* [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)