The figure shows the equivalent circuit for the LM381 audio preamplifier IC. The circuit was found in the February 1990 issue of Radio Electronics magazine.
The ZN414 integrated circuit consists of a complete radio from the 1980s. This single receiver...
We find this circuit in an old documentation, but it can be implemented with modern equivalent...
Using this circuit a low current switch can be used in the control of heavy duty loads, powered...