Boron Power Issue with Sharp Dust Sensor

[Rftop]

@Aidan

Can the Boron take a 12v input though?

Yes. A quick search revealed a few Posts on the forum related to this:

Powering Boron using 12v

Yes. 12v should work on VUSB. I still don’t like how this is never stated explicitly in the docs. You would have to review the Boron schematic on your own and look at how the PMIC (BQ24195L) is connected to the board pins. Then you have to pull the BQ24195 datasheet and look at what that maximum spec is. Here you can see that VUSB labeled on the board is VIN on the schematic: [image] Here you can see that Vin is directly connected to the BQ24195L VBUS pin: [image] Normal operating voltage f…

Boron LTE w/ Solar- Trials

When the Boron is powered via USB, and Vusb is used as an output to power a peripheral, the Vusb port will output 4.5-5v and the output current is limited to the USB port specification. USB v2.0 and prior ports are limited to 500mA. USB 3.0 and newer may supply more current but are not required to. So, if you account for the power draw of the Particle device, you can pull about 450mA from the USB port. When Vusb is used to power the Particle Device, then the voltage is limited to less than 12V.…

Boron LTE w/ Solar- Trials

A bit of clarity here. Actually, the Vin pin is connected to the Vusb input via a reverse-voltage protection diode. This diode prevents damage to the powering USB supply when the Boron is also being powered via Vin. It is the Vin pin that should be used to power the Boron with 3.9V to 12V.