Re: Making transformers
That's a good recommendation, I have bought a used copy online, and have downloaded a hookie copy until the doorstopper comes.
Doing a quick scan through and it seems already more digestible than A-Z.
Thanks for the heads up.
Rulycat
Badcaps Veteran
Last Activity: Today, 04:24 AM
Joined: 04-09-2010
Location: North England
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Re: Making transformers
Th3_uN1Qu3, that's a fantastic document. I must have read on here years ago, but it was so long ago, it slipped my mind.
I'm not professionally educated in this field at all so some of the information goes over my head but I do have a copy of Power Supplies A to Z (Although, a large amount of that goes over my head as well!)Leave a comment:
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Re: Making transformers
Looks good, I was struggling with where to get materials for a transformer as well like the core... as I don't have any PSUs lying around to cannibalise...Leave a comment:
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Re: I need a basic BIOS circuit
Is it a common BIOS chip like the attached picture? Are you trying to work out how the CR2032 powers the chip?...Leave a comment:
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Making transformers
During lockdown I decided to do more research on power supply theory, take this image for example:
[url]http://www.pavouk.org/hw/en_atxps.html[/url]
This is the DTK 200w schematic that seems common on the web... I would like to build a clone of an old design such as this to understand better how it works (we learn by doing, after all) I don't fully understand [B]why[/B] everything is the way it is, but that would be the fun of building a copy... the only thing I can't get my head around is, how do forum users on here go about building a transformer? Parts are easy... -
Re: Auto XS car battery charger how good is this charger
What are the temps like, could it be overheating if the magnet is used more often?Leave a comment:
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Re: What are these battries ?
Poundland sell 2 x 800mAh AAs. Penny pinching where you can't see it....Leave a comment:
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Re: "Magna" 300W ATX PSU (bad workmanship inside)
If they are identical it would be logical you could swap them... no?...Leave a comment:
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Re: "Magna" 300W ATX PSU (bad workmanship inside)
OK, so I should probably work out how the transformer is wound and which pins go where before doing anything again. I'll probably cut this one in half to see how it goes together.Leave a comment:
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Re: "Magna" 300W ATX PSU (bad workmanship inside)
That would be a good idea everell. Any ideas why the "new" transformer doesn't play nicely with the unit?Leave a comment:
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Re: eBay Chinese Electronic Clock Kit
Could I use the NPN tester in my multimeter to test it?Leave a comment:
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Re: "Magna" 300W ATX PSU (bad workmanship inside)
Doly noted stj
I replaced with a 35 size transformer as in the images attached - and used electrical tape to separate from the heatsinks (as I assumed it's not a good idea if those make contact with the heatsink)
PSU acts like it's dead except for 12V which produces 0.12V... I'm assuming the coil has too many windings as it's designed for a different PSU?...Leave a comment:
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Re: eBay Chinese Electronic Clock Kit
It's working! Didn't have to short the 7805.
You'll notice I replaced the cap there as well.
Does this mean the transistor isn't cooked?
Haven't installed the switch yet....Leave a comment:
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"Magna" 300W ATX PSU (bad workmanship inside)
Here is a Magna 300W ATX PSU, with plenty of bloated JEE and other caps:
Primaries are HEC 330uf 200V (will change these when I get some other caps)
Now I said on the other thread about the electronic clock kit I was waiting on some caps off my dad. Well here they are in action! and before I get roasted for bad repair work or it's dangerous etc, this is just a "Will it work?" project, using what I now have, which is Jamicon 85C caps, Fake Nichicons and Fake Panasonic FR caps!
At least the values are a lot larger.
The 470uf... -
Re: eBay Chinese Electronic Clock Kit
Sorry gents will do this just waiting on the 3xaa battery box to arrive.Leave a comment:
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So should I remove any components? Or just feed to the usual screw input with 3 x AAs?Leave a comment:
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Re: eBay Chinese Electronic Clock Kit
Pete
Still waiting on a replacement cap.Leave a comment:
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Re: Where to get cheap electronics books
That's ideal Pete
Leave a comment:
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Re: eBay Chinese Electronic Clock Kit
Yes it only has one band, but it came in the same strip as the others, so I think it is just a printing error.
Tbh I hoped I could just solder it all and it'd work...Leave a comment:
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Re: eBay Chinese Electronic Clock Kit
Got some crap caps at my dads house so for the sake of £2 lets see if anything else is goosed and if not then I'll put proper caps on it.Leave a comment:
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