Controlling distance of the Proximity sensor

Thread Starter

Khisraw

Joined Nov 14, 2020
36
Hi,
I have designed a proximity sensor using Vishy (TSSP58038) and IR LED (Vishay TSAL4400). The IR LED is oscialating at 38Khz. The detection distance is 15cm but I want to reduce to 3-4cm. How can I reduce the detection distance? One suggestion was to reduce the forward current to the IR LED by increasing R11. Any other idea?


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