Remote Control For Your Computer

Remote Control For Your Computer

Imagine we are relaxing and reading our favorite novel while listening to music on our computer, suddenly we want to skip the current song or want to pause your mp3 player. With this circuit, we can control programs running on our computer by just pressing a button on our remote, like we control our TV. To control our computer using remote you need two things.
  1. A Infrared receiver circuit : This detects infrared signals (generated by your remote) and converts them into electrical signals for our computer.
  2. Infrared Software : This decodes the electrical signals and takes action to controls our program (like mp3 player etc). The action can be any thing like "moving to next song" or "changing volume" etc.

Circuit Diagram :-

Components Required
  1. Resistors
    1. R1 (4.7Kilo ohms, 1/4W)
  2. Integrated Circuit
    1. IC1 (78L05)
    2. IC2 (TSOP 1738)
  3. Capacitor
    1. C1 (10uf, 63V, electrolytic)
    2. C2 (100nf, disc/ceramic capacitor )
  4. Miscellaneous
    1. SUB-D (9 pin) connector
    2. Infrared Remote (Any TV remote will work)
    3. Three 1-meter-long wire to connect SUB-D to IR detector Circuit
    4. PC with Serial/Com Port
    5. Flexible Wire
    6. Soldering rod
  • Heart of the circuit is TSOP-1738 infrared detector chip. TSOP-1738 detects infrared signals generated by our remote and generates electrical pulses on its out pin. These electrical pulses finally goes into our computer via serial port's DCD pin.
  • This infrared-circuit gets power from the serial port itself. RST and GND pins provide power to the circuit. IC1 (78L05) is a 5V voltage regulator, with R1, C1, C2 and D1, IC1 provides clean 5V DC voltage supply to IC2.
  • DCD, RST and GND of the circuit is connected to respective pins of SUB-D connector using 1m long wire. SUB-D connector should be connected to our computer's Serial/COM port. Please note that both 78L05 and L7805 are 5V voltage regulator chip but their in/out pin positions are different. Any of the voltage regulator chip can be used provided proper connections are made.
  • For download IR POWER infrared software from to remote control for our programs like mp3 player, media player, power-point presentation etc

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