Ardruino Uno Not Uploading After using 12V

Using Arduino IDE 1.x
1

Hey all,

I'm running Win7 using an arduino Uno. I am running 12 V into it to use it for an LED strip.

However, it will no longer upload code and I get the avrdude: stk500_getsync(): not in sync: resp=0x00 error.

Nothing seems fried (no markings)

Any ideas? I bought two new chips (this is the second time this has happened...), and replacing it on the first one did nothing.

I really hope I don't have to buy another board....let me know any suggestions.

2

Where exactly did you plug the 12V into?

How are the LEDs wired?

3

Hey Nick, I have the LED's connected straight into the breadboard. I followed this exact schematic, except I plugged into Vin. Also, my power supply is 3A, 12V

Somehow though, it started doing this when incorporating a button into the mix (I'm trying to switch LED modes).

I did the arduino set up using the LED on the board, then set up the LED strip. Then i ran the voltage to the LED's

If you want and if it would help, I can do a breadboard design. I hope you understand what I"m saying.

Thanks again for the help...kind of frustrating when the button was working, the LED strip was working, but together it doesn;t.

4

cub526:
Hey Nick, I have the LED's connected straight into the breadboard. I followed this exact schematic, except I plugged into Vin.

What schematic?

http://www.thebox.myzen.co.uk/Tutorial/LEDs.html

5

Usage | RGB LED Strips | Adafruit Learning System #fail.
and did this for the button : http://arduino.cc/en/tutorial/button

Of course, when using the button for the Strips, I connected into 12V

6

Of course, when using the button for the Strips, I connected into 12V

Er, did you connect one end of the button to 12V, and the other end to pin 2?

7

Er, did you connect one end of the button to 12V, and the other end to pin 2?

...yes...

8

12V exceeds the maximum rating for an input pin. You should have connected the switch via 5V not 12V.

9

[quote author=Nick Gammon link=topic=149525.msg1123203#msg1123203 date=1361147319]
12V exceeds the maximum rating for an input pin. You should have connected the switch via 5V not 12V.
[/quote] That makes sense. Does this mean my board is scrap?

10

cub526:

[quote author=Nick Gammon link=topic=149525.msg1123203#msg1123203 date=1361147319]
12V exceeds the maximum rating for an input pin. You should have connected the switch via 5V not 12V.

That makes sense. Does this mean my board is scrap?
[/quote]

Perhaps not, a $6 replacement 328 chip with bootloader may get you operational once again.

Run the loop back test first (should be a sticky around here somewhere) and if that passes then go for the 328p chip replacement. If it doesn't pass then buy a new board.

NOTE: This assumes you have a standard Uno not a UNO SMD board.
Lefty

11