Hey, guys. I'm a new Electrical Engineer guy. I wanted to build a quick easy project that would be useful, so I figured I'd make a Auto-Fan with a thermistor. I found a schematic online, which lead me to this sight. And, I want to understand what exactly happens, so I was wondering if I could just explain my current knowledge, and see what's right / wrong / Needs some tweaking.
From my current knowledge, I understand that the non-inverting input (Pin 3) gets about 1.28mA. I'm not really sure the exact range of amperage the Inverting input receives because I'm not sure if this is a NTC or PTC.
From what I've gathered from hopefully my correct logic, is that the inverting input switches the voltage 180°, thus creating a negative voltage. So, if resistance goes down, the negative voltage goes up, and thus the output goes down, and vice versa.
What I couldn't find / figure out, is the voltage required to switch the transistor. I have the datasheet open, but I can't seem to figure it out.
Something tells me that it has to do with the output? But I'm not really sure. Any help would be greatly appreciated!
From my current knowledge, I understand that the non-inverting input (Pin 3) gets about 1.28mA. I'm not really sure the exact range of amperage the Inverting input receives because I'm not sure if this is a NTC or PTC.
From what I've gathered from hopefully my correct logic, is that the inverting input switches the voltage 180°, thus creating a negative voltage. So, if resistance goes down, the negative voltage goes up, and thus the output goes down, and vice versa.
What I couldn't find / figure out, is the voltage required to switch the transistor. I have the datasheet open, but I can't seem to figure it out.
Something tells me that it has to do with the output? But I'm not really sure. Any help would be greatly appreciated!
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