This circuit was found in RCA documentation from the 1960s. The circuit uses components from that time and can measure speeds up to 10,000 rpm.
For triggering high-powered loads connected to the power grid, nothing better than using TRIACs. For...
This tube circuit is from an 80's documentation. The filter is of the selective type and the...
This circuit was obtained in a 90s EDN. The components used are from that time. The voltage...