Orbit Harness Wiring
Orbit · Build 1 · new 4-wire plug cables

Harness Wiring

Your JST plug cables have four wires: black, red, white, yellow. The colours on these cables do not mean power and ground the usual way. What each wire carries depends on which socket it's plugged into. Everything below is read from the labels printed on your board.

The one rule: on the CN1 cable, red is a signal (IO22), not power, and yellow is 3.3 V. On the P3 cable, yellow is IO21, the screen backlight, so never connect it. Go by this page, not by the wire colour.

Your board, labelled

Back of the CYD board with the three 4-pin sockets circled: P3 top left, CN1 next to it with the black-red-white-yellow cable plugged in, and P1 on the right edge. Below, a key for each socket.
The cable plugs in only one way, so each colour always lands on the same pin. Black sits on the GND pin on all three sockets.

What each wire does

P1 · power in

yellowVIN ← power board 5V+
blackGND ← power board 5V−
redRX · don't cut: insulate the end
whiteTX · don't cut: insulate the end

CN1 · mic + amp

blackGND → mic GND
redIO22 → mic SCK + amp BCLK
whiteIO27 → mic WS + amp LRC
yellow3.3V → mic VDD

P3 · mic data

redGPIO35 → mic SD (printed IO33, a misprint)
blackGND · cut short, tape
whiteIO22 · cut short, tape
yellowIO21 · backlight, never use

Diagram 1 · Power

The battery feeds the power board. Its 5V output goes to two places: the screen through the P1 cable, and the amp. The cable wires are short, so splice your red and black 22 AWG wire onto them (● = solder joint with heat-shrink).

Battery holder2 × 18650 + red− black Push buttondiagonal legs Power boardUSB-C charging B+B−K 5V+5V− Screen · P1 plug VINGND yellow wireblack wire Amp VINGND yellow + tape (K) red 22 AWG splice ○ ● = wires joined at the pad ○ = splice: your 22 AWG wire soldered to the short cable wire, then heat-shrink Two wires go on each 5V pad (twisted together before soldering), one to the screen and one to the amp.

Diagram 2 · Audio (mic and amp)

CN1 and P3 feed the mic. IO22 and IO27 also go to the amp, so those two wires split. The IO4 pad wire (plain white) goes straight to the amp's DIN pin.

Screen (CYD) CN1 plug GND IO22 IO27 3.3V P3 plug IO35 other 3: cut + tape (yellow = IO21, never) RGB LED pad IO4 cable your 22 AWG Mic (INMP441) GNDSCKWS VDDL/R. SD Amp BCLKLRCDIN plain white (no tape), solder at the pad ● = splice where one wire becomes two (strip a window in the wire, wrap the branch, solder, heat-shrink) ○ = cable-to-22 AWG splice

Every connection, in one list

FromCable wireYour 22 AWGTo
Power board 5V+P1 yellowredScreen VIN (via P1 cable)
Power board 5V−P1 blackblackScreen GND (via P1 cable)
Power board 5V+ / 5V−nonered / blackAmp VIN / GND
CN1 GNDblackblackMic GND (+ L/R jumper)
CN1 IO22redblue, splitsMic SCK + Amp BCLK
CN1 IO27whitegreen, splitsMic WS + Amp LRC
CN1 3.3VyelloworangeMic VDD
P3 2nd contact (GPIO35)redyellowMic SD
IO4 resistor padnonewhiteAmp DIN
Battery + / −noneholder wiresPower board B+ / B−
Buttonnoneyellow + tape / blackPower board K / B−
Speaker + / −nonered / blackAmp green terminal + / −
Unused: insulate each endP1 red + white (keep full length, insulate: handy for serial debugging) · P3 black + white + yellow (IO21)

Check before you power it

  1. P1 colours. Plug a cable into P1 and one into CN1, with no battery connected. Multimeter on beep: touch the black wire of the P1 cable and the black wire of the CN1 cable. It should beep, because both are GND. If it doesn't, the P1 cable is the other way round, so stop and send me a photo.
  2. 5V at the cable. With the P1 cable unplugged from the screen, put the cells in, press the button, and measure between the cable's yellow and black: about 5.0–5.2 V, yellow positive. Then cells out and plug it in.
  3. 3.3V at CN1. With everything plugged in and powered, measure CN1 yellow to black: about 3.3 V. That's the mic's power. Never put 5V on this wire.
  4. Splices. Slide heat-shrink on before soldering, and shrink it over every joint. The cut, unused wires get a wrap of tape each so they can't touch anything.