This circuit was found in a 1967 documentation. It is intended for triggering a xenon LASER. Observe the high operating voltages of the circuit. The components used are uncommon today.
This circuit was found in an American magazine in 1978. It activates a relay when the speed of a...
This second-order low-pass Salen-Key filter was obtained from an American 1980s documentation. Formulas...
The circuit shown in figure 1 generates an intermittent tone in a piezoelectric transducer when...