This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
This astable multivibrator configuration causes two LEDs to alternately flash at a frequency...
In the figure we show our first circuit that consists of a simple touch switch capable of driving a...
This electromyography monitor is from a 1978 publication on operational amplifiers. The components are...