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n00b needs advice: Infrared Emitter and Receiver

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Shion Uzuki

New Member
Hi! I am new to electronics circuits. In my school project I need to use 5 sets of Infrared sets.

I am planning to use this type of Infrared Diodes. Can anybody tell me the approx. range of these LEDs?


Active Member
With Siemens / Vishay Telefunken IR receivers (SFH506, TSOP1738 etc.), the range can be as long as 5 meters i.e 15 feet. With more LED's you can double the distance.

For better range, LED should be powerfull and also receiver should be sensitive.


Active Member
The distance between emitter and receiver depend from circuit solutions. Most of r/c senders use impulse modulation, in this case the LED peak current about 3A! Receivers have AGC (Automatic Gain Control): the first pulse of data-packet set the receiver sensitivity to optimal.
With good lens both side possible build with 555-s an infra-gate for 10...12meters distance.
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