Unexpected op-amp behavior

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i have been working on using op-amp (non-inverting) control small transistors arduino.  to simplify circuit connected negative power supply of op-amp ground , positive ten volts.  this works fine input below level when expect op amp voltage output stay low goes high.  

if op-amp not designed single ended use, seeing sort of common-mode problem. use single supply op-amp, or use voltage divider provide ground reference @ vcc/2.


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