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DiscoverCircuits.com -- Hobby Corner
Last Updated on:
Tuesday, June 01, 2021 03:06 PM
Hobby Circuits List
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AC Power Line Hi/Lo
Voltage Tester March 14, 2010
If you wish to test a line-powered device under both a 15% high and a 15% low voltage
condition, you can use the circuit below. The circuit uses an 18v transformer with
a 3 Amp rating. A double pole, double throw toggle switch then switches in the
transformer voltage in either a buck or a boost mode. In the buck mode, the
transformer voltage is subtracted from the line voltage. In the boost mode, the
transformer voltage is added to the line voltage. With an 18vac transformer the
normal 120vac voltage is switched between 102vac and 138vac. For 240vac power line
tests, use a 36vac transformer rated at 2A. |
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Click on
Drawing Below to view PDF version of Schematic |
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