RCD Programmer

Have a good idea for a new product for SFE or Olimex? Let us know!

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RCD Programmer

Postby spcutler » Sun Mar 06, 2005 7:59 pm

Idea for a cheap PIC programmer to replace/supplement the PG-1: the RCD programmer, as documented here:
http://feng3.cool.ne.jp/en/rcd.html

I had some serious problems with the PG-1 and discovered problems with JDM designs and PICs like the 12F675 when using the internal oscillator. Those problems can be found documented here:
http://users.tpg.com.au/btkelly/jdm_b.htm

That link advises adding a MOSFET to the JDM design, but I wasn't able to modify my PG-1 so I can't vouch for it.

The RCD I built works great, though. Very simple--only resistors, caps, and diodes are needed (hence the name). After a bit of playing around, it now works perfectly 100% of the time.

There are only 16 components which should be <$1 in total cost (not counting wire/PCB/housing/etc.).

Incidentally, no criticism of Olimex is meant--the PG-1 works perfectly as designed. The problem is with the JDM design, not Olimex's workmanship (which is exemplary, expecially for an $11 item!).

-Scott
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I've been working on this one...

Postby zilym » Sun May 01, 2005 2:06 pm

Thank you for posting the link to that RCD Programmer, I would have never found it otherwise.

I'm working on making a pre-assembled board using a charge pump VPP like the RCD Programmer. You can read about my progress and get the current schematic from here:
http://www.k9spud.com/hoodmicro/

I'm not ready to start selling them yet, but I'm getting closer...
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Postby spcutler » Sun May 01, 2005 10:54 pm

You're welcome!

That's a neat project; I may well be interested in one in the future.

-Scott
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Postby sparky » Tue May 03, 2005 12:38 pm

Nice project! I recognize those PCB confirmation emails and the plastic hoods !;)

-Nathan
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Postby zilym » Wed May 04, 2005 5:19 am

Totally wouldn't be possible to cram that much electronics inside a DB9 to DB25 plastic hood if it wasn't for low cost, double sided PCBs with plated through holes from SparkFun! :D
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