Timeline for Voltage Divider or Step-down transformer for voltage sensing 240V AC
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Jun 11, 2020 at 15:10 | history | edited | CommunityBot |
Commonmark migration
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| Jun 11, 2020 at 10:54 | history | reopened | Russell McMahon♦ | ||
| May 16, 2020 at 5:23 | vote | accept | DrakeJest | ||
| May 16, 2020 at 5:19 | comment | added | DrakeJest | @RussellMcMahon I always was thought circuit one was very dangerous, but seeing it in a datasheet application makes me second thought if maybe its not that bad, apparently i was right it is really bad ! As you said it place belongs to a very controlled conditions which i doubt i can provide. | |
| May 16, 2020 at 0:05 | review | Reopen votes | |||
| May 18, 2020 at 9:54 | |||||
| May 15, 2020 at 23:55 | comment | added | Russell McMahon♦ | Option 1 is lethally dangerous. It can easily kill you and/or your equipment. It has its place in well controlled conditions but chances are the conditions you have may not be controlled enough. | As Justme touches on - if you reverse phase and neutral (which can happen unexpectedly for various reasons in real life) and something will die if the output is grounded. If the output is not grounded the AINxN is at mains voltage - and something will probably die. It may be you. | |
| May 15, 2020 at 23:51 | comment | added | Russell McMahon♦ | @Drakejest - Despite Andy closing this question as a duplicate it is not a duplicate. I suggest that you ask the moderators to reopen the question and/or rewrite it to focus on the new material and/or write a new question with the new material in it and a link to the old question. | |
| May 15, 2020 at 23:18 | history | closed | Andy aka transformer Users with the transformer badge or a synonym can single-handedly close transformer questions as duplicates and reopen them as needed. | Duplicate of Building a voltage transformer circuit for sensing mains voltage | |
| May 15, 2020 at 20:29 | answer | added | Bimpelrekkie | timeline score: 3 | |
| May 15, 2020 at 20:26 | comment | added | Justme | Why do you want to measure mains to begin with? You have so many questions regarding grounding that indicate it may not be safe for you to measure it. If in the first circuit you accidentally swap neutral and live, you short live to earth. The three resistors are in series, because a single resistor can't handle the mains voltage all by itself. And the circuit will be live. The second circuit is much safer, you can use a mains transformer bought from a store. | |
| May 15, 2020 at 20:11 | history | asked | DrakeJest | CC BY-SA 4.0 |