An article in Radio Electronics magazine from November 1958 showed the construction of this tube audio oscillator. Note the use of lamps as a stabilizer to obtain better sinusoidal signals.
This circuit was found in a 1970 American publication. The FETs are power types according to the...
This very simple brake light circuit is activated with the brake lights, just connecting it by...
This voltage regulator from STMicroelectronics provides a 1,2 A current in the voltage range from...