An LED indicator can be added to the basic Linux Infrared Remote Control (LIRC) receiver circuit with a minor modification and a few extra components.
Components[]
- U1
- Type 7805 +5V Regulator
- U2
- 38 kHz IR Receiver
- U3
- Digital inverter
- 74LS04, 4049, or any other inverter
- C1
- 4.7µF capacitor
- D1
- Switching diode, such as 1N4148
- R1
- 4.7 kΩ resistor
- R2
- 100 Ω resistor
- LED
- Red LED
Schematic[]
Description[]
Follow the instructions on the LIRC Receiver Web page for building the receiver.
- Then, add U3,R2 and LED to your circuit.
- U3 is an inverter
- Attach the Vdd or Vcc pin to the Output of the voltage regulator
- Attach the Vss or Gnd pin to the Ground pin of the voltage regulator
- Attach one of the inverter pins, A1, to the IR receiver's output
- Resistor, R2
- Attach the pin of output of that inverter to the resistor, R2
- LED
- Attach the resistor to the positive of the LED
- Attach the negative of the LED to ground
- U3 is an inverter