Found in documentation from the 90s, this circuit triggers a relay with inductive signals applied to a link. The sensitivity depends on the frequency and the power supply depends on the relay used.
August 2017 - Texas Instruments' new integrated circuit BQ25872, a 7-A keyed battery charger with...
This crystal oscillator uses a common transistor and its frequency depends on the crystal used. We...
Found in the April 1995 issue of Electronics Now, this circuit operates at a lower frequency than...