Using CMOS circuits and operational amplifiers of the time, this circuit was found in the September 1977 issue of Radio Electronics magazine. The circuit is powered by a 15 V power source.
With this circuit it is possible to compare the gain of transistors to obtain a matched pair (of...
This simple MW radio does not need an external antenna to pick up local stations. It was found in a...
When there is no voltage in the power grid, the circuit causes a lamp to light. The circuit can be...