This circuit activates a door solenoid for a fixed amount of time when the receiver picks up a specific coded infra-red signal. The range is up to 8 metres!
The length of time the door unlocks for, can be adjusted using VR1 on the monostable.
Transmitter Circuit Voltage: 9 volts
Receiver Circuit Voltage: 6 to 9 volts
Solenoid Supply Voltage: as required, or Receiver supply
Select the required channels using the jumpers on the Transmitter and Receiver - they must be the same.
Link A0 = Ch1,2
Link A1 = Ch3,4
No link = Ch5,6.
Set Range to 2, (0.05-2.5s) with VR1 midway.