4 to 32 minutes timer (CB21437E)

This circuit was found in a 1967 publication. Transistors can be modern general purpose. Component values can be changed for other timings.

| Clique na imagem para ampliar |

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...