Hi - I got a brand new solar cell "Eco Line ES10M36".   
      
   In my garden, under full sun it provides 21 volts and 500 mA,   
   and under big shadow it gives 18 volts and 30 mA.   
      
   Load is a 24 volt bulb lamp in series with the Fluke.   
      
   As the voltage margin is small, I want to detect the intensity   
   to determine if there is sun or not.   
      
   What electronic circuit would you recommend to do it ?   
      
   If I place 2 resistors conected in serial,   
   the voltage drop will have the same small margin the cell has ...   
      
   Thanks.   
      
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