- Pi GPIO18 to 74AHCT125 pin 1A
- 74AHCT125 pin 1Y to NeoPixel-Compatible DIN
- Power supply ground to 74AHCT125 ground
- Power supply ground to 74AHCT125 pin 1OE
- Power supply ground to Pi GND
- Power supply ground to NeoPixel-Compatible GND
- Power supply 5V to 74AHCT125 VCC
- Power supply 5V to NeoPixel-Compatible 5V.