Wiring Blueprint (v3.0)

Zero Crossings | High Clarity
R-PI ZERO 5V(2) GND(6) G18(12) 74AHCT125 1(OE) 2(1A) 3(1Y) 7(GND) 14(V) LED STRIP 5V DIN GND 5V POWER SUPPLY + -
1. Power Lines (Red)
  • Wires run along the TOP.
  • Connect PSU(+) to Pi Pin 2.
  • Connect PSU(+) to Chip Pin 14.
  • Connect PSU(+) to LED 5V.
2. Ground Lines (Black)
  • Wires run along the BOTTOM.
  • Connect PSU(-) to Pi Pin 6.
  • Connect PSU(-) to Chip Pin 7.
  • Connect PSU(-) to LED GND.
  • IMPORTANT: Connect Chip Pin 7 to Chip Pin 1 (This enables the chip).
3. Data Signals (Center)
  • Orange: Pi GPIO 18 -> Chip Pin 2.
  • Blue: Chip Pin 3 -> LED DIN.
  • Note: The blue wire is routed around/under the chip to avoid crossing other wires.