* [http://www.gearbest.com/multimeters-fitting/pp_278738.html UNI-T UT136B] Multimeters ($16.56 each)
* [https://www.aliexpress.com/item/DHL-Free-Jinhan-JDS2023-Handheld-Oscilloscope-1-Channels-20MHz-oscilloscope-JDS2023-200MSa-s-16-bit-true/32804792194.html JDS2023] Handheld oscilloscope ($113 + battery)
* [https://www.element14.com/community/community/stem-academy/blog/2016/07/21/eagle-software-now-available-free-to-students-and-educators Eagle CAD] !Schematic/Layout ($0)
* [http://www.ctr-electronics.com/cabling/tools/weidmuller-ferrule-crimper.html Ferrule Crimper] Ferrule Crimper, to eliminate problems caused by stray wire strands ($23.99)
* [http://www.ctr-electronics.com/ferrule-20-awg.html 20 AWG Ferrules] 20 AWG Ferrules, as above. $3.99/20 pcs
* [http://www.ctr-electronics.com/cabling/connectors/ferrule-18-awg.html 18 AWG Ferrules] 18 AWG Ferrules, as above, $3.99/20 pcs
* [http://www.hansenhobbies.com/products/connectors/tools/crimp_dx/  PWM Crimper] Crimper for building PWM cables, Micro-Fit Encoder cables, etc ($39.95)
* [http://www.techni-tool.com/812IR7874 Desoldering Tool] Weller desoldering tool. $25.60 ($6 shipped from [https://www.amazon.com/OMorc-Desoldering-Solder-Length-Sucker/dp/B01I14V4X8 amazon] and $2-5 from [https://www.banggood.com/search/desoldering.html banggood])
* [https://www.batterysharks.com/12-Volt-7-Amp-Sealed-Lead-Acid-Battery-p/12v-7ah_b12-7.htm 12V/7AH batteries for Peanut Bots] $14.90 Cheapest price I've found ([https://www.amazon.com/gp/product/B007W4AY94 amazon] has 'em too)