Hi All, I've tried searching but can't find anything. I can use my Arduino to act as a voltmeter for up to 5V - but I need to measure up to 9V batteries. I obviously can't plug 9V directly to the analogue input pins. Can anyone point me in the right direction to measuring up to 9V? Thanks, Ross. …

Voltmeter for up to 9V

system October 2, 2012, 6:53am 3

Osgeld:
http://www.raltron.com/cust/tools/voltage_divider.asp

Perfect. Thank you.

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