From: gnuarm.deletethisbit@gmail.com   
      
   Jasen Betts wrote on 1/12/2018 10:56 PM:   
   > On 2018-01-12, Rheilly Phoull  wrote:   
   >> On 13/01/2018 6:28 AM, Jasen Betts wrote:   
   >>> On 2018-01-12, rickman  wrote:   
   >>>> terra wrote on 1/12/2018 3:36 PM:   
   >>>>> On 01/11/2018 09:32 PM, Jasen Betts wrote:   
   >>>>>> As is seasonally traditional, we recently had a dying tree in our house   
   >>>>>> the tree had  no roots, the base of the trunk sat in a vesel of water,   
   >>>>>> and if the water is not kept topped up the tree dies before the end of   
   >>>>>> festivities.   
   >>>>>>   
   >>>>>> So I decided to instrument the plastic vessel to confirm water level,   
   >>>>>>   
   >>>>>> ...   
   >>>>>>   
   >>>>>> but am I doing anything dumb there?   
   >>>>>   
   >>>>> All of it.   
   >>>>> I just watched Yule Log on TV. Pretty good.   
   >>>>   
   >>>> I'm not sure why a gadget is need to measure the water level.  A live, cut   
   >>>> tree needs to be topped off every day or even twice a day.  Just set an   
   >>>> alarm...   
   >>>   
   >>> I'd rather do it at my convenience, and I'm learning stuff, and   
   >>> justifying the pile of junk.   
   >>>   
   >>>   
   >   
   >> You can get good results with analogue stuff too, a couple of electrode   
   >> sensor rods joined to a simple transistor switch.   
   >   
   > Trees don't like copper, so that's why I'm using capacitive   
   > sensing.   
   >   
   > I am doing analogue stuff. it'll have a analogue meter on it when I'm   
   > done... (but I'm not going to trim the copper tape to ensure perfect   
   linearity)   
   > it'll blinkenlights too. maybe a relay in-case I want to slave a pump...   
      
   I'm pretty sure trees don't like being separated from their roots either.   
   I'm just sayin'....   
      
   --   
      
   Rick C   
      
   Viewed the eclipse at Wintercrest Farms,   
   on the centerline of totality since 1998   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)