Ha, I was going to cheat and do that anyway, since I had my voltage divider set up last night and I was sooo close.
This morning, I can't get it to work. I thought I could build a divider circuit. Is my math off? Here's my setup:
signal in - 1M resistor - meter probe red - meter - meter probe black - 1K resistor - signal ground (out)
I'm getting ... holy cats, is it the laptop not running on battery that is causing me to get inconsistent readings?