Offset Adjustment Sample and Hold (CB5958E)

We find this circuit in a 1980s documentation. The circuit can be applied to modern operators with offset adjustment. FET is general purpose type.

Transistor Tester (CB1409E )
The indicator instrument of this transistor tester, from an Argentine publication of the 1970s,...
Electronic Ring Bell using an UJT (CB439)
This circuit uses two oscillators to produce a sound that seems the sound of a ring-bell. The...
Compact Multimeter (CB3871E)
The accuracy of this multimeter depends on the accuracy of the used resistors. The circuit uses a...