Long Range Ir Transmitter Circuit Diagram. A resistor and capacitor are externally connected to the pin 2 and pin1 respectively short with pin 3 of 4047 ic. Then the ir led emits the light of some.
As the switch is pressed the connection between an ir led and the 555 timer ic closes. The majority of the ir remotes do the job reliably within a range of 5 metres. As we know oscillation frequency of 555 timer is decided by.
It generates the continuous pulses of the frequency.
The 555 timer ic operates in an astable mode. Its advantage will be more obvious when the ir transmitter is powered by ordinary batteries. To avoid any dip during its on off operations a 100μf reservoir capacitor c2 is used across the battery supply. This long range infrared transmitter can emit pulsed ir rays up to 10 meters.
