Smoked my Ardunio UNO R3 today.

Other Hardware 3rd Party Boards
1

I managed to burn out a diode ( D1 M7 ) that appears to be between the external power jack and the voltage regulator. But the board seems to work fine on USB power. Searched the web trying to find
what/where to get a replacement diode but no luck so far.

Anyone out there have a fix for this ?

Thanks.

2

If the board schematics are to be believed then it's a SMB package diode.
Maybe something like this will do.

3

Riva

Yes it looks like that diode will work. Now to try to find somewhere to get just one or two of them.

Thanks.

4

Oldtron:
Yes it looks like that diode will work. Now to try to find somewhere to get just one or two of them.

Unless you have a local electronics shop or an old PCB with one on you can use you will be hard pressed to get some as cheap as the eBay link. I buy stuff from Mouser, RS and Farnell but the delivery charges would be more than the components cost and eBay price.

5

Well it seems that the cheapest I can get any here in the USA is approximately $10.
So, I cobbled in a 1n4003 1 amp diode soldered onto the traces. It doesn't look to great
with a gob of hot melt glue holding it on but it is working ok. I would have preferred a direct
replacement part but couldn't justify the cost.

Thanks for the help.

6

That's fine. I found these on ebay.com but still probably not worth the hassle.

7

Oldtron:
I managed to burn out a diode ( D1 M7 ) that appears to be between the external power jack and the voltage regulator.

That's a great party trick.

Let me guess - you accidentally connected "Vin" to Gnd?

8

Actually I was using a Adafruit motor driver and the diode burnt out while the motor was operating.

9

Oldtron:
Well it seems that the cheapest I can get any here in the USA is approximately $10.

You're in the USA? Digikey is where it's at. Cheapest ship option is around $3, and they will sell you one of something. And they have damned near everything.