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PIC Thermostat. LCD or LED display?

Discussion in 'Microcontrollers' started by blueroomelectronics, Mar 11, 2007.

  1. blueroomelectronics

    blueroomelectronics Well-Known Member

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    Thermostat, Cricket my pet project.
    It's been through more changes than any other project.
    What sort of display (and how many digits) would you like to see in a thermostat?

    2, 3 or 4 digits?

    An LED display?
    [​IMG]

    Or LCD display?
    [​IMG]
    Or 2x16 LCD Character display?
    [​IMG]
     
  2. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    From a programming point of view, and also with much increased functionality, the LCD text module is by far the best option.
     
  3. blueroomelectronics

    blueroomelectronics Well-Known Member

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    I like the lcd too but it feels like overkill for a simple thermostat. I wish Hitachi would update those LCD controllers, they're so slow...

    LED displays actually will throw the temperature readings off on the PCB.

    I was reading the datasheet for the 16F917 LCD controller PIC, arrgh... Not an easy read (the LCD part) but you might learn something...
     
  4. dave

    Dave New Member

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  5. Mike - K8LH

    Mike - K8LH Well-Known Member

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    As much as I love LEDs I have to say the LCD can display much more info' at the same time (time, current temp', set point, zones, etc.) and provide intuitive prompts that would be difficult to do using LEDs.
     
  6. 3v0

    3v0 Coop Build Coordinator Forum Supporter

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    I agree. Also

    Current temperature 73.4
    Heat on/off at 74/76.0
    Daily high temperature 89.0
    Hours Heat for Month 139
    Monthly est total $58
    Heat on last 24 hour 24%
     
  7. jawadlateef

    jawadlateef New Member

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    I would advise u to keep things simple but if learning aspects are preferred u should go for LCD.
    Try!!
    bye
    - Jawad
     
  8. blueroomelectronics

    blueroomelectronics Well-Known Member

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    I'd like to keep it simple and inexpensive, ideally since the design will be RS485 or XBee it's designed more as a thermometer that communicates the temperature to a zone controller. Similar to the RCS TR-16[​IMG]
     
  9. Mike - K8LH

    Mike - K8LH Well-Known Member

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    In that case you could go either way since you probably don't have to display much information.
     
  10. blueroomelectronics

    blueroomelectronics Well-Known Member

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    Here's the simple incomplete schematic. Simple. Now I've got to test the Humidity sensor.
    [​IMG]
     

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