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Forum Index : Microcontroller and PC projects : Raspberry Pico - How to Get the Voltage of the Power Input

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aFox
Regular Member

Joined: 28/02/2023
Location: Germany
Posts: 76

Posted: 01:34am 08 Mar 2023

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Hi

How can I get the voltage of the power input (Vsys or Vbus) like a battery without getting a shortcut?

Any ideas?

Gregor
Edited 2023-03-08 11:37 by aFox

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 2141

Posted: 01:57am 08 Mar 2023

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A battery (1.8V to 5.5V) can be connected to Vsys via a Schottky diode.
See latest manual p10 "Power Supply".
.
Edited 2023-03-08 12:00 by phil99

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 9139

Posted: 08:46am 08 Mar 2023

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print pin(44)*3

It's in the manual

NB: not available for the WEB version as the pin is used for the wifi I/F
Edited 2023-03-08 18:47 by matherp

aFox
Regular Member

Joined: 28/02/2023
Location: Germany
Posts: 76

Posted: 01:46pm 08 Mar 2023

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Many thanks

Yes it is.

Sorry, I overlooked this:
Pin 44 or GP29 is also ADC3 which is an analog input reading ⅓ of VSYS.

SetPin 42, DIN
SetPin 44, AIN
Print Choice(Pin(42), "VBUS is present", "")
Print Pin(44)*3, "V on VSYS"

Gregor

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