Thread: Help! DIY Infra-red ?
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Old Feb 23, 2003, 01:10 PM
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Oh, and by the way, the datasheet of the TSOP 1838 speaks about 35m transmission distance from a TSAL 6200 LED using 300mA, which does not happen in my experience.

How important is the 100 Ohm/4,7uF supply filter that the datasheet recommends? I have used the PNA4612 with such a filter but have used the TSOP 1838 without. I have connected that one directly to the output of a LTC1754-5 charge pump, whose output voltage might be influenced by the pulsed actuator current. This might have cut down the secure transmission distance. Perhaps I should try it again with such a supply filter.

Regards, Jochen
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Last edited by jberg; Feb 23, 2003 at 01:15 PM.
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