This circuit for voltmeter has an output of 1 V for 100 uA having been suggested by American publication of 1969. The transistors are general purpose types.
In the figure we have a circuit of a very simple audio mixer, which makes use of an operational 741.The...
This audio oscillator operates like a signal injector in a frequency given by C1. The circuit was...
The oscillator shown in the figure emits sound when or another input is taken to a high level and...