Potentionmeter -10k ohm
10k ohm x 2
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Circuit Diagram
It is a very simple circuit diagram...
all the details are given in the circuit
connect the two ends of the potentionmeter to pin 4 and pin 8 of the ic.
and the middle pin of the potentionmeter to the pin 2 of the ic
connect the photo diode +ve pin to the pin 8 of the ic
and 10k resistor to the -ve pin of the photo diode, and the resistor other end to the GND of the ic,
ir transmeter +ve end to the pin 8 of the ic then 100 ohm resistor to the -ve end of the ir transmeter which will go to GND of the ic. The pin 4 of the ic is the GND pin of the IC. The pin 8 of the ic is the +VE pin of the IC. Then pin 3 of the ic will connect to the joint of the ir receiver and 10k resistor.
connect 330 ohm resistor to the pin 1 of the IC which is the output pin connect the LED +ve end to the other end of the resistor and the -ve end will go to the pin 4 of the IC.
Remember pin 1 is the output pin.
Lets try out the sensor ...........