This circuit has the spark duration controlled by a 555 timer. The circuit was found in the 1990 special issue of Radio Electronics Experimenter magazine.
This operational filter was found in a Texas Instruments publication from the 90s. The circuit...
We found this circuit in a manual from the 80's. The circuit is valid for any operation and the...
Found in the 1974 Ferranti transistor manual, this Schmitt trigger circuit uses general-purpose transistors...