When running the board at room temperature (20 C) without any extra cooling mechanisms added, how much can the Arduino Uno be overclocked?
Also, what would I need to change/update to overclock the board?
Asked
Active
Viewed 5,290 times
4
-
Do you want to be able to program your Arduino once it has been overclocked? In that case the answer is probably 0%. – jippie Mar 07 '14 at 07:50
-
You probably get a higher and more reliable performance improvement by reviewing your code and ditching some standard Arduino libraries. – jippie Mar 07 '14 at 17:43
-
See the following question – mpflaga Mar 07 '14 at 23:14
1 Answers
7
With no active cooling, most ATmega328P will run at 30MHz but you will need to up the supply voltage to ~6V. I have never done this on an Arduino board, just an ATmega328P.
I provided an external clock from a signal generator.
The only way to achieve a speed faster than 16MHz is to change the crystal/oscillator/clock input for one faster than 16MHz.
As this was just an experiment, I didn't alter f_cpu in boards.txt, so all timers etc. would be incorrect. Baud rates would also be incorrect - the only way to upload code was to change back to 16MHz.
Cybergibbons
- 5,350
- 7
- 33
- 51
-
1Very interesting data about the actual clock rate supported. As for the only way to upload code, maybe it would be easier to use ISP instead of a serial boot loader in such a setup? – microtherion Mar 08 '14 at 23:01