Resources for learning how to build gadgets:

- Adafruit.com (hobby boards & Arduino, parts, example code)
- Sparkfun.com (hobby boards, parts, example code)
- YouTube.com (FarmerBrianTee, AgOpenGPS; )
- Element14.com (instruction on programming the Arduino)
- Arduino.cc (microprocessors, programming language, examples)
- Processing.org (programming for Windows tablet or Android)
- Digikey.com (many electronics parts)
- outFARMING.com (my website)
- Openoffice.org (spreadsheet)
- QGIS.org (mapping)
- Creality Ender 3 (3D printer)
- FreeCAD