Olimex ICD2 Broken! - Page 3 - Electronic Circuits Projects Diagrams Free

donniedj · 1st February 2008, 01:53 AM

Quote:

Originally Posted by HerbertMunch

Has anyone else had any problems with the olimex clone, if so did you manage to fix them?

Yes, and solved them with a hook shot to the trash. Went PICkit2 and wished I had a time machine to correct the error of my ICD2 clone ways.

HerbertMunch · 1st February 2008, 09:35 AM

Thanks everyone for your replies.

Quote:

Originally Posted by 3v0

We were all lowly students at one time. I remember digging it the sofa to find a few cents to buy resistors at Radio Shack.

You may be happier with a Junebug.

If you are at a U can can possibly get you hands on a digital scope. Take a look at what the various signals look like in real time.

Quote:

Originally Posted by blueroomelectronics

The schematic posted here is for your programmer, lets see if we can make it function.
Like 3V0 mentioned a scope would be a great tool but if you don't have one do you have a multimeter or logic probe?
What target board / PIC are you using? Can you post a photo?
It would appear to be the output stage of your ICD2.
First thing I would do is swap the 74HCT126 ICs and try it out, is the error the same or different.
Next remove all socketed ICs, check for pin or socket damage (a pencil eraser is handy here) and reseat the ICs.
Also carefully check for a dry solder joint, connectors can get them from constant unplugging / plugging so reheating the solder joint won't hurt it.

Quote:

Originally Posted by donniedj

Yes, and solved them with a hook shot to the trash. Went PICkit2 and wished I had a time machine to correct the error of my ICD2 clone ways.

I have access to only an analogue scope, but unfortunately Im doing the wrong course at uni: Computer science. Havent even had a whiff of electronics yet.

Whats better about the junebug? Can you still debug targets?

I have ruled out the boards involment in the problem. I have checked many differenent boards, they all will no longer go into debug mode, and they all program only about 30% of the time.

I have included my most recent board anyway.

Once again,
thanks very much.
Chris.

**3v0** · 1st February 2008, 09:53 AM

Yes the Junebug will debug targets. It is a clone of the PICkit2. See Microchip's site for the list of targets the PICkit2 can debug.

The Junebug includes an onboard target with a few do-dads you can play with. See http://www.blueroomelectronics.com/Junebug.htm

The schematics are included in the build instructions.

blueroomelectronics · 1st February 2008, 03:35 PM

Your old scope should work fine, try watching the PGC & PGD lines on the programming connector. Your target schematic looks good. Everything seems to be there and in the right place.
Does MPLAB think your VPP is ok? Is VPP switching properly *use MPLAB to test reset/run
Also did you swap the 74HCT126 ICs? Try it with the scope.
Also look at the Inchworm+ schematic on my site, it's simple design will show you just the basics and the 16F877 is the same so use your scope to look at any pins that go to PGC & PGD.
Does your school have access to a logic pulsar?
If not I would remove the 16F877 and with a 1K resistor and a short length of wire build a simple logic pulsar, toggle those programming pins at the 16F877 socket and watch the results on the programming connector.
And yes the Junebug debugs most 16F & 18F PICs and is just as fast as the ICD2 (not the 24F 30F or 33F yet...)
Edit:
The ICD2s 16F877 uses PORTC for controlling the rest of the programmer so it's those pins you'll want to toggle.

mvs sarma · 1st February 2008, 05:22 PM

Though,Part of the schematic doesn't tally, the 9Vac input point, it is very handy and helps debugging fast. -- olimex has bridge and perhaps the resistor is 4E7 / 2watt in series with input to regulator. U11 (DG411 could not be located on top of board- perhaps it may be on the solder side as SMD--? Even many component numbers and others would change from the board layout.
regarding debugging, Herbert Munch may get the detachable 74HCT devices checked outside on a bread board and he could find faulty gates if any. few components like transistors may perhaps be checked in-situ.

blueroomelectronics · 1st February 2008, 05:25 PM

Good eye mvs_sarma, the DG411 is probably not on the version in the photo. Seems that one may use transistors for VPP switching.

Edit: just noticed Chris's board is similar to my Unicorn board.

HerbertMunch · 1st February 2008, 05:46 PM

thanks for the input everyone.

I havent changed the dips yet. I dont have replacement ones. Im just in the business of checking the connections. I have seen a few dull joints, that need a bit of heating.

That unicorn LCD looks exactly like the ones I got from china.

cheers.

blueroomelectronics · 1st February 2008, 06:02 PM

Don't change the dips yet, the pair of 74HCT126 chips are identical, simpy swap them and see if anything changes.

mvs sarma · 1st February 2008, 06:30 PM

Quote:

Originally Posted by blueroomelectronics

Good eye mvs_sarma, the DG411 is probably not on the version in the photo. Seems that one may use transistors for VPP switching.

Edit: just noticed Chris's board is similar to my Unicorn board.

Thanks Bill
the JUNEBUG is Nice and healthy sir, and a friend of mine at Bangaluru ( formerly Bangalore, in south India) wanted to test it, so it is there and he writes PIC programs.
Nice Rev2 of assembly manual. I would post a photo of the assembled version that I took before sending the board. I have perhaps to re-install the Kodak Create and share software, after a mobo swap to Intel945GCNL.

Ofcourse, I have to now check the USB voltage which i had a problem with my earlier board.

blueroomelectronics · 1st February 2008, 06:36 PM

I look forward to a photo, Krumlink posted his and it looks great. Like yours & Futz he built his up from part he supplied.

HerbertMunch · 4th February 2008, 08:59 AM

Quote:

Originally Posted by blueroomelectronics

Don't change the dips yet, the pair of 74HCT126 chips are identical, simpy swap them and see if anything changes.

Hi bill.

are you sure? this is what olimex says:

"
you can try to change the buffers, pay attention one is HC the other is HCT type
Tsvetan / Olimex"

thanks.

mvs sarma · 4th February 2008, 05:21 PM

yes, the chip towards edge is HCT and other one (inner) is HC126

blueroomelectronics · 4th February 2008, 10:32 PM

Quote:

Originally Posted by HerbertMunch

Hi bill.

are you sure? this is what olimex says:

"
you can try to change the buffers, pay attention one is HC the other is HCT type
Tsvetan / Olimex"

thanks.

I didn't notice that.
Hmm.

mvs sarma · 5th February 2008, 02:39 AM

Quote:

Originally Posted by blueroomelectronics

I look forward to a photo, Krumlink posted his and it looks great. Like yours & Futz he built his up from part he supplied.

this another shot of the board. Little more clear.Thanks again.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Latest
Is my DMM Broken ???	iso9001	General Electronics Chat	19	20th June 2006 06:18 AM
Olimex USB programmer?	Oznog	Micro Controllers	2	19th January 2005 06:45 AM
What is the best idea for a broken Karaoke Machine?	reverend Boltron	Electronic Projects Design/Ideas/Reviews	3	19th September 2004 09:09 AM
JMD and Olimex hardware programmers	wekjr	Micro Controllers	1	16th August 2004 11:05 PM
Broken! Help!	Pennywise	General Electronics Chat	2	9th July 2003 05:28 PM

1st February 2008, 09:53 AM	(permalink)
3v0	Yes the Junebug will debug targets. It is a clone of the PICkit2. See Microchip's site for the list of targets the PICkit2 can debug. The Junebug includes an onboard target with a few do-dads you can play with. See http://www.blueroomelectronics.com/Junebug.htm The schematics are included in the build instructions. __________________ search engine for electronic parts Junebug USB PIC programmer kit., USB Bit Wacker, Homepage The 15 Minute Printed Circuit Board! (+drill time)

1st February 2008, 03:35 PM	(permalink)
blueroomelectronics	Your old scope should work fine, try watching the PGC & PGD lines on the programming connector. Your target schematic looks good. Everything seems to be there and in the right place. Does MPLAB think your VPP is ok? Is VPP switching properly use MPLAB to test reset/run Also did you swap the 74HCT126 ICs? Try it with the scope. Also look at the Inchworm+ schematic on my site, it's simple design will show you just the basics and the 16F877 is the same so use your scope to look at any pins that go to PGC & PGD. Does your school have access to a logic pulsar? If not I would remove the 16F877 and with a 1K resistor and a short length of wire build a simple logic pulsar, toggle those programming pins at the 16F877 socket and watch the results on the programming connector. And yes the Junebug debugs most 16F & 18F PICs and is just as fast as the ICD2 (not the 24F 30F or 33F yet...) Edit: The ICD2s 16F877 uses PORTC for controlling the rest of the programmer so it's those pins you'll want to toggle. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com Last edited by blueroomelectronics; 1st February 2008 at 03:39 PM.*

1st February 2008, 05:22 PM	(permalink)
mvs sarma	Though,Part of the schematic doesn't tally, the 9Vac input point, it is very handy and helps debugging fast. -- olimex has bridge and perhaps the resistor is 4E7 / 2watt in series with input to regulator. U11 (DG411 could not be located on top of board- perhaps it may be on the solder side as SMD--? Even many component numbers and others would change from the board layout. regarding debugging, Herbert Munch may get the detachable 74HCT devices checked outside on a bread board and he could find faulty gates if any. few components like transistors may perhaps be checked in-situ. __________________ Regards, Sarma.

1st February 2008, 05:25 PM	(permalink)
blueroomelectronics	Good eye mvs_sarma, the DG411 is probably not on the version in the photo. Seems that one may use transistors for VPP switching. Edit: just noticed Chris's board is similar to my Unicorn board. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com Last edited by blueroomelectronics; 1st February 2008 at 05:28 PM.

1st February 2008, 05:46 PM	(permalink)
HerbertMunch	thanks for the input everyone. I havent changed the dips yet. I dont have replacement ones. Im just in the business of checking the connections. I have seen a few dull joints, that need a bit of heating. That unicorn LCD looks exactly like the ones I got from china. cheers.

1st February 2008, 06:02 PM	(permalink)
blueroomelectronics	Don't change the dips yet, the pair of 74HCT126 chips are identical, simpy swap them and see if anything changes. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

1st February 2008, 06:36 PM	(permalink)
blueroomelectronics	I look forward to a photo, Krumlink posted his and it looks great. Like yours & Futz he built his up from part he supplied. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

4th February 2008, 05:21 PM	(permalink)
mvs sarma	yes, the chip towards edge is HCT and other one (inner) is HC126 __________________ Regards, Sarma.