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What are these connectors - both what kind of connector (one I believe is USB-C) and purpose?

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Those are the connectors directly on a pi4. ?Usb c is power only to the pi, ?other 2 are hdmi outputs and the last is the pi 4 audio jack. ?You can look up documentation on a pi 4 for more information.

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Ryan

KK6DZB

Neil,

The connectors are (from left to right):

1. Type C USB for powering the Raspberry Pi

2 & 3. Micro HDMI ports for connecting HDMI displays/Monitors/TV. There are two ports for dual displays

4. 3.5mm TRRS audio jack used to output the audio from the Pi.

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73,
Ragav
VU3VWR