Cassette Amplifier (CB21971E)

Using the CA3130, this NAB EQ preamp has excellent gain. The power supply does not have to be symmetrical.

Astable LED (CB12038E)
This astable multivibrator configuration causes two LEDs to alternately flash at a frequency...
Simple Touch Switch (CB15424E)
In the figure we show our first circuit that consists of a simple touch switch capable of driving a...
EMG Monitor (CB13793E)
This electromyography monitor is from a 1978 publication on operational amplifiers. The components are...