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 Local Oscillator
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 Return to top of page · Post #: 16 · Written at 3:13:26 PM on 28 December 2013.
Art's Gravatar
 Art
 Location: Somewhere, USA
 Member since 22 October 2013
 Member #: 1437
 Postcount: 896

Got it:
Image Link

I can attenuate or amplify this as I please to alter duty cycle
for the input port of a chip to digitise it.

Next step is to divide the squared wave (digital pulse) by 1000 with some decade counter chips, so a microcontroller only has to count something more like 693 Hz, rather than 693 kHz for 4KQ.

I think I'm interested in a ghost in the machine...
the final project being a radio that doesn't like being tuned away from 4KQ.
 
 Return to top of page · Post #: 17 · Written at 8:48:10 PM on 29 December 2013.
Art's Gravatar
 Art
 Location: Somewhere, USA
 Member since 22 October 2013
 Member #: 1437
 Postcount: 896

Whoops, I forgot that Valve radios have analogue oscillators.
I didn't want to do the huff puff technique, but will have to.
A robot can't work with this.

http://www.youtube.com/watch?v=9Yv4jE_EqPw.
 
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