Infrared Transmitter Circuit | Electronic Project Circuits

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Infrared transmitters by LM3909

This is an infrared transmitters signal circuit that is small size and using a power supply 1.5V only. by main electronic part are two the LM3909 (a LED Flasher Oscillator IC) Normally, we tend to put it to use as a simple flashing light circuit. Using a 1.5V low power supply, it’s working now, Easier to use transistors. The high frequency, it is very simple, just change the device to high frequency only. C1 and R1 is lower the higher frequency.