With prototyping I put 12 volts on a IO port of the MBED-kit.

Ofcourse the chip didn't handle it very well and is destroyed. The MBED-kit doesnt work anymore.
I did some measurements with a scope and can conclude that te big ship on the front (LPC1768FBD100) is destroyed.

On farnell this chip can be ordered. I was wondering if it will work when I place a new chip. Does I need to put firmware or anything in the chip before I can use it?

Thanks for now!

Hi John,

There is no special firmware on the LPC1768, so (in theory) swapping it is fine. Can't promise it'll work, but sounds worth a try.

Good luck! Simon

Is the USB disk visible when you connect it to PC? If so, the interface chip is running properly so just replacing the LPC1768 should work.

Simon; thankyou for the fast reply! I am going to order a new IC and hopefully it wil work again.

Igor; the IC short wires the 3.3V circuit so other IC's also doesnt work....

Then I doubt replacing just the LPC1768 is going to fix it. To replace the interface chip you need the original firmware, which only mbed guys have.

Igor; As Simon said; "There is no special firmware on the LPC1768". So replacing the chip should work.

...but there is "special firmware" inside the interface chip (on the bottom of the module). It handles the USB drive, serial over USB and performs programming of the LPC1768 when you put a new bin file on the USB drive.

Igor; the IC on top of the print is broken. I understand your point, but we are talking about two different IC's.

I stop posting here until I received te chip.

What I'm trying to convey is that if you don't get the USB drive when you connect the board to PC, then it means the other (interface) chip is broken too.