Found in the July 1970 Radio Electronics magazine, this circuit has an adjustable activation time that depends on capacitor C1. The SCR may be a 106 series equivalent.
This lockable two-position servo control system was found in documentation from the 1990s. The...
The battery charger shown in the figure uses two 60 W incandescent bulbs in series to limit the...
The accuracy of this 3-digit digital capacitor meter depends on the tolerance of the components used and...