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3.3V And 5V Outputs - Dc-Dc Converter Circuit Diagram | Electronic
3.7v 5v 6v 9v 12v to ±15v +15v/-15v dc dc converter step up boost dual
Lm317 to output 3.3 volts
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Level circuit shifter 5v 3v shifting spi voltage dissipated minimize power transistor down stack .
