• ​UNI-T UT136B Multimeters ($16.56 each)
• ​JDS2023 Handheld oscilloscope ($113 + battery)
• ​Eagle CAD Schematic/Layout ($0)
• ​Ferrule Crimper Ferrule Crimper, to elimiante problems caused by stray wire strands ($23.99)
• ​http://www.ctr-electronics.com/ferrule-20-awg.html 20 AWG Ferrules, as above. $3.99/20 pcs
• ​http://www.ctr-electronics.com/cabling/connectors/ferrule-18-awg.html 18 AWG Ferrules, as above, $3.99/20 pcs
• ​http://www.hansenhobbies.com/products/connectors/tools/crimp_dx/ Crimper for building PWM cables, Micro-Fit Encoder cables, etc ($39.95)