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Using this system, you can control your IR-remote-controlled home appliances like DVD player and air-conditioner from another room without the hassle of running extra cables between the two rooms.
This circuit is basically a short-range, infrared remote-controlled electromagnetic relay driver. It can be used to control door motors or solenoid-based locks using a compact and handy remote handset.
Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design a long range IR transmitter for reliable operation over a longer range, say, 10 metres. To double the range...