Re: Auto Ranging Voltmeter
Hi
To do autoranging voltmeter you will need an external programmable divider controled by the micro in use
The switch for the divider can be electronic (cmos switch ) or mech (relay)
you can switch range by placing a limit value on the A2D result - depend on the ref volatge used
For instance if you are using 3V ref volatge and you get read result from A2D as 2.9999 depend on A2D resolution (8bit,10bit,12bit ....) you will need to swich to the next range
All the best
Bobi