This sensitive two-transistor circuit was found in the June 1965 Radio Electronics magazine. The circuit has low drift and uses an analog instrument. The input resistance is high.
This filter was found in the October 1969 issue of Radio Electronics magazine. The frequency...
This low-power, low-supply voltage amplifier uses a preamplifier to achieve a high-gain...
In a bistable circuit, as shown in the figure, we use two sensors. When one of them is touched, the...