HOW TO MAKE A IR PROXIMITY SENSOR
Circuit diagram - https://drive.google.com/file/d/17c1B...
Components needed:
1)lm358 ic and ic base
2)ir transmitter and receiver pair
3)led
4)10k,220r,470r resistors
5)10k potentiometer
6)pcb
7)9v battery and clip
8)buzzer