Kyrre Aalerud said: > Problem is transferring to PC takes time, so unless I did this in USB2.0 > I'd have to capture, then send all data and wait for trigger again. Are you also considering what it takes to display this data realtime? Are you an experienced DirectX programmer? Otherwise you'll be stuck with a fancy "datalogger". Input preamps are another thing you need to be pretty experienced at in order to build something decent. I realize I sound like a wet blanket, but there's a reason why oscilloscopes are priced the way they are. It costs money to make a good one. At the very least, you should buy a used analog oscilloscope and use the frontend and trigger sections. Then you only have the digital and software challenges. Cheerful regards, Bob -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.