This circuit was found in the December 1982 Radio Electronics magazine. The components are of types that are still commonly found. The power supply is not included.
Applying a high voltage to a mixed lamp can obtain a bluish light with a decorative effect. This...
This circuit was obtained in a 1976 magazine. We can use the 555 and another BC548 to generate square...
This AC operational amplifier has a power stage and a gain determined by R2. The maximum output...