Even without paying attention to the 3.3v voltage, no circuits will help you to power a load of 400 mA from the Uno pins, since each pin is rated for a maximum of 40mA.
Use an external power supply instead and control it via mosfets or relays
Even without paying attention to the 3.3v voltage, no circuits will help you to power a load of 400 mA from the Uno pins, since each pin is rated for a maximum of 40mA.
Use an external power supply instead and control it via mosfets or relays