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Most well
designed line powered products can tolerate a wide variation of AC voltages. But,
some circuits are less tolerant. The hobby circuit below can be used to test a
circuit’s ability to operate under low (brownout) AC line conditions. The
electronic circuit shown below uses a filament transformer to “buck” the normal 120vac
line voltage down to about 95 volts. A similar circuit could be used in other
countries with a 48vac transformer. Such a transformer would lower the test
voltage from 240vac to 192vac. With the components shown, the schematic has a load
rating of 250 watts.
Click on Schematic below to view PDF
version of this Circuit |
