This circuit multiplies the input voltage by 3 and can work with up to 12 V input. The current is a few mA. We found it in the Radio Electronics magazine of December 1992.
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...