Oscilloscope / logic analyzer project update

Fri, Aug 28 2009
Posted by Jonathan Oxer A last-minute addition to the book has been an oscilloscope / logic analyzer project, inspired by the cool work done by a few enterprising people including Arduin-O-Scope, Poorman's Oscilloscope, and in particular the Arduinoscope. It's a conceptually simple project from the Arduino side but it's also a good excuse to go into some detail about how successive-approximation ADC works, tweaking the ATmega's ADC pre-scaler to optimise the sample rate, and the limitations of bandwidth on serial comms. I'm also trying to make the hardware look pretty so I made a front panel design in GIMP and printed it onto a self-adhesive sheet using a colour laser printer. The hardware should be all assembled and photographed by tonight so I'll follow with an update on the end result.