On 9/12/06, DJ Delorie <[EMAIL PROTECTED]> wrote:

> Did you post the schematic for this before?  I'm not finding it.

http://www.delorie.com/pcb/smd-challenge/smd-challenge.sch
http://www.delorie.com/pcb/smd-challenge/smd-challenge-sch.png
http://www.delorie.com/pcb/smd-challenge/smd-challenge.pcb
http://www.delorie.com/pcb/smd-challenge/smd-challenge.png

This is the prototype board, not the final board.

See also:

http://www.delorie.com/pcb/first.html

Which is the same board.


Thank you.

I notice the LED ground current is sharing a trace with the
oscillator.  Perhaps that is contributing to the oscillators locking?
Maybe try a separate ground trace for the oscillator and the XOR/LED
part?  Here's the ultimate challenge:  Blue-wire patching a 01005
circuit.

(You can make an oscillator out of one Schmitt gate that doesn't
involve any current through protection diodes.  Oh, looks like Werner
already posted this one.)

Regards,
Mark
[EMAIL PROTECTED]
--
You think that it is a secret, but it never has been one.
 - fortune cookie


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