Prototypology/Adapterology-1

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How to connect a analog monitor to an Raspberry Pi 4?

The Raspberry Pi 4 can also output an analog video signal that can be used with old CRT-Screens. Lets have a look into the official schematics [1] of the Raspberry Pi 4.

The A/V Jack

The part J7 is an A/V jack socket with four connectors:

  1. VDAC_COMP (the video digital to analog convertor == video signal)
  2. GND (the tree symbol means in the langauge of schematics Ground)
  3. AUDIO_R (the right audio channel)
  4. & 5. AUDIO_L (the left audio channel)

And this is how it looks on the Raspberry Pi 4:

The A/V Jack

This socket is for a TRRS jack connector:

  1. T (TIP) is connected to AUDIO_L
  2. R (RING 1) is connected to AUDIO_R
  3. R (RING 2) is connected to GND
  4. S (SLEEVE) is connected to VDAC_COMP
The A/V Jack

To connect to video signal of the Pi you need to solder a composite video cable to the jack connector.

The A/V Jack
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