I have made an IR proximity sensor which works fine when an LED is connected.
Figure 1: This is the IR receiver and emitter part of the circuit. The white LED is connected to ground via a 270 ohm resistor and is connected to pin 1 (the output) of the LM358
I want to connect the output from pin 1 of the LM358 to an NE555 timer which is in astable mode (with a potentiometer) so the LED blinks whenever any object is near the IR sensor.
Could anyone please help me with setting up the NE555 timer in astable mode with a potentiometer?
Figure 2: Here the LED lights up when the pencil is sensed by the IR proximity sensor
Figure 3: IR sensor schematic, to connect to the NE555
I have a 20 k potentiometer, please tell me how and what I need to connect to get a 1s or shorter time period for the blinking, whenever the IR sensor detects the proximity of an object.