EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: NivagSwerdna on January 15, 2023, 11:30:32 am
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So I have my hands on a TIM 100 Block Isolating Transformer and would like to use it to power an old arcade CRT during repair...
It's https://www.farnell.com/datasheets/3160338.pdf (https://www.farnell.com/datasheets/3160338.pdf)
I only need 1 output at 110V....
Can I parallel the two secondaries? Are there any cases where this might ruin my day? I notice a dot on the schematic... should I connect the dotted wires?
Sorry for the ignorance
[attachimg=1]
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Yes, you can parallel them, but as you say yourself: watch out for polarity.
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Yeah it's tricky, but it can be done.
And for the dots, that's precisely the thing to do if you want this to work. Otherwise the two secondaries are going to cancel each other out.
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Cancelling out like matter and antimatter 😎
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Cancelling out like matter and antimatter 😎
:scared:
Not *quite* that bad, :phew: but unless you limit the supply current, that's an easy way to 'elect a pope!'*. :popcorn: I would strongly advise bringing the transformer up fed by a dim bulb tester, any time you are paralleling windings (or wiring primaries in series). See https://www.eevblog.com/forum/beginners/ask-determining-transformers-windings-phase/ (https://www.eevblog.com/forum/beginners/ask-determining-transformers-windings-phase/)
*AKA: 'let the magic smoke out'
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Connect together one end of each winding. Put a voltmeter between the other two ends. Power up the transformer. If you get zero volts or very close to it then you have the correct ends paired up. If you get about 220 volts then you haven't.