Arduino Forum

Topics => Science and Measurement => Topic started by: panoss on Feb 26, 2019, 07:29 pm

Title: DS18B20, can I supply power to it from an Arduino 's pin?
Post by: panoss on Feb 26, 2019, 07:29 pm
Can I supply power to a DS18B20 temperature sensor from one of the Arduino 's pins?
So that with code I 'll be able to switch it on only during measurement (to lower power consumption).
(I have connected the sensor 's VCC to pin 5 of Arduino)
Title: Re: DS18B20, can I supply power to it from an Arduino 's pin?
Post by: MarkT on Feb 26, 2019, 07:41 pm
Yes probably, but there absolutely no point, the standby current is 0.75µA
Title: Re: DS18B20, can I supply power to it from an Arduino 's pin?
Post by: panoss on Feb 26, 2019, 07:44 pm
Ok, thanks.
I 'll power it from the main power rail.
It only consums high power during measurement?
And then falls to 0.75µA by itself?
I don't have to do anything?
Title: Re: DS18B20, can I supply power to it from an Arduino 's pin?
Post by: alesam on Mar 08, 2019, 08:58 pm
Nope. When 1-wire transaction is complete device automatically goes to sleep state till next transaction.