I have a simple voltage divider circuit going into a microcontroller. If i change the ratio of the divider i end up loosing resolution of the AD converter. the problem with not being able to change the ratio is that i have voltages coming into the divider above the controller limit. since i don't care about the value of the higher voltage i tried a zener on the bottom leg of the divider, in this case the voltage divider would work until the zener kicked in and then just read the zener voltage. instead the 3.3v doesn't go above 1.5v even at full voltage input. help? thanks
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