This article explains about the use of infrared light and how this can be used to send data without using any wires. Read on to know more on this.
The Attiny13 microcontroller has been used in this project which will act as an IP receiver. The infrared receiver can be taken from any old VCR. The output becomes low when the receiver detects an infrared light of 38 KHz. Otherwise, it will always keep the output pin high.
Whenever the button on the TV remote is pressed, the IR LED will automatically send a series of pulses of infrared light which are totally controlled at 38 KHZ. Then all the pulses are picked up by the IR receiver present in the VCR and by the use of controller it is decoded. Once this is done, any device can be controlled.
The working can be tested by hooking it up to a piezo buzzer and when a button is pressed, the receiver would generate some beep noise. After that the pulse code from the remote must be monitored.
To complete the task successfully, the IR receiver must be connected to the open Bench Logic Sniffer which always allows the messages which are sent by the remote to be recorded.