> > I just built a JDM programmer and I'm using it to program
> > PIC16F627's. Runs straight off a serial port, no external power
> > supply required, can be used for ISCP. Look for the two transistor
> > circuit at:
> >
> > http://www.jdm.homepage.dk
> >
> > Make sure you change the circuit and tie RB4 to ground instead of
> > +5V, this little gotcha got me. Then download this really nice
> > windows programming software from:
>
>     Hi Brent!
>
>     Acctualy I have one programmer and it was not working properly
>     (PROPIC
> 2), to my surprise RB4 was connected to +5V also, I just hardwired the
> pin to GND and programmer is now working great. Thank you a lot for
> the tip, by the way PROPIC2 is much faster than ICprog which I have
> tested, let me now if uou want a copy.
>

Hello Hamilton,

Thanks, I'll download the and have a look at the PROPIC2 software.

I presume that pin 10 is tied to +5V on these programmers for a
reason. Do you know which chips this applies to? The IC-Prog
software has a note saying to connect RB4 (pin10) to ground for the
PIC16F627 & 628, but doesn't say which chips need it set back to
+5V.

Brent Brown
Electronic Design Solutions
16 English Street
Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile/text: 025 334 069
eMail:  brent.brown@clear.net.nz

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