This circuit is from a factory manual from the 80s. The circuit can be implemented with more modern operationals. Capacitor C1 is a low leakage type. The power supply must be symmetrical.
This full-wave circuit was obtained in Motorola's 1974 unijunction transistors manual. The circuit...
This interesting circuit was found in a French publication from the 1980s. The circuit indicates when a...
This circuit produces paced steps of an engine whose speed can be adjusted in the trimpot. The key on...