<OT> Arduino flambee

Conundrum, Wed Feb 17 2010, 09:40AM



Um, did someone order their Arduino deep fried and extra crispy? :)

Share your OC'ing stories here..
I've managed to get a 20 MHz rated 12F675 up to 27 MHz reliably to use as a scope, but it doesen't always work on all parts.
Supposedly the '683 (rated 20MHz max) can be pushed to over 33 MHz if the power supply is increased to 5.3V and well stabilised (in fact the main issue is the chip becomes sensitive to normally minor power glitches it seems)

I also discovered that even CMOS spy cameras can be overclocked, replacing the crystal and converting the video signal can generate higher frame rates - or underclock for long exposures.

EDIT:- this trick works well on the cheap B&Q CCTV cameras with the easily removeable window yielding a nice exposed chip ready for epoxy and pyrolytic graphite "window".
the chip then works as an alpha and x-ray visualiser, better still back-coat the window with ZnS:Ag scintillator and then supercool the chip (not tried yet due to lack of ZnS:Ag)

note, most if not all webcam and CMOS sensors inlcude lead in the glass, so without removing the window the performance will be poor and out of focus.



-A
"Bother" said Pooh, as he failed to find the Higgs Boson...