The influx of the Internet of things (IoT) devices has created a huge demand for connecting everything to everything. In the same race, this remote control for home appliances lets you connect your regular everyday appliances to be controlled by a remote. All you have to do is connect this circuit to any of your home appliances (lamp, fan, radio, etc) and you are good to go. The appliance can now be controlled by a remote control working at the designated frequency. The circuit can be activated from up to 10 metres.
Remote control for home appliances: Working Basics
The 38kHz infrared (IR) rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground, pin 2 is connected to the power supply through resistor R5 and the output is taken from pin 3. The output signal is amplified by transistor T1 (BC558).
The amplified signal is fed to clock pin 14 of decade counter IC CD4017 (IC1). Pin 8 of IC1 is grounded, pin 16 is connected to Vcc and pin 3 is connected to LED1 (red), which glows to indicate that the appliance is ‘off.’
The output of IC1 is taken from its pin 2. LED2 (green) connected to pin 2 is used to indicate the ‘on’ state of the appliance. Transistor T2 (BC548) connected to pin 2 of IC1 drives relay RL1. Diode 1N4007 (D1) acts as a freewheeling diode. The appliance to be controlled is connected between the pole of the relay and neutral terminal of mains. It gets connected to live terminal of AC mains via normally opened (N/O) contact when the relay energises.
Demo Video of Remote Control for Home Appliances (Credit: Sriram Karthik)
Hope this remote control for home appliances made your life a little easier. Another project titled make IR remote should also be helpful.
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