I'm working a bit again on a circuit that allows safe and "almost" error free messurement on mains voltage (search givmon on openenergy)<br><br>i have all the bits reasonble placed and observed the 3mm creepage between mounting holes etc...<br>
<br>but i need to calc what voltages there are present where to make 100% sure<br><br>of course i have googled but i cant find an easy to understand answer for these 2 q's:<br><br><br>adding 3 2.2Mohm in series to both the neutral and line wires.. what would the drop be?<br>
<br>and what would the drop be across a 0.47uF capacitor? the mains are connected via that to a bridge recitifier and need to know what voltages i can expect arround those<br><br>/bo<br>