[sdiy] Messing with chips with light

[Aaron Lanterman]

On Jul 12, 2009, at 1:30 AM, Robin Whittle wrote:

>  I took the metal lid off the OPS chip of my Mk 1
> DX7 and then focussed light onto it using a small 12v filament lamp
> and a hand-held camera lens.
>
> This would frequently crash the chip, but at one point I was able to
> upset a particular part of the 1/4 sine-wave ROM, making a noisy
> spike in that part of the curve, where it appeared four times per
> sine-wave.

WOW.

Now THAT'S some serious circuit bending!

- Aaron