Quantity   Component name
1 × LMC555 ‎296-34367-5-ND‎
1 × Optoisolator 160-1361-5-ND‎
1 × .0042uf capacitor Timing Capacitor
5 × Neopixel
2 × 10 ohm Resistor 555 Pulse Output current Limit and MIDI Power output (3.3v) - 5ma
1 × 100k Resistor Timing Resistor
2 × 3.5mm stereo jack ‎CP-3524SJBECT-ND‎ and CP-3524SJGRCT-ND‎
2 × Electrode Pads ('tens' snap gel pad)
1 × Snap Electrodes
1 × 10k Potentiometer - 9mm ‎987-1277-ND‎
1 × 220 ohm Resistor ESP8266 voltage Divider
1 × 100 ohm Resistor ESP8266 voltage Divider
1 × Adafruit ESP32 Feather, Huzzah, or other Feather
1 × LiPo Battery - 350mAh
1 × 3D Printed Enclosure
1 × Mini Switch for Power/Enable https://www.amazon.com/Cylewet-Vertical-Switch-Arduino-CYT1016/dp/B01N7NCW8N/ref=sr_1_3?crid=16A9RAIVSD77P&dchild=1&keywords=mini+spst+slide+switch&qid=1597760571&sprefix=mini+spst+%2Caps%2C143&sr=8-3
1 × 3v DCDC isolator 811-2889-5-ND‎