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Electronics

PCB Header colours

After a lot of searching on the internet I was unable to find a standard set of colours for radio control PCB headers (e.g. Tx & Rx pins on a flight controler).  The only standard ones I could find are, red for + voltage (usually 5v) and black for - / ground.  Using white for a PWM or serial Rx pin also seems common but not universal.

With this in mind and in order to help myself when wiring up my RC electronics I have decided to use the following colours.  Please note that they are in no way a specified standard. They are just colours that are convenient to me.

 

Function Colour Comments
+ voltage 4.5v or 5v Red  
- / Gnd Black  
PWM White  
Serial receiver / UART Tx White  
Serail receiver / UART Rx Blue  
 + voltage other than 4.5v or 5v Yellow  
 Video Green  
  Orange  

 I found that when soldering header pins to PCBs it was easier to solder them on as a single strip (ignore the colour of the strip). Then remove the plastic coloured part and replace it with the correct colours for the individual pins.

Published: 19 May 2022

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