IR Remote Control Extender Mark 1
Description This circuit is used to relay signals from an Infra Red remote control in one room to an IR controlled appliance in another room. Forward I have seen these devices advertised in magazines, they sell for around £40-£50 and use radio to transmit between receiver and transmitter. This version costs under £5 to make and uses a cable connection between receiver and transmitter. For example, if you have a bedroom TV set that is wired to the video or satellite in another room, then you can change channels on the remote satellite receiver using this circuit. The idea is that you take your remote control with you, aim at the IR remote control extender which is in the same room, and this will relay the IR signal and control the remote appliance for you. The circuit is displayed below: Parts List: 1 SFH2030 Photodiode 1 TIL38 IR emitting diode 1 5mm Red LED 2 4.7M 1/4W resistors 1 1k 1/4W resistor 1 2.2k 1/4W resistor 1 27ohm 1/2W resistor 1 BC337 transistor 1 CA3140 MOSFET opamp The ...