Tag Archives: tsop1738

AVR Project – ATmega8 Based Multi channel IR Remote

Hi Friends, Today I will present an easy to build Multi channel IR Remote control system. It can control heavy loads (Up to AC 220V 6 Amps or smaller) with a touch of remote control. A total of 5 devices can be controlled from a distance of up to 20 feet. We will be using a standard remote control protocol that is called the NEC format. The NEC format is common in remote controls used with Chinese made CD/DVD players. They are easily available in Indian Markets. They also come in variety of sizes from full to small 21 keys (used in car audio systems). Our system is smart enough, so the user can set which key controls which load. Their are five load indicator LEDs which provide the state of five loads. When the device is powered on for the first time, the load LEDs start to blink one by one. That is the first load LED starts to blink, this means the system is waiting for the user to assign a key for that load. So you should press the key you want to use for that load. Once the system receives the key of your choice it stores it in internal EEPROM. From now on you can use that key to control that specific load. In this […]