Hello Dwayne,
I tried to search in piclist archives your"stoopid buffer circuit", but=20
can't find it !
Can you help me ?
Thank you

Dwayne Reid a =E9crit:

> At 04:43 AM 3/15/2004, jisak wrote:
>
>> Hi all
>>
>> Do you know if it is possible to make ICSP with Picstart+ for 12fxxx,
>> and how ?
>
>
> Yes.
>
> First: search for "ICSP" at the Microchip website and build up the buff=
er
> circuit shown in several of the app notes.  This takes care of Vdd + Vp=
p.
>
> You may also need to buffer the serial clk and data lines.  I've=20
> mentioned
> previously my "stoopid buffer circuit" - search the archives for that
> string.  Note the silly spelling of "stoopid" - it should be easy to
> find.  This very simple buffer is neat in that it allows bi-directional
> communications with the programmer while having enough current gain to
> drive fairly heavy loads connected to those PIC pins.  In my case, thes=
e
> are 820 Ohm loads to Vdd - far too much load for the PS+ programmer to=20
> drive.
>
> We've done up a little card that sits on top of the PS+ and comes out=20
> to a
> connector that mates with one of our products.  I'll see if I can get t=
he
> files converted to GIF or JPG or whatever (right now, they are in HPGL
> format).  The card works well with 12c508, 12c671 and 12F675 parts.  It
> should work with all 12 bit & 14 bit parts but I have only used with=20
> the 3
> part numbers mentioned.
>
> dwayne
>
> --=20
> Dwayne Reid   <dwayner@planet.eon.net>
> Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
> (780) 489-3199 voice          (780) 487-6397 fax
>
> Celebrating 20 years of Engineering Innovation (1984 - 2004)
>  .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-
>     `-'   `-'   `-'   `-'   `-'   `-'   `-'   `-'   `-'
> Do NOT send unsolicited commercial email to this email address.
> This message neither grants consent to receive unsolicited
> commercial email nor is intended to solicit commercial email.
>
> --=20
> http://www.piclist.com#nomail Going offline? Don't AutoReply us!
> email listserv@mitvma.mit.edu with SET PICList DIGEST in the body
>
>

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads