered it. There are venturi products out for high prices. I just wanted to make something where I can add a mesured amount of fertilizer for a watering session.My concern with a diy venturi is the back pressure may be to high and water goes the wrong way through the fertilizer line. Benifit is obviously a bulk volume can be connected for many watering sessions, disadvantage is the complexity and ability to DIY.I had considered an arduino dosing pump into mixing resivour. But this build only took a couple hrs and works great.
Yeah im excited to see how my plants respond. My soil is very sandy, so this method should help allot.
FertigationView Instructable »