rhehosat-power adaptor questions (modified version)

Discussion in 'General Electronics Chat' started by jikwan, Dec 15, 2014.

  1. jikwan

    Thread Starter New Member

    Dec 13, 2014
    7
    0
    greetings to all elec. techs.
    im a bit of a nerd with things electrical. very limited understanding
    could some one dispel my doubts a bit?

    1 im making a device that requires about 12v and rather than buy a power
    adaptor---i just use my laptop adaptor
    output 19.5v 3.9a with a round tube-like jack
    is it just a matter of buying the femail jack and soldering my 2 wires
    from the hho cell to the femail part---are there specific pos and neg
    on the femail jack?
    and can i put a rheostat on the wire to control the amount of volts
    im putting into the cell? would it damage my adaptor in any way?
    also i want to put an on off switch along the powerline

    2 also i will buy a small high pressure aquarium air pump with an
    attatched power plug i can put directly into the mains
    sometimes i might not want full high pressure air coming out
    if i use a rheostat ---would it harm the pumps engine? should
    it be a special kind of power controller?

    any advice appreciated
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    1. What type of battery? Voltage? charging current?

    2. A small AC speed controller like this one
     
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    are you planning to use the aquarium pump to compress the hho gas? most aquarium pumps have either pounts that spark, or brushed that also spark. hho and sparks can be a problem and go BOOM. and ac works much better for generating hho gas, it dosnt plate the electrodes like dc does.
     
  4. jikwan

    Thread Starter New Member

    Dec 13, 2014
    7
    0
    the speed controller---yes, its a voltage regulator. so would you advise me to get
    that instead of a common rheostat?

    there are no batteries involved in my project. the 12 volts i think i will need
    must come from mains power. the power adapter i will be using puts out 19 volts
    and i want to safetly reduce it (output) to 12v
     
  5. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    Oh, this is one of those HHO projects? You know, where you put in Kwh, $, and get out nothing....
     
  6. wayneh

    Expert

    Sep 9, 2010
    12,086
    3,024
    Yes! A rheostat is a poor solution for controlling any significant amount of power. They're great for controlling small amounts of power as information. So a typical circuit uses a small, cheap, low power potentiometer to control a power-handling circuit. The high-current or high-power path does not pass through the potentiometer.

    Why? Because a potentiometer that can handle more than a few watts is very expensive.
     
  7. jikwan

    Thread Starter New Member

    Dec 13, 2014
    7
    0
    its a secret project. classified---forum rules prevent me from describing it. thats ok with me
     
  8. jikwan

    Thread Starter New Member

    Dec 13, 2014
    7
    0
    thanks for that. i ll get a speed controller-voltage regulator.
    been here just a short time and got a lot of good info already. the post about
    pumping gas using electrical devices could have done me a lot of damage
     
Loading...