Just point this small device at the TV and the remote
gets jammed . The circuit is self explanatory . 555 is wired as
an astable multivibrator for a frequency of nearly 38 kHz. This is the frequency
at which most of the modern TVs receive the IR beam . The transistor acts as
a current source supplying roughly 25mA to the infra red LEDs. To increase the
range of the circuit simply decrease the value of the 180 ohm resistor to not
less than 100 ohm.
It
is required to adjust the 10K potentiometer while pointing the device at your
TV to block the IR rays from the remote. This can be done by trial and error
until the remote no longer responds.
