Do It Yourself Remote Control ~ The Young Engineerzz

Today i will show you how to make the simple remote testing circuit with few resistors,transistor,IR sensor,led and diode.this project can also use as the ir module for other projects like line following robot,obstracle sensing robot,edge sensing robot,etc.

Step 1: Things needed to make this remote tester are:-

For making this tv remote tester circuit you will needed the following items:-

1.small PCB to make the circuit

2.IR Sensor any IR sensor will work [i have used TSOP 1838 B]

3.BC557 [PNP Transistor]

4. IN4148 diode

5. 47 ohm resistor

6. 10K resistor

7. 1K resistor [two you will need]

8. 3V small any colour led for indication purpose

9. connecting wires

10. 4.8V power supply ( i used three to four AA battery each of 1.5 volts to make total 4.8 to 6V dc)

Step 2:- Circuit Diagram

As shown in the images we have to make the circuit according to the image .

the positive terminal of the power source is connected to the 10K,47 ohms and emitter of the transistor where as negative terminal of the battery is connected to the indicator led's negative leg and ir sensor ground leg and afterit the led's positive leg is connected to the 1K resistor and that 1K resistor other leg is connected to the BC557 transistor's collector leg and transistor's base is connected to the 10K resistor another leg and 1K resistor where as 1K resistor another leg is connected to the IR Sensor's output leg and that 47 ohms resistor another leg is connected to the IN4148 diode and othe leg of diode is connected to the IR Sensor's voltage in leg.

after fixing the arrangement into the PCB solder all the connection.

Step 3: Testing it:-

After soldering the parts on the PCB the circuit will looks like the image i have uploaded and not its the time to test it so put on the power supply and to test it bring the TV remote and press any key now as soon as we press the key the indicator led will be glow up according to the frequency of the button pressed in the TV remote.

If you want to add buzzer to the circuit then connect the circuit of the buzzer to the two legs of the led and this circuit will also work with buzzer without any modification only the thing you have to keep in mind while making the circuit is to be careful about the pinouts of the IR Sensor which you are using to make the circuit and other thing is do not apply over voltage to the circuit as in case of over voltage the ir sensor will not work and the connection will be made directly through it and the indicator led will be continuously glowing the the effect of the IR Sensor will be not able to see. if you will make exactly i have made the circuit then your circuit will never fails it will work. be careful about the other connection of circuit also.