The optical link is relative directional and can be improved by placing the leds in different angles and placing reflectors behind them. The optimal input audio level is 100 – 200mV for 1.2 – 2.4 m ...

This infrared repeater system is used to extend the range of an infrared transmitter used at an audio or video equipment at 10 m. The original signal is captured by the infrared receiver (figure 1), ...