Hi All,  I want to use a solar cell to drive a transistor based Astable Multivibrator, obviously the Vcc won't be very stable (when circuit draws current, Vcc will drop a bit, or when light intensity changes, Vcc will change as well). I want to know if the frequency of oscillation will be affected. I guess it won't since all text book mentioned that the frequency is related to the RC value but not Vcc. Am I correct?
 
Thanks in advance! 
 
John 
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