This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
Using in operational amplifier is possible to increase the dissipation power of a zener. This...
This circuit is from Radio Shack documentation from 1977. It aims to demonstrate the principle of...
With this circuit it is possible to use an oscilloscope as a quick component test, checking its...