This is a 3V to 5V regulated charge pump that will provide up to 100mA output current. This charge pump mainly targets on the application in USB2.0 OTG, however, there should be no problem for more ...

For simplicity, I opt for a relay module with an external power source. For the power supply, we can use either an external 12V adapter for powering Arduino through a DC jack or we can also provide a ...