Newbie in need of a little help (DS18B20)

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WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: Newbie in need of a little help (DS18B20)

Postby WiFive » Fri Apr 06, 2018 4:52 pm

Cellie wrote: I did not mention that as it adds to code complexity and you still need a free pin to feed your sensors.
What do you mean a free pin? For parasite mode power comes on data pin.
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Cellie
Posts: 45
Joined: Sat Feb 27, 2016 9:47 pm

Re: Newbie in need of a little help (DS18B20)

Postby Cellie » Sat Apr 07, 2018 7:02 am

and you still need a free pin to feed your sensors.
Yeah, you are right, what was I thinking when I made that post?
No idea...
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meowsqueak
Posts: 151
Joined: Thu Jun 15, 2017 4:54 am
Location: New Zealand

Re: Newbie in need of a little help (DS18B20)

Postby meowsqueak » Sat Apr 07, 2018 9:44 pm

Actually, there is a recommended parasitic configuration that uses two output pins from your CPU, one to drive a MOSFET to provide a better power supply for the single data/power wire. See Figure 6 in https://datasheets.maximintegrated.com/ ... S18B20.pdf
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