The recommended connection diagram was:
And whole article is at: https://electronics.stackexchange.com/questions/103297/measure-on-off-pulse-of-relay-with-reversed-polarity-with-a-mcu
The recommended connection diagram was:
And whole article is at: https://electronics.stackexchange.com/questions/103297/measure-on-off-pulse-of-relay-with-reversed-polarity-with-a-mcu