23 Sep
2010
23 Sep
'10
9:38 a.m.
On 9/23/10 12:25 PM, afra at aurigae.demon.co.uk wrote:
Well sure, a crystal oscillator would've been a lot more stable, but
the receiver (Vishay TSOP-7000, a really nice device) has a VERY wide
tolerance for its carrier frequency. Further, this was for an
indoor-only application, so thermal drift wasn't going to be much of a
problem either. It worked very well.
-Dave
--
Dave McGuire
Port Charlotte, FL
I designed
555s into a commercial product in 2002 and again in 2004. I
needed a ~455KHz carrier generator for an IR data transmitter, and a
555 was the easiest way to do it.
Would a crystal oscilator not have been beter for this ? I seem to
remember 555s as having a rep for not being perticually
accurate.....though I guess if it was good enough for your app, it's
prolly the simplest/cheapest solution.