You can read the voltage directly by arduino analog input, just put a bias voltage on ref. point 2 by 2 resistors divider (8k & 1k ?) from +5V . I 'd recommend 0.55 as an offset, than negative potential brings it to 0, and positive to 1.1 consequently. Also, arduino ADC has to be set for internal REF.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16