I did not really found anything on google to accomplish my idea, so try here to find out an answer:
My task is defined as follows: I need to check if the input voltage is in a specific range. Lets say, for example: 5V +/- 10% so Vmin=4.5V and Vmax=5.5V. If the input voltage is in the acceptable range then light up a LED and start a microcontroller else do nothing at all.
The problem: the voltage I want to check is the only voltage available, so I can't compare it to another for example.
I already came up with a solution but I don't think its perfect: use a simple zener diode in reverse and wait until it becomes conductive and then switch a transistor or so.
Is there a better and more professional way to do it?
EDIT: I just found a Voltage Detector IC (click) with a really low supply voltage, would that be an acceptable solution?