Electromechanical counter project

This is a device that can take input from any source as a voltage pulse and increment the number by itself

We can use the above circuit as receiver moudle and connect a electromechanical counter to the relays normal open pin we can use a laser as transmitter or shadow of a pearson

please follow the diagram in the right side

relay is 12 volt

this is electro mechanical incremental counter you can get one for 8 dollers 1 pulse=1 count{n=n+1}