Prototypology/Adapterology-1

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