This circuit was obtained from an Electronic Design of 1968. The circuit uses components of the time that can eventually be exchanged for current equivalents.
This speed control for motors up to 500 mA was obtained in an old European documentation, but it...
This circuit cuts a rectangular signal, and a trapezoidal signal is obtained. The circuit is from...
This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational...