tag:blogger.com,1999:blog-4702287955799719958.post5865382587788758115..comments2023-06-03T09:59:00.759-04:00Comments on Arduino Your Home & Environment: AC Voltmeter and Temperature MonitorUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4702287955799719958.post-62898064379433010132017-10-31T17:28:48.292-04:002017-10-31T17:28:48.292-04:00That is correct. We are measuring voltage that is ...That is correct. We are measuring voltage that is higher than the arduino 5v, so + goes to the top of R1, gnd to the bottom of R2, and the arduino analog input connects to the bottom of R1 / top of R2 intersection. The Zener prevents an oops.KK4HFJhttps://www.blogger.com/profile/17495516851959991808noreply@blogger.comtag:blogger.com,1999:blog-4702287955799719958.post-30220577433844140732017-08-02T19:47:55.639-04:002017-08-02T19:47:55.639-04:00Question: Do be sure I'm reading this properly...Question: Do be sure I'm reading this properly, you're taking the DC- (Gnd) from the A/C bridge rectifier and connecting it to the ground bus on the Arduino? I'm afraid of toasting my Arduino, so I want to be sure!Anonymoushttps://www.blogger.com/profile/17203770719705549516noreply@blogger.com