I would like to split the 124 AC voltage so I have one part 112 AC and the other part 12vDC.

Community Chit Chat
1

I have 124 AC voltage. I would like to split the 124 AC voltage so I have one part 112 AC and the other part 12vDC. How would I go about doing this?

Thanks!

electric.png
electric.png512×516 8.41 KB

2

What exactly are you trying to do? You can’t split 124VAC into 112VAC and 12VDC like you show (I guess you could do it with a transformer and rectifier but without knowing the application, it’s hard to figure that out…) Is there a specific need for 112VAC (as opposed to 124VAC)? If the goal is to get both line voltage AC and 12v DC, the easiest will be to use a regular 12v dc power supply.

/mike

3

Here is a better example.

electric 2.png
electric 2.png648×516 18.2 KB

4

Please let us know exactly what you are doing as this is rather unusual.

  • Where is the 124V AC coming from

  • How stable is the voltage on the 124V AC

  • Does the “device that runs on 112V AC” require exactly 112V AC? Can it run on 124V AC instead?

  • How much current do you need at 112V AC? at 12V DC?

  • Is there some reason not to use a 120V AC to 12V DC power supply?

  • What are the 112V AC and 12V DC devices?

Note that anything designed to plug into a standard 120V wall outlet should work on 112V as well.

/mike

5

Thanks again guys.

I answered you questions bellow?

Question: I can obviously use a Rectifier to convert the AC to DC. But only want to divert 12vDC from the 124vAC and have 112vAC left over. What do you think the most efficient way would be to do this?

Please let us know exactly what you are doing as this is rather unusual.

  • Where is the 124V AC coming from : A standard home outlet, It was 110 but I increased it to 124 so it would be at 112ac volts when I drew 12 v Dc off of it.

  • How stable is the voltage on the 124V AC : Stable
    - Does the “device that runs on 112V AC” require exactly 112V AC? Can it run on 124V AC instead? : Can run on 110 - 120

    - How much current do you need at 112V AC? at 12V DC? :15-20 Amps
    - Is there some reason not to use a 120V AC to 12V DC power supply? : I wanted to have an ac voltage somewhere in between 110 and 120-
    What are the 112V AC and 12V DC devices? 112 is for standard household apliances. 12v is for a specific device that is made to run of 12v DC

    Note that anything designed to plug into a standard 120V wall outlet should work on 112V as well.

6

OK, it’s making more sense. I would take the incoming AC line and feed it to the standard household appliance directly. I would also feed it in parallel to a 120V AC to 12V DC power supply and use that to feed the specific 12V DC device. Depending on the current that you need at 12V, https://www.sparkfun.com/products/15313 https://www.sparkfun.com/products/15340 or https://www.sparkfun.com/products/14934 should work. All of those should work on the standard wall outlet voltage range.

/mike

7

Thanks Mike!