Editor’s Note: Here’s a great site on how to buy and use an oscilloscope
A 3 part video tutorial series on what to look for when buying an oscilloscope, where to buy one, and how to use it.
An oscilloscope is the most important piece of electronic test equipment you can buy after a multimeter. They allow you to see, in great detail, what is going on with all the voltages in your circuit. If you ever work with audio circuits, timers, microcontrollers, radios, or anything isn’t DC, an oscilloscope will help you