An LED indicator can be added to the basic LIRC receiver circuit with a minor modification and a few extra components.

Contents 1 Components 2 Schematic 3 Description 4 References

ComponentsEdit

• U1
  • 5V Regulator
  • 7805
• U2
  • 38kHz IR Receiver
• U3
  • Basic digital inverter
  • 74LS04, 4049, or any other inverter
• C1
  • 4.7µF capacitor
• D1
  • Any basic switching diode
  • 1N4148
• R1
  • Resistor (4.7 kOhm)
• R2
  • Resistor (100 Ohm)
• LED
  • Basic red LED

SchematicEdit

DescriptionEdit

Follow the instructions on the lirc webpage for building the reciever. LIRC Receiver webpage.

• 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

ReferencesEdit

• http://www.manoweb.com/alesan/lirc/circuit.html
• http://www.lirc.org/receivers.html