This circuit confuses the infra-red receiver in a TV. It produces a constant signal that interferes with the signal from a remote control and prevents the TV detecting a channel-change or any other command. This allows you to watch your own program without anyone changing the channel!! The circuit is adjusted to produce a 38 kHz signal. The IR diode is called an Infra-red transmitting Diode or IR emitter diode to distinguish it from a receiving diode, called an IR receiver or IR receiving diode. (A Photo diode is a receiving diode). There are so many IR emitters that we cannot put a generic number on the circuit to represent the type of diode. Some types include: CY85G, LD271, CQY37N (45¢), INF3850, INF3880, INF3940 (30¢). The current through the IR LED is limited to 100mA by the inclusion of the two 1N4148 diodes, as these forms a constant-current arrangement when combined with the transistor and 5R6 resistor.
TV Remote Controlled Robot using Arduino
Basically, the Remote controls of Electronic Appliances be it TV, DVD, etc., work on IR communication principles. They transmit a code, in the form of IR pulses which is decoded by the reciever to carry out a specific operation. Each key has been assigned a specific code based on a certain standard protocol developed by the manufacturer.There are number of protocols that have been developed till the date by various manufacturers including Sony, Philips, etc. Some of common and widely used protocols are Sony SIRC, Philips RC5/RC6, NEC, etc.
How to Make a TV Remote Control Jammer
This circuit confuses the infra-red receiver in a TV. It produces a constant signal that interferes with the signal from a remote control and prevents the TV detecting a channel-change or any other command. This allows you to watch your own program without anyone changing the channel!! The circuit is adjusted to produce a 38 kHz signal. The IR diode is called an Infra-red transmitting Diode or IR emitter diode to distinguish it from a receiving diode, called an IR receiver or IR receiving diode. (A Photo diode is a receiving diode). There are so many IR emitters that we cannot put a generic number on the circuit to represent the type of diode. Some types include: CY85G, LD271, CQY37N (45¢), INF3850, INF3880, INF3940 (30¢). The current through the IR LED is limited to 100mA by the inclusion of the two 1N4148 diodes, as these forms a constant-current arrangement when combined with the transistor and 5R6 resistor.