Camera OUT - Dry contact

Hello there,

we are having trouble with camera which has to open the garage door.

I tried every possible way to connect a 5V from camera usb port to 5V Relay and no luck.
Where can I get exaples of this kind of circuit.

I need the solution ASAP.

Thank you!

mx rs 232 box than you have asap a solution

We managed it, but are there any examples of simple relay circuit?

My new solution / simple relay circuit:

  1. 5V usb cable from the camera P7 to the module.
  2. This 5V relay module. I use this one:
  3. 500 ohm resistor

Everything toghether costs around 10€.