Jacob's Ladder (CB21079E)

This circuit was found in American documentation from the 90's. The transformer is of the high voltage type for old light advertisements.

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Two Position Servo System (CB19799E)
This lockable two-position servo control system was found in documentation from the 1990s. The...
Motorcycle or Car Battery Charger (CB18939E)
The battery charger shown in the figure uses two 60 W incandescent bulbs in series to limit the...
Digital Capacimeter (CB16780E)
The accuracy of this 3-digit digital capacitor meter depends on the tolerance of the components used and...