Timeline for Using a twin secondary in place of centre tapped transformer
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Dec 4, 2017 at 16:30 | comment | added | bobflux | You're welcome, have a nice day! | |
| Dec 4, 2017 at 15:03 | comment | added | VinceClortho | Thanks again Peufeu - I can see now from the circuit diagram for the PSU I building will dictate polarity - many thanks again. Todays lesson learnt! | |
| Dec 4, 2017 at 12:55 | history | edited | bobflux | CC BY-SA 3.0 |
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| Dec 4, 2017 at 12:46 | comment | added | bobflux | They're AC, so what decides the positive or negative polarity is the rectifier bridge. What is important is that, with "0V" being the center tap, both windings give opposite AC voltagesrelative to 0Vo the diode bridge does full wave rectification. You can check with a scope, but also with a multimeter. You should have 24V AC between the two 12 terminals if wired correct, and 0V if one is wired wrong in this case both windings voltage will cancel and it would not work... | |
| Dec 4, 2017 at 11:33 | comment | added | VinceClortho | Last question relating to this - after connecting the two secondaries in series, how do I then determine which of the two remaining terminals is +12v, and which is -12v. Many thanks again. | |
| Dec 4, 2017 at 11:06 | comment | added | VinceClortho | That is massively helpful - I'm glad to hear I can recycle my existing transformer! Many thanks! | |
| Dec 4, 2017 at 10:35 | history | answered | bobflux | CC BY-SA 3.0 |