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Topic: Accidental capacitor discharge on Arduino (Read 815 times) previous topic - next topic

DawidJordaan

Hi I stated recently with arduino.
I have a UNO rev3.
Today I discharged a 100uF capacitor between ground and A1.

Is all lost or can I only replace the ATMEGA328P-PU micro controller.
And can it be replaced by any ATMEGA328P-PU or do I need one that is prepared beforehand?

retrolefty


Hi I stated recently with arduino.
I have a UNO rev3.
Today I discharged a 100uF capacitor between ground and A1.

Is all lost or can I only replace the ATMEGA328P-PU micro controller.
And can it be replaced by any ATMEGA328P-PU or do I need one that is prepared beforehand?


Most likely a replacement 328P will fix the problem, but there is no guarantee of that. Unless you own a AVR hardware programmer or another arduino board to facilitate burning a bootloader into a blank chip, you are better off buying one pre-installed with the Uno bootloader. Several vendors offer such.

Lefty

DawidJordaan

Ok thank you.

When you are talking about "another arduino board", is this now a separate board other than the one I discharged the capacitor on?
Can this other arduino also be a UNO rev3?
And when I have this other arduino board is the burning of the bootloader done by the areduino software?

Dawid

DVDdoug

Quote
And when I have this other arduino board is the burning of the bootloader done by the areduino software?
Here are the instructions for using the Arduino as a programmer.  (I have not tried it.)

Nick Gammon


When you are talking about "another arduino board", is this now a separate board other than the one I discharged the capacitor on?


Yes, if you don't get a chip with a bootloader already on it.


Can this other arduino also be a UNO rev3?


Yes it can.


And when I have this other arduino board is the burning of the bootloader done by the areduino software?


There are a number of ways of doing it. I describe one here:

http://www.gammon.com.au/forum/?id=11635

You just need a second board, 6 hook-up wires, and you load the "programming" sketch onto the second (good) board.
http://www.gammon.com.au/electronics

stonent

You could always pick up one of these and use it to reprogram your replacement chip.  Now you've got two boards!
http://www.aliexpress.com/item/MEGA-2560-R3-ATmega2560-AVR-USB-board-USB-cable-ATMEGA2560-ATMEGA8U2-Arduino-compatible-funduino-2560/724400409.html

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