This IR Based Load Automation project describes a new economical solution of controlling electrical loads wirelessly using handhelp switchpad. The control system consists of an IR transmitter and receiver, a microcontroller that collects data from the TSOP  receiver and controls the electrical loads ON/OFF operations.

The IR LED acts as a  Transmitter and TSOP1738 Receiver Sensor acts as a receiver The HT12A is IR Encoder and HT12D is Decoder. Momentary switches are interfaced to the IR transmitter through Encoder IC .

The encoder always reads the status of the switches, passes the information to the IR transmitter and the transmitter transmits the information.

At the receiving end, the IR receiver receives this data, gives it to IR decoder. This decoder converts the single bit data into 4-bit data and presents it to the microcontroller. Now, it is the job of the controller to read the data and perform the corresponding actions for load switching.

 Software Tools:

  1. Keil Compiler
  2. Embedded C Code
  3. ucFlash

Hardware Tools:

  1. Microcontroller AT89S52.
  3. Encoder HT12A and HT12D Decoder.
  4. Relays
  5. Switches.

Block Diagram:

 Transmitter Section


Receiver Section