- Joined Apr 6, 2009
Hey all, Thanks for helping dummies like me...I am building a solar collector and will be powering a small fan with a pv panel controlled by a thermistor voltage divider setup and a comparator. My question is... I am using a voltage regulator to peg the voltage, but it will still leak undervoltage until it reaches 12 volts. There may be times when the sun isn't producing 12 volts, but the temperature is high enough to keep the comparator output high. Will the lower voltage harm the fan, if yes, how do I keep it off until it reaches say.. 11.5 volts? I've played with zeners, but I think i'm missing something.