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RE: Power Connection problem

GeoForeman

Hi Everyone, I have a project  that needs to connect rp2040, rapsberry pi pico 0 to modules : HW‑357, 3.7v 4000mA battery, usb for charging, now for other sensors

Ky-008 ,HC-SR501 , NEO-M8, 3V-5V DC vibration motors ,microSD card breakout board / microSD card Adapter, please include the breadboard..

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  • The battery could have a max voltage higher than its nominal 3.7V , maybe as high as 4.2 V. Pico has a regulator that outputs 3.3V and expects interface signals to be 3.3V compatible. Do you have a specific question about the peripherals you mentioned? Are you looking for a schematic?

  • in reply to dougw

    In the future I was considering starting a project that will use a chargeable battery.  I was thinking of having a SEPIC converter between the battery and my downstream 3.3V devices.  The thought process being that it could handle the higher than expected voltages like the 4.2V that you cite and also keep ticking as the battery voltage gets depleted.  Do you know if this is a common approach?

  • in reply to dang74

    Systems that require multiple supply voltages are very common and it is much simpler now to use efficient switching converters to meet these requirements than it used to be. It is very common to generate high voltages with step-up converters. 

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