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RE: IR mini emitters and Sky+ box
- To: ukha_d@xxxxxxx;
- Subject: RE: IR mini emitters and Sky+ box
- From: Nick Austin <nick1@xxxxxxx>
- Date: Sat, 01 Mar 2003 02:03:01 +0000
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Sometime IR receivers will not lock if it misses the start
of the IR signal. This appears to vary with manufacturer so
I'd retry the tests stopping and starting transmission between
each value that you try.
20K is way too big. My back-of-the-envelope calculation is that
the value should be about 100 ohms (about 350-70 depending on
drive current).
An alternative way to reduce the voltage is to add one or more
diodes in series. Either a single 3.5 volt "zener" or three
cheap ones.
Nick.
"Paul Gale" <p-gale@xxxxxxx> wrote:
> It's a variable resistor I tried - continuously transmitting and
> adjusting from 20K all the way down to 0R. I think it worked best at
the
> lower 1K values but certainly didn't cure the problem.
http://www.automatedhome.co.uk
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