# How Can I Power Two Motors with Different Requirements from One 110V AC Outlet?

• rolinger
In summary: Hello all. First thing I have to say is I don't understand much about power and electricity conversion rates. But I do have a need to have two different motors, each requiring a different power load, to run off of a single source AC 110 house outlet. I am looking for a cheap solution that will allow me to power both devices off of household 110v AC power but really have no idea on to go about doing this since this is my first project I have ever done that requires me to toy with power/electrical sources. I know I can go buy a 110AC to 12V (cigarette lighter) converter for $5, but that's the rolinger Hello all. First thing I have to say is I don't understand much about power and electricity conversion rates. But I do have a need to have two different motors, each requiring a different power load, to run off of a single source AC 110 house outlet. First device: Volts: 12, Amps: 3.3, uses a 12V car cigarette lighter (I assume this is DC power) Second device is a 2 speed motor: Watts: 37/27, Amps: 0.57/0.39 and runs off of standard 110v AC plug I am looking for a cheap solution that will allow me to power both devices off of household 110v AC power but really have no idea on to go about doing this since this is my first project I have ever done that requires me to toy with power/electrical sources. I know I can go buy a 110AC to 12V (cigarette lighter) converter for$5, but that's the kind that plugs into a wall outlet and would require some kind of mickey mouse solution that is unclean and probably not safe. I am looking for a solution that runs off of a single source that feeds both devices. Which means I would need to cut off the cigarette lighter adapter and used the exposed wires to connect directly to this power source.

Also, how do I determine the watt power level of the first device? I need to understand what the total watt power consumption, of both devices, would be.

Watts DC = Volts x amps so in your case it would be 12 Volts x 3.3 amps = 39.6 watts.

I don't think you are going to find a device that would supply power for both. I would just go with your \$5 converter and solder the wires to the terminals of your machine. Then of course, put plenty of electrical tape. The other machine could just plug directly in.

So is watts DC math any different from watts AC ?

Watts DC = Volts x amps (12 Volts x 3.3 amps = 39.6 watts)​

Would the second device simply be:

Watts AC = Volts x Amps (120 volts x 0.57 amps = 68.4 watts)​

The second device "advertises" 37 watts with a pull of 0.57 amps off of a standard 110AC outlet. But the math shows different with 120v AC x 0.57 amps = 68.4 watts. Something isn't adding up right.

Thanks.

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Perhaps there is an inefficiency such as power factor in the AC device.

Anyway, I'm not sure what you are really trying to do here. 110V Ac is wall power and 12V is a pretty standard power supply. If you the motor and a 12V power supply into a power strip, then you have it all connected together. I'm not really sure what you could do that would be more complex (or useful) than that.

When you buy a 120VAC to 12VDC converter make sure the current rating is atleast 3.3A. That's a decent size wall wart. Using a wall wart with that rating is probably one of the safer options you have, especially if you don't feel comfortable with 120VAC circuits.

Any time that I've run into a similar situation (quite a few times), I just run a dual outlet extension cord into the device housing and plug the adapter into one of the receptacles. Then a regular cord can be plugged into the other to run the AC stuff. For additional safety, if you're not sure of the power draws involved, use a power bar with an internal breaker.

I would like to know if there is an inverter to go from my household current to power my 12 v winch. I have a 4x4 super winch LP 8500 12 v DC 4.5 hp 3.3 kw motor.

rolinger said:
So is watts DC math any different from watts AC ?

Watts DC = Volts x amps (12 Volts x 3.3 amps = 39.6 watts)​

Would the second device simply be:

Watts AC = Volts x Amps (120 volts x 0.57 amps = 68.4 watts)​

The second device "advertises" 37 watts with a pull of 0.57 amps off of a standard 110AC outlet. But the math shows different with 120v AC x 0.57 amps = 68.4 watts. Something isn't adding up right.
AC Motors, with few exceptions, look inductive from the ac power lines. The 120v ac x 0.57 amps is 68.4 volt-amps or VA (reactive load).
Bob S

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## 1. How do I convert 110v AC to 12v DC?

To convert 110v AC to 12v DC, you will need a power supply or converter. This device will take the incoming 110v AC voltage and convert it to 12v DC, which is the type of voltage used in most electronic devices. You can purchase a power supply or converter from most electronics stores or online retailers.

## 2. What is the difference between AC and DC voltage?

AC stands for alternating current, which means the voltage continuously changes direction. This is the type of voltage used in most household outlets. DC stands for direct current, which means the voltage flows in only one direction. This is the type of voltage used in most electronic devices.

## 3. Why do I need to convert AC to DC?

Most electronic devices require DC voltage to function properly. AC voltage is used for power distribution because it is easier to transmit over long distances. Therefore, you need to convert AC to DC in order to use the voltage in your electronic devices.

## 4. Can I use a DC power supply for my AC devices?

No, you cannot use a DC power supply for your AC devices. AC and DC are two different types of voltage and are not interchangeable. Using the wrong type of voltage could damage your device or cause it to malfunction.

## 5. How do I know what type of power supply or converter to use?

The power supply or converter you need will depend on the specific voltage and amperage requirements of your electronic device. Make sure to check the specifications of your device and choose a power supply or converter that can handle the necessary voltage and amperage. It is always best to consult a professional or refer to the manufacturer's instructions if you are unsure.

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