Our Loudspeaker Test Jig allows you to measure complex impedances via your PC. And as per the name, connecting a microphone to it lets you test loudspeakers. It allows you to measure the speaker or driver frequency, phase response, relative SPL and more. by Phil Prosser
This RF Signal Generator uses an AD9834 IC to generate a test signal from 10Hz to 25MHz. It’s ideal if all you need is a simple piece of test equipment that is also compact and easy to build. by Charles Kosina
Creating a 'Parts List' for Cancer's Spread, With Help From a Worm duke.edu - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from duke.edu Daily Mail and Mail on Sunday newspapers.
This ‘Songbird’ is quick and easy to build, with a simple circuit, so it is perfect for beginners and even more experienced constructors. It sports an aptly designed PCB, and once completed, will burst into song. It is powered via two AA cells and ‘sings’ via a piezo speaker. by Andrew Woodfifield