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A comment on Pump up the charge: Getting -5V from a 5V power supply. Parent comment

Re:Pump up the charge: Getting -5V from a 5V power supply by TD-Linux on Sunday October 10, 2021 @11:53PM (#28824477)
JAMMA arcade PCBs normally only use the -5V for audio opamps or DACs. The power amplifier is powered by the +12V rail (in a bridge configuration to provide +/-12V swings to the speaker).
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