i found this schematic, attached, for a IR sensor type circuit, and it has a coil/relay?? in it named as K1 on the schematic.
I bought a 5A SPDT High Sensitivity Relay 5V dc Coil which has 6 pins, but I don't know which pin to connect to what in the said circuit.
There is a youtube video on this circuit, but it goes into more about testing it rather than how to put it together, hence my doubts.
Also the schematic shows a diode D1 going across the couil/relay, but I can't see it in the video.
Thanks