Hi all,

It would appear that my olimex ICD2 is broken !
I have changed the 16f877a for another, and used the hex from blueroomelectronics. This has not fixed the problem.
It connects to the icd2 fine, but when you try and program, or debug it fails to verify. Strangely enough, i can successfully download the new operating system through mplab with no problems.

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


Many thanks.

 

Does Olimex provide a schematic?

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Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com

 

ICD2 clones in general.

You changed the processor so it is should not be the problem.

Check the ICSP signals. PGD PGC and MCLR pins. PGC and PGD are not difficult but MCLR can be.

From http://stolz.de.be/ Lothar Stolz's site.
You can remove the processor and apply gnd or +5 to the socket pins to test the circuit with a volt meter.

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Does it look like this one? If so the output stages are the 74 series chips. Lucky its not that Cypress chip, tough beast to rework and no longer commonly available.

Olimex ICD2 clone, so what does the big pink resistor do?

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Bill
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Hi thanks for your replies.

They dont seem to provide a schematic.

3vo thanks for your tips, ill look into that.

Does anyone own the real ICD2?

Is it better than the clones? Ive had several icd2 clones, and they are allways dissapointing. Im gutted anyway, I could have bought the Microchip offering for the total price I paid for the olimex one. I bought it 'cheap' from sparkfun in america, and the bastard uk customs took more of my money!

If the real icd2 is more stable than the clones, i would probably have to go out and buy one. Life is too short to constantly have to mess around with ones development hardware. It just adds another variable, which is never good.

Ive not had this olimex one for very long, and allready its broken. To be fair, it had always been a bit rubbish. for instance, if i plug the cables in the wrong order, it freaks out and demands that i restart mplab. It prefers the power cable first for some reason.

 

bill, thats the one. I dont quite understand what you mean. how do you know its not the cypress one?

Thanks,
chris

 

I suspect that the big pink resistor is somehow linked to the part of this clone that emitts an ear piercing squeal! Does the microchip icd2 squeak?

 

The Cypress chip is a USB to parallel IC much like the 18F4550 version that's used in the newest ICD2s your USB wouldn't work at all if it failed.
Your Omlex is as far as I can tell a copy of the original Microchip ICD2. I've attached a schematic for a clone, it should be close to your design.
The squeal is probably the inductor, my ICD2 clone does not squeal. What part # is VR2?

Attached Files

ICD2original.pdf (51.2 KB, 33 views)

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Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com

 

thanks bill.

I cant seem to see a VR2!

 

The voltage regulator (upper right near the pink resistor) is it 3 or 5 pin?

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Bill
Smart Kits build Smart People
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Ah.. hiding behind the reg itself.

3 pin LM7805.

 

You mean you were trying to defraud the UK tax man? - and you got caught!

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I would happily defraud them! I have bought from ebay in america a few times, and The people generally do not declare the contents on the outside. This is the way forward!

I dont see how they have the right to tax me over and over again. Income tax, car tax, counsil tax (when im no longer a full time student), import tax, value added, etc, etc ,etc. If i get the opertunity to side-step some tax, then thats what ill do

 

Anyway is the real icd2 more stable?

 

Try an Inchworm+ with or without Unicorn USB board (picture of both in the Dragonfly link in my sig below). Mine has been great. No problems whatsoever.

Or a Junebug (PICkit2 compatible). Also works great.

You'll still have to deal with those gubmint bandits though. Don't steal! The gubmint hates competition.

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