GTP USB/GTP USB Lite

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MeeVal

Joined: 17 Nov 2008
Posts: 4

17 Nov 2008 20:39 gtp usb lite

Hi,
I found some schematics for GTP USB:
GTP USB +
GTP USB Lite
GTP USB
for GTP USB + isn't hex file for free download

what is better? GTP USB or GTP USB lite?
I want to programme PIC: 16F628A, 16F84, 12F675 and 18F2550

I have clone ICD2 (potyo1), but isn't working Sad

then i want to make something simpler.

Thanks

blueroomelectronics

Joined: 17 Sep 2006
Posts: 1681
Helped: 99
Location: Toronto, Canada

18 Nov 2008 1:11 gtp-usb-lite hex

My Junebug kit (PICkit2) is better than the GTP by far.

Computerman29

Joined: 23 Jul 2006
Posts: 135
Helped: 4
Location: Valparaiso, IN USA

18 Nov 2008 11:56 pic brenner support 12f

GTP USB+ is not free. The others are.

Suggestion: forget about the gtp and build a PicKit2.

Blueroomelectronics has an excellent kit (Junebug). It is, however, limited to 5v devices.

funnynypd also has an excellent kit. It programs both 3v and 5v devices, but uses smt/smd components (not as easy to build). Last I heard, he was selling the PC boards for 1 cent (plus a reasonable shipping fee).

Also, I drew the original schematic into Eagle on a single-sided board with all through-hole components (and a few substitutions). The layout is not pretty, but it works. Feel free to improve the layout as needed. Check the following link:

http://www.edaboard.com/viewtopic.php?t=296916&highlight=pickit2+th+components

Or, just buy an original. They are not very expensive. (about $50US)

MeeVal

Joined: 17 Nov 2008
Posts: 4

18 Nov 2008 12:50 gtp lite+hex

I know,
but i need something easy to build. My question is: Can GTP USB Lite programme these PIC:

Quote:

16F628A, 16F84, 12F675 and 18F2550

tijoseymathew

Joined: 13 May 2007
Posts: 82
Helped: 1

18 Nov 2008 12:53 gtp-usb [ plus ]

go for the pickit2 clone by junebug, its better and supports debugging...
The only thing that you might be bugged about is the inductor, you can wind it from simple transformer wire like I did. This was initially my only hesitation to go for that programmer...

Junebug is eqully simple as the gtp with no major part count or anything,, you can short the drain source of the mosfet shown if you dont have them.

Computerman29

Joined: 23 Jul 2006
Posts: 135
Helped: 4
Location: Valparaiso, IN USA

18 Nov 2008 13:11 gtp lite download .hex

You may also consider the Brenner8

The website is in German, but it is easy to navigate:
http://www.sprut.de/electronic/pic/projekte/brenner8/index.htm#aufbau

pranam77

Joined: 22 Apr 2008
Posts: 1071
Helped: 94
Location: Mangalore(India)

18 Nov 2008 15:19 usb-gtp

MeeVal wrote:

I know,
but i need something easy to build. My question is: Can GTP USB Lite programme these PIC:

Quote:

16F628A, 16F84, 12F675 and 18F2550

Yes. The GTP usb can program more than those PIC's. But i strongly recomend you to go for PicKit2, Brenner or Junebug for simplicity and better future. Me myself was using GTP Lite. But after i used PicKit2, i found it faar more better than the later. Good luck

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18 Nov 2008 15:19 Ads

MeeVal

Joined: 17 Nov 2008
Posts: 4

18 Nov 2008 18:13 gtp usb lite programmer board 96%

Thanks a lot.
I think that a will make GTP USB Lite, because it is simplest.
After that I'll make some better programmer (but I must find out some schematics, PCB...)
once again thank you

blueroomelectronics

Joined: 17 Sep 2006
Posts: 1681
Helped: 99
Location: Toronto, Canada

19 Nov 2008 6:03 gtp usb lite hex last

The Junebug is no more complex than the GTP plus the firmware is part of MPLAB or PICkit2 2.55
It's both a programmer & debugger, plus it also includes a 3 channel Logic Analyzer.
Just the top half of the schematic is all you need to build.