I found this in my internet travels, and I thought it was quite interesting and wanted to spread the word. It appeals to me for the concept of having an ultra-portable, handheld, o-scope. It's a fantastic concept, and I plan on building one. However, I noticed that the price of the "kit" skyrocketed recently. "Those who hesitate, lose," right?
On the other hand, the kit only makes the Gameboy read up to 100Khz. That is useful, no doubt. But I think 1Mhz would be a better setup. Is there another, non-gameboy, handheld o-scopes out there?
After seeing this, there is no question that there will be a "phone app" o-scope.
source- Game Boy Digital Sampling Oscilloscope / http://www.ranchbots.com/GBDSO/gbdso.htm
