Re: 110 VAC to 20VDC Question

> Sorry, I suppose that would help. I have a coil that will heat up some
> fluid. I am trying to keep this as inexepensive as possible, all the
> parts and pieces totaling no more that $7 or $8 dollars. The
> transformer, while it sounds like it is the cheapest, might also be the
> most cumbersome and heavy, that is why I was looking for alternatives.
>
> Does this help?
>
> Thanks
Why does it have to be DC?.
Heaters are equally happy with AC, and this reduces the parts needed, to
just the transformer. Basically, if isolation is required, a transformer
will have to be involved (it is the only economic way of providing
isolation of this sort). Smaller transformers can be used, by increasing
the operating frequency, bu this adds the complexity of converting the
incoming power to DC, then chopping this at a higher frequency. If DC is
required, then rectification will have to be added, and if the voltage
needs to be smooth/stable, smoothing, and possibly regulation.
Normally if you look at things like low voltage halogen lighting, and fish
tank heaters, a simple transformer is used. Assuming there is some
reasonable current involved, except in very large production, you will not
get any other solution, down to the desired 'price point'. However the key
'missing data', is how many amps are involved...

Best Wishes



.

Relevant Pages

  • Re: Isolation Transformer and DC corrosion
    ... but the correct method of connecting an isolation ... to have to install an isolation transformer in our dock box. ... therefore all the underwater metal parts of the boat, ... Once the AC power supply to the boat has no ground connection, ...
    (rec.boats.electronics)
  • Re: whats everyone building these days?
    ... link obviously nicely wound his own ferrite core xformer; ... transporting the switching signal across the isolation barrier. ... I am gathering the parts necessary to build and test the transformer ... Inductor design and winding for beginners is a matter of much tedious ...
    (rec.audio.tubes)
  • Re: Isolation transformer
    ... electrically connected to the mains is a moot point. ... "In electronics testing, troubleshooting and servicing, an isolation ... transformer is a 1:1 power transformer which is used as a safety ... chassis of a TV, you will likely see sparks fly. ...
    (sci.electronics.basics)
  • Re: Isolation transformer
    ... "In electronics testing, troubleshooting and servicing, an isolation ... transformer is a 1:1 power transformer which is used as a safety ... expected "electrical connection to ground". ...
    (sci.electronics.basics)
  • Re: Hallicrafters S-38 lack of sensitivity on the HF bands
    ... The isolation transformer is a good idea, although the ham I mentioned about from the 30's was killed in a transformer operated rig, when the ac shorted out to ground in the transformer. ... I have now gotten to be pst middle age without any further shocking developments. ... caps clamped to the chassis. ...
    (rec.radio.amateur.boatanchors)
Quantcast