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50_kHz_CENTER_FREQUENCY_FM_OPTICAL_TRANSMITTER

2016-04-06 12:12  
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50_kHz_CENTER_FREQUENCY_FM_OPTICAL_TRANSMITTER
The pulse repetition rate is relatively insensitive to temperature, and power supply voltage and is a linear function of VIN, the modulating voltage. Useful information transfer was obtained in free air ranges of 12 feet (≈4m). Lenses or reflectors at the light emitter and detector increases range and minimizes stray light noise effects. Greater range can also be obtained by using a higher power output IRED such as the F5D1 in combination with the L14P2 phototransistor. Average power consumption of the transmitter circuit is less than 3 watts.