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There are several ways. You can simply use a resistor to have a drop of 20v across it. You can use a diode with its negative edge connected to a 12 v supply and the positive edge as your input. When your input crosses 12 volts, the diode is turned on and causes a short circuit. If the output is also connected to the positive end of diode then it will never see a voltage above 12 volts. However, a lesser voltage is visible at the output then. This is somewhat the concept behind the clipper circuit made from diode. You can also convert this 32v dc to a digital value and then while converting it back to a 12v dc through DAC (here your DAC should ideally give a constant dc output).
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Can i use 9v dc with 12v dc?
No. 9 v is only 75% of 12 v.
Will an 12v 3a dc out put power adapter fry up a machine that is 12v 2a dc out put?
Youshould not parallel two DC output adaptors. If you meant to say that the second device needed an input of 12 V at 2 amps then the 12 V at 3 amp adapter will work as a power source.
How to make radio from auto like room radio 12v have anybody got tutorial?
I think you are asking how to power a 120 volt home radio on 12 volts. You will need to buy a converter that converts 120 V/AC to 12 V/DC. You can also buy converters that convert 12 V/DC to 120 V/AC. As one runs on DC current and the other runs on AC current, you cannot modify them. A converter is the solution.
Minimum cable size for 12v dc?
It depends on the current requirement. Specify an application or describe what is being powered by the 12 V to get an answer.
What are the five voltage produced by an ATX or BTX power supply?
+12V, -12V, +5V, -5V, +3.3V +12V, -12V, +5V, -5V, +3.3V
Am run a dc 12v 8amp fan by 150 Wat sollar penel?
Yes, the DC 12 v 8 amp fan can be operated by a 150 Watt solar panel.
12v DC 18va how many amps amps?
12 V DC, 18 VA (watts) how many amps? Formula: amperage I = power P (VA) divided by voltage V. So, amperage I = 18 watts / 12 volts = 0.083 amperes.
What voltage does a PCI slot use?
-12v+12v+5v+3.3v
Will using a transformer to convert 230V to 12V DC consume more energy than using a few capacitors and resistors without a transformer?
no, the transformer is much more efficient <><><> HOWEVER- a transformer only changes the voltage of AC current- it does not change it to DC. You will still need diodes or rectifiers. You can also use a motor/generator- a 230v AC motor turns a 12 v DC generator.
How 5v dc TTL signal convert in to Analog 0-10 v dc using buffer ckt?
you need a DAC, not just a buffer.
Is 12vac 5 a 60va all right to replace 12v 5 a?
Yes, 12 v 5 a is 60 va, and it does not matter if it is ac or dc voltage.
Can you use a 12v dc 1.6a power supply on devices that require 12v dc 50Ma?
You have to be careful because many small power supplies are poorly regulated, which means that they supply excessive voltage when there is a small current load. A 12 v supply might supply 16-17 v when the load is only 50 mA so unless you can check this it's best not to use it.
