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A number of ways. Assuming a typical DC power supply you could: 1) Increase the turns ratio (n) on the transformer. 120 to 24 is roughly 5:1 ratio. Making that a 10:1 ratio would provide 12V. #2 below would be required as well. 2) Change the voltage regulator. Whether it be a zener diode, or LM78xx regulator, it could be changed to provide 12V. 3) A voltage divider set of resistors. Using two equal-valued resistors, you could divide the voltage in half. A potentiometer at 50% accomplishes the same thing. Both options 2 and 3 alone reduce the voltage by dissipating the excess energy as heat, so they are the least efficient choice.
What else can I help you with?
How do you reduce a 230v ac transformer to produce 140v ac?
By using step-down transformer
What is the purpose of blow out coil with laminated core in ac power contactor?
The laminations reduce a core loss called Eddy Currents, which are set up in the core by the ever changing AC current.
Why it is incorrect to say the voltage at point x is 12volts?
Voltage is the electrical potential difference between two points.
Does DC adapter mean the device converts DC to ac or ac to DC?
An AC adapter adapts the device that one wants to power up to the AC line. That means it converts the AC line voltage to something that can be used by the device in question. An AC adapter converts AC to DC. (In contrast, a device that runs off DC and makes AC out of it is called an inverter. An example of an inverter is the device that plugs into a vehicle's cigarette lighter and has an outlet on the other end that will permit someone to plug something like a kitchen blender into it. Great for tailgating! Don't run your vehicle's battery down....) There are times when an AC adapter is the little plug-in-the-wall thingie that converts the AC line voltage to some lesser value of AC. There are a few devices out there (usually older ones) that used their AC adapters to step down the wall voltage (115 volts AC) to 24 volts AC, 18 volts AC, 9 volts AC, or anything like that. Some new sprinkler control timers use an adapter that is an AC -to-AC step down converter. By looking at the information on the adapter, the user can see what the primary voltage is (and it's almost invariably 115 volts AC or 120 volts AC - same, same for this application) and what the secondary voltage is. As stated, the secondary is almost always DC, and if it is, the polarity is almost always indicated as well. That's so a user can tell if that little round connector has positive on the inside and negative on the outside or the other way round. (It makes a lot of difference to the device on which it is used, as one might guess.)
Why capacitor used only in AC power system?
A capacitor is included in the circuit to act as a filter to reduce ripple voltage. ... filter circuitmay be built using two capacitors and an inductor: ...look at http://en.wikipedia.org/wiki/Reservoir_capacitor
Why dc inverted to ac?
Because inverter consisted of series functions which started from 12VOLTS BATTERY -OSCILLATOR - POWER AMPLIFIER-TRANSFORMER-OUTLET SOCKET.
How do you reduce a 230v ac transformer to produce 140v ac?
By using step-down transformer
How do you reduce effect of harmful gases in our surrounding?
We can reduce by not using AC ,refrigerator, sprays, etc
What size resistor is needed to drop 24 volts dc to 12volts dc?
Its dependent what will by rated power of the device (current).
What can cause horn not to blow on 1997 kia sportage when fuse and horn neither are bad?
Could be the relay or switch at steering wheel Check to see if there is 12volts coming from the fuse. If there is power (12volts)on both sides of the fuse, then it might possibly be the horn switch. Is there 12volts at the horn when the horn button is pushed?
AC reduce's car performance?
only when it is on, it causes slow acceleration
Why are electrodes applied to the fleshy part of limbs?
to reduce AC interference
How do you fix LCD TV scrolling hum bar?
Bad ground in your home. 1 bar is 60volts 2 bars is 120to volts.
How do you reduce 12 volts to 3.7 volts?
If the voltage is AC a transformer can be used.
How can you get 12volts supply from speaker?
You can not. Speakers do not supply a voltage they need a voltage to operate correctly.
What resistors are needed to convert 4.5volts to 12volts?
can't be done using just resistors
Can adding too much freon to ac unit cause harm?
First of all if you are asking this you should not be playing with your ac. To answer the question yes you will significantly reduce the life of your ac... as well as cause numerous other problems.
