Is it possible to connect 3 wire voltage regulator to bridge rectifier

[Michael Cheng]

Another Voltage regulator I've seen is a 3 wire, 1 Live in, 1 live out and ground. Is this possible to connect to a bridge rectifier and how as there's no neutral ?

 

[SparkyChick]

It should be a full wave bridge rectifier. With some substantial smoothing caps after it (without doing calcs, I'd probably go for something like 3500uF at 16v, but there are calculations you can do to properly calculate the size required (this will be based on current).

I just found this with a Google search:-

High current adjustable power supply circuit, 0-30V 20A - https://www.eleccircuit.com/high-power-supply-regulater-0-30v-20a-by-lm338/

The search string I used was "how to build a high current low voltage regulator"

Without spending hundreds of pounds I don't believe you'll be able to buy anything off the shelf to meet your specific requirements. I found a bench power supply that would do it, but it was £700 + VAT.

I think you're going to need to learn to solder and how to use strip board (although due to the power requirements you won't be mounting too many components on that as it will vaporise the tracks) if you don't already.

I'd use a high power toroidal transformer (with an secondary winding somewhere in the region of 5v at 20A - which will probably be expensive) and a 20A bridge rectifier on the output, followed by some substantial smoothing capacitors and then possibly a circuit based on the one in that link.

Failing that, have a look at some of the power supplies on Banggood (if my spelling is correct) as there are some very high power units available as imports from China. But be warned, I've seen videos of some of these going up in smoke due to design/manufacturing flaws.

 

[SparkyChick]

I should add... the regulation you want is on the DC side. Anything that talks about live in, live out and neutral will be on the mains side of things which probably means you're sticking something connected to the mains in a load of water. If it fails in an unsafe manner you could end up with mains on the output.

Don't do it. Same reason I'd suggest for this application not using a switching supply (because there is a chance that if it fails you'll end up with mains coupled directly to the output).

For safety put a transformer between your equipment and the mains and ensure there is no coupling (earth or otherwise) between the low voltage side and the mains input.

 

[marconi]

I'd want the OP to provide a circuit diagram for the current set-up before any advice is provided. I fear from my study of the innards and what he has written in his first post that the 110 plate HHO (oxyhydrogen) gas production cell ( noting 110 X 2.3 = 253V) pictured at the bottom of the cabinet is galvanically connected to and energised directly from the mains via a bridge rectifier - if it is then IT IS VERY UNSAFE AND UNACCEPTABLE.

 

[SparkyChick]

I didn't watch the video, but I believe you're spot on.

Having watched it, if that's hydrogen bubbling through that flask... where's the oxygen going? If it's not dealt with sensibly could be an almighty bang.

 

[PEG]

Whenever i am assembling a complicated device,i ensure that no testing is done,using a neon screwdriver...

 

[Michael Cheng]

Oxygen and hydrogen is mixed together.

 

[grantr37]

Great minds... chips What did you have with yours? I had chicken

Something isn't right with this thread, strange goings on, you need a lot of power to separate hydrogen with electrolysis, it is inefficient, I know of an engineer who couldn't get backing for his design and he has a youtube channel with millions of views and tens of thousands of subscribers and that is his thing

 

[grantr37]

Great minds... chips What did you have with yours? I had chicken

Something isn't right with this thread, strange goings on, you need a lot of power to separate hydrogen with electrolysis, it is inefficient, I know of an engineer who couldn't get backing for his design and he has a youtube channel with millions of views and tens of thousands of subscribers and that is his thing

 

[grantr37]

Whenever i am assembling a complicated device,i ensure that no testing is done,using a neon screwdriver...

Whenever i am assembling a complicated device,i ensure that no testing is done,using a neon screwdriver...

Those screwdrivers are a liability, wet hands bang, more than the limit of the screwdriver/internal resistor bang (smoke) a good chance of a nasty shock... In the recycling bin is where it goes