Hi, I’ve read about using the VIN pin as a power source here, but it also cautions not drawing too much current from this leg while plugged in to a USB wall wort to power the Photon. I have tried to research but cant find how much each of these one wire temp sensors (DS18b20) draw, I am looking to hook up a few (4 for sure, maybe going as high as 12 if I can?).
Can anyone comment on whether it would be wise or not to use the VIN leg (which for me is reading about 4.7V when plugged in using the USB port, definitely within the range on the datasheet of the DS18b20), to power anywhere from 4-12 of these devices? As I understand the biggest limiting factor is the amps provided by the USB wall wort.
Also, for completeness, it mentions on the thread I linked above that you need to be careful which pins you use for the “data” wire as not all are tolerant of voltages >3.3V.
Thanks very much for any insight you can share!