Open-source testing platform capable of performing Nitrate Reductase Nitrate-Nitrogen Analysis Method. This allows you test for nitrates in water, soil, etc.
Arduino compatible - read the tests on your Android device. For BOM, electronics and instructions please use resource link #1.
This is a screw gauge for metric screws. from M3 to M22 and length measure up to 60mm for cylinder head and countersunk screws.
Print as fine as possible. You can dye the embossed numbers and lines with a contrast color.
Uses Write.scad (...
A simple bar for the bathroom to hold razor shaving and tooth brushes