This is the Simple Floating Supply for LCD Panel Meter. Did you ever install one of those low-cost LCD panel meters in a project only to discover that it requires a floating power supply? I just did! The meter cannot share a DC ground with the voltage to be measured.
Simple Floating Supply for LCD Panel Meter
The above circuit came to the rescue. It draws about 4 or 5 mA from the 9 volt supply and can supply up to 2 mA at 9 volts to the LCD meter or other load but the two capacitors isolate the grounds.
Simple Floating Supply for LCD Panel Meter
The above circuit came to the rescue. It draws about 4 or 5 mA from the 9 volt supply and can supply up to 2 mA at 9 volts to the LCD meter or other load but the two capacitors isolate the grounds.
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