Shop OBEX P1 Docs P2 Docs Learn Events
lm35 with long cable — Parallax Forums

lm35 with long cable

ingbakeringbaker Posts: 10
edited 2009-10-09 12:45 in Propeller 1
I want to measure 2 temperature's points in bus(car), I think:
- Use about 30foot of twisted pair cable, adc0844 and a Propeller.
- Run this adc0844 in differential mode
But I think that I will have problems with noise.
Please can you recomend a circuit for this case or what can i do for reduced the noise?
Thanks

Comments

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2009-10-09 02:32
    Please delete your cross-post in the Sensors forum before someone responds. Cross-posting is not allowed. Since this is — ostensibly — a Propeller topic, this is the correct venue, although the Sandbox would also be appropriate.

    Thanks,
    -Phil
  • StefanL38StefanL38 Posts: 2,292
    edited 2009-10-09 12:45
    Hello ingbaker,

    how about changing to a digital temperature-sensor like the lm75 ?

    Do you know what all your nerves inside your body do ?
    They convert analog signals like temparature or pressure to DIGITAL values frequency-coded
    If nature has evoluted to this solution practising it for 2.000.000.000 years it has to be a very good solution

    best regards

    Stefan
Sign In or Register to comment.