Velleman Signal Generator Kit : MK105
If you've ever worked on amplifier circuits, troubleshooting them is nearly impossible without a signal generator to inject a signal to the input of a stage or device in a circuit. There are expensive lab quality signal generators out there that work very well. But this little generator gets the job done at less than a fraction of the price! A quick and easy generator provides approximately 1kHz fixed waves with output adjustable from 0 to 100mVrms. Choose sine wave, triangle wave, square wave, or integrator. Powered by a standard 9V battery (not included). Measures 2.2" x 1.6". From Velleman.