The circuit I describe here, and a simple counter of objects, which contain up to 99 objects (most forward and teach the ability to extend counting).
The circuit is based on three blocks, and the sensor, circuit and display.
Lock the pictures:
Step 1: Take the Parts
-1 Infra-red LED
-1 Double red LED display (common katode)
-2 IC CD4026
-1 10K resistor
-2 1k resistor
Step 2: Make Your Counter
I test my project in one protoboard.
And that. Good luck in your assembly and until the next