How about a kit?

http://www.voti.nl/wisp628
Assuming you are outside the EC it will cost you $ 24.59 (using PayPal,
includes ww s/h)
Specifically supports 16f877 (and most other flash PICs)

Wouter van Ooijen

-- ------------------------------------
http://www.voti.nl
PICmicro chips, programmers, consulting


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Kieren Johnstone
> Sent: Saturday, August 03, 2002 10:47 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: My latest woes! (programming)
>
>
> OK, well this isn't working.
>
> If anyone wants to build me one (for a price, of course), e-mail me
> individually and I can send you details..
> I only offer this because I feel there isn't a specific
> 16F877 programmer
> out there and (evidently) I lack the knowledge to build one
> that works! ;)
>
> Of course, if anyone has ideas regarding my current setup
> that would still
> be helpful!!
>
> Look forward to hearing from you ;)
> -Kieren
>
> ----- Original Message -----
> From: "Jim" <james3162@WORLDNET.ATT.NET>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Saturday, August 03, 2002 9:23 AM
> Subject: Re: [PIC]: My latest woes! (programming)
>
>
> > At 12:00 PM 8/3/02 +0100, you wrote:
> >
> > Hey guy
> >
> > >Hiyas,
> > >I built Jim's programmer (uses 74HCT125 now)... anyway now
> I have the
> > weirdest results yet (yay)!
> > >Just as an example, I'll do some stuff riiiight now..:
> > >
> > >* Turned on +12V, +5V (actually more like 3.6V - 3xAA
> rechargable), but
> > programming
> > datasheet says this is fine)
> >
> > Hmmm I don't know about 12v did you build the 2 regulators into the
> circuit?
> > I'v seen it mentioned on the list before that 12v is
> pushing it. with the
> lm317
> > you get 13v. I have been using my programmer to program my
> robot which has
> > a large 12v gelcell and a 7805 regulator of it's own to
> power the 16f874
> but
> > alot of times I get failed to program running it from that
> 5v. I have to
> connect
> > it to my bench 5v supply then it always works. So maybe you are have
> trouble
> > with your battery supply for 5v.
> >
> >
> > >* Loaded FPP, checked setup (ok)
> > >* Clicked read, ok
> > >* Woo!  Screenfulla' 3F8C's code, 00 00 etc. data
> > >* Clicked load, loaded FLASHLED.HEX
> > >* Clicked program, ok
> > >* "Failed to program code!" instantly
> > >* Clicked read, ok again, for kicks.. got 2C24 followed by
> 8 0000's, then
> > all 3F8Cs.  Near the end, 3FFF x4, 0000, then 3F16 09A5.
> Data is now all
> > 80's!  Config has also changed, from "####" to "2C24"
> > >* Reset power supplies, clicked read, got 3FFF, load of
> 0000s, data all
> 0000s.
> > >* Ooie, transistor is hot.. I'll try turning it round
> *shrug*.. nope, now
> > it all reads as --Blank-- and still fails to program..
> turned it back,
> reads
> > 3FFF then 00s again.
> >
> > Ok I'm getting the feeling that your using an external 12v
> supply for mclr
> > that may work
> > for programming but if you are note the schematic you are
> connecting 12v
> to
> > the collector
> > of the transistor through 100 ohms this may be to much
> current in the
> > schematic 13v
> > goes to mclr through a 2.2k then the transistor when turned
> on pulls it to
> > ground
> > through the 100ohm total 2.3k resistance. I used a 2n3904
> suface mount
> > transistor here
> > and it's running cool. (god it's hard to concentrate with a
> 2 year old
> > crying for barny)
> > If you want to try programming with a 12v supply connect it to mclr
> through
> > a 2.2k
> >
> > If all else fails. Disable read by setting (read & in) in
> fpp setup to
> nothing
> > program the chip see if it flashes the led.
> >
> > Jim
> >
> >
> > >* Doesn't work if I connect +12V connectly to MCLR either
> (with 100ohm
> > resistor)
> > >
> > >I have... no idea.. if anyone is recognising anything
> click that lil
> reply
> > button :)  Thanks
> > >
> > >-Kieren
> > >
> > >--
> > >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#nomail Going offline? Don't AutoReply us!
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> >
>
> --
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>
>

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