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Mark Stuart's original PI.

A

Anonymous

Guest
Here is the 1989 schematic for the Mark Stuart PI with the original timing circuits for those who want to experiment, without getting into programming PICs.
This is reproduced with kind permission of Everyday Electronics whose website URL is given for those who wish to further explore this fine magazine.
Eric.
 
Hi all,
Can anyone make out the parts details on this? I can't read the values.
Thanks,
Fred
 
Which is the value of the Xtal, have you the printed circuit of this circuit?. For that the diode damper BY407 is used in one of the diode that clip the pick tension?
Thank you
Carlos
 
Hi Eric,
This must be the August 89 issue, not been able to find a copy. If you could shoot me a clean photocopy of the whole article I would like to post it on my web page. EPE has also given me permission to post.
Thanks,
Carl
 
hello to all:
Because nobody responds to my questions? Does nobody have the printed circuit of the project?
Carlos (I wait an answer)
 
Hello Carlos
Unfortunately I don't have the the pcb dwg for this circuit but the layout for the circuit is not likely to be very critical so long as you keep the coil connections close to the battery and FET connections and away from the low level signal processing. So I would suggest a strip board layout.As far as the xtal is concerned this looks like 60khz on my screen.
cheers
Keith
 
I still can't make it out good enough to do anything with it. I hope it appears on Carl's web site so I can get a usable picture.
Best regards,
Charles
 
Hi Carlos,
Sorry, I should have come back on this sooner. The Xtal is 40kHz. The article does give a pcb layout for this circuit and lots of other info (5 pages) Tomorrow, I will organise some photocopies of the complete article. Anyone who would like a copy, send me $4, or equivalent, to cover postage and copying plus mail address.
Eric.
 
Pulsepower Developments, Unit 3, Area C, Radley Road Industrial Estate, Abingdon, Oxon. OX14 3RY, England.
 
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