Circuit: VOLTAGE TO FREQUENCY CONVERTER + 1uS LED PULSE DRIVER __ Circuit s designed by David A. Johnson, P.E.

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Last Updated on: Saturday, December 23, 2017 02:27 PM

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VOLTAGE TO FREQUENCY CONVERTER + 1uS LED PULSE DRIVER

This circuit receives the signal from the above Amplifier and launches powerful 1uS infrared light pulses from a low cost LED that are frequency modulated by the audio information. The 10KHz center frequency of the pulse stream is low enough so a standard infrared LED can emit ten times more light than conventional long pulse techniques. The circuit is described in more detail in the transmitter section of my Handbook of Optical Through the Air Communications.

Click on Drawing Below to view PDF version of Schematic

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