This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is 1000 M ohm.
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
The circuit shown in the figure is suggested by ON Semiconductor (www.onsemi.com), based on its...
This circuit for discharging NiCad batteries limits the current to a value that can be adjusted in the...