In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend on the desired voltage and current as well as on the characteristics of the transistors.
This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine....
This very simple continuity tester uses a small 1.5 V lamp (type used in flashlights). Can be...
This commercial radio with 3 earphone listening transistors was manufactured in Japan in the...