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Is it possible to use an external adapter for the 5V, so connecting the + from the adapter to VCC of the relay and the - of the adapter to GND of the relay. Then IN to GPIO27. Setting this low will trigger the relay? I tried, but it seems not to work. I ask this, because I want to use a NO/NC magnetic door switch. Thanks in advance for your answer.

Yvonne

Lodv
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1 Answers1

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jqc-3ff-s-z is NOT a relay, it's a "relay module"!

The relay module has a driver circuit included on the modules board.

And yes it is possible to use a external power source to the relay module (jqc-3ff-s-z).

Just remember to:

  • Connect GND on the relay module to both the Raspberry Pi and the external power source.
  • Connect VCC only to the external power source.
  • Connect IN to only the Raspberry Pi.
MatsK
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