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The Plant Whisperer- Propeller project on Instructables.com — Parallax Forums

The Plant Whisperer- Propeller project on Instructables.com

HannoHanno Posts: 1,130
edited 2011-02-21 02:49 in Propeller 1
Great job Jeff!
http://www.instructables.com/id/The-Plant-Whisperer
Hanno

Comments

  • jeff-ojeff-o Posts: 181
    edited 2011-02-07 19:31
    Thanks for the thumbs up, Hanno! And thanks to the folks here for creating the objects I incorporated into my project!
  • doggiedocdoggiedoc Posts: 2,245
    edited 2011-02-08 16:12
    Looks like a great project to try! Love the PCB shape!

    Paul
  • Jay KickliterJay Kickliter Posts: 446
    edited 2011-02-11 12:00
    Congrats for getting on hackaday. We need to get more Propeller projects on there.
  • graffixgraffix Posts: 389
    edited 2011-02-18 23:53
    your instructable has been reported as unsafe?
  • StefanL38StefanL38 Posts: 2,292
    edited 2011-02-19 01:29
    nice project coll designed PCB but
    what puts up the hurdle a lot is the housing of the propeller-chip.

    I agree with a DIP40-hosing it would look a bit less cooler but it would be MUCH easier to build

    best regards

    Stefan
  • Dr. MarioDr. Mario Posts: 331
    edited 2011-02-20 19:30
    Nifty! At least your plant's a happy plant, Jeff-o!
  • mickalmickal Posts: 75
    edited 2011-02-20 21:15
    Id like to ask why a Timer IC is used instead of a Cog. Also like to know if I =wanted to make a speedometer is a Cog with method below less accurate than a Timer IC ?

    I enjoyed the artical thanks Jeff.

    PUB GoodTimeCount

    dT := clkfreq/60
    T := cnt
    repeat
    T += dT
    waitcnt(T)
    seconds++
    millisec := seconds/100
  • Dr. MarioDr. Mario Posts: 331
    edited 2011-02-21 00:55
    That depends. However, using just the timer IC actually saves a COG and the memory space - the audio buffers are somewhat huge so it's best to be a bit conservative.

    How accurate is a COG? It depends on how accurate is the input clock (crystal or MEMS oscillator or just the plain crystal) and how clean is the PLL power input. (decoupling capacitor's extremely important!!!)

    With TCXO (temperature-compensated Crystal Oscillator) or TCMO (Temperature-compensated MEMS oscillator), and pretty good decoupling and filtering, it can be extremely accurate, 1 part: 80 in 80 million Hertzs core frequency.
  • mickalmickal Posts: 75
    edited 2011-02-21 01:09
    oK, THANKS Doc for the info. For my purposes I am not sure I will ever have to worry about using up a Cog, this gets mentioned a great deal. For me. if I have a Cog ill use it. thanksagain.
  • Dr. MarioDr. Mario Posts: 331
    edited 2011-02-21 02:49
    Yep. Propeller's quite flexible, so what's your plan with it is totally up to you. You can either use COG or the timer - go for it.

    And, you're welcome, mickal.
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