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<font size=3>How about a color burst crystal?<br><br>
3.579545 MHz / 8136 = 439.9637 Hz. This is within 0.03 Hz or
0.007%<br><br>
8136 = 226 x 36<br><br>
It would be easy enough to program an ATTINY25 running at 3.58 MHz with
timer0 set to count to 226. Software would count 18 timer
interrupts and toggle an output. The part is available as an 8 pin
DIP at $1.60.<br><br>
Thoughts / comments? I could get and program one up if people have
interest.<br><br>
Dave</font></body>
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