Connect the power for the infra-red sensor and test with the use of the reflector. Try how far the distance can achieve between the sensor and reflector.

Use the 12V power supply to test the relays.

You can use the strobe light or the electric fan to test the solid state relay with 220V AC.

Design a circuit to control an electric device (strobe light or fan) with the infra-red light sensor. Specify first if you want an obstacle to switch on or off the device and draw a circuit diagram.