For projects that use more NeoPixels, reference the wiring diagram in the Circuit Diagram page for using external power.
This section shows how to power projects that use a small amount of NeoPixel LEDs with low to medimum brightness settings.
In this project, the Feather RP2040 Scorpio is powered by a 5V 1A USB power supply and uses a total of 240 NeoPixel LEDs. The eight NeoPixel LED strips are powered directly from the Feathers RP2040 Scorpio's USB and ground pins.
Headers & JST Cable for Feather Scorpio
A 2-pin JST plug cable is connected to the Feather RP2040 Scorpio.
A 2x8 right-angled header is soldered to the NeoPixel pins on the Feather RP2040 Scorpio.
Solder Headers & JST Cable
The 2x8 right-angled header is soldered to the top side of the Feather RP2040 Scorpio.
The 2-pin JST plug cable is soldered to the ground and USB pin on the Feather RP2040 Scorpio.
Perma-Proto & Cables
The Perma-Proto board will use several cables to connect to the Feather RP2040 Scorpio and the 8x NeoPixel strips.
- 8x 3-pin JST socket cables
- 1x 2-pin JST socket cable
- 1x 2x8 IDC ribbon cable
2x8 IDC Cable Setup
Divide the 2x8 IDC cable and cut in half using wire cutters.
Separate the individual wires from the IDC cables by peeling them apart.
Locate the notch of the cable to reference the first wire that will be soldered to NeoPixel #0.
Only eight signal wires be used to connect the NeoPixel strips. Locate the wire with the white marking. Cut every other wire after the wire with the white marking.
Solder the 3pin JST plug cables to the Perma-Proto board as follows:
The red wires are soldered to the pads on the voltage rail.
The black wires are soldered to the pads on the ground rail.
The white wires are soldered to unique columns on the Perma-Proto.
The wires from the IDC ribbon cable are soldered to pads that are shared with the white wires from the 3-pin JST cables as shown.