This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the output power depends on the supply voltage. The power supply must be 30 V symmetrical.
This oscillator was found in a 1967 EEE. The transistor supports a modern equivalent. The power...
This second-order low-pass Salen-Key filter was obtained from an American 1980s documentation. Formulas...
This interesting circuit of a 1988 documentation consists of a mouse trap where the sensor is left to...