Microcontroller ESP32-S2 mini wemos
You can purchase these at roughly $2 each from aliexpress. If you order in bulk the shipping still remains rather low.
Hall Effect Sensors
Clevis Pins & Springs
We use the M3 Clevis pins with the grooved top instead of the hole at the top:
We are upgrading to TPU printed spring system for the V6 OpenMuscle.
Springs are MX Cherry 20 gram keyboard springs: https://www.amazon.com/Stainless-Springs-Gateron-switches-Replacement/dp/B09Q5TQ466/ref=sr_1_1?crid=2CFN5MLN0GW6G&keywords=mx+cherry+20+gram+springs&qid=1670000387&sprefix=mx+cherry+20+gram+springs%2Caps%2C88&sr=8-1
Battery Chargin Unit 2A 5V Charge Discharge Integrated Module
Any Lipo 3.7 lipo will work with the 1.54 mm JST connector.
Battery Charging Circuit: