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You are wagging the wrong end of the dog. A power supply that is constant voltage (the regular ones) may have a LIMIT of 3A at a certain voltage. The reduce the current you either turn down the voltage or add a resistor E=IR to the circuit.
AnswerHow would I do it?I would put together an ancillary, current limiting, circuit which could be connected across the output.
What else can I help you with?
Can you use a 12 volts 3 amp power supply on a 12 volt 500 milliamp device?
Your power supply can supply 1 A, but your device requires 2 A. So the power supply will be overloaded. So the simple answer is no.
Will a 12 v 5amp power supply burn up your 12 v 1 amp device?
No ~ the power supply is capable of supplying 5 Amps, but the device will only draw 1 Amp. Therefore the power supply can still safely supply another 4 Amps if required.AnswerIt's important to understand that the '5 A' referred to in the specification of your power supply is its capacity -the actual current drawn from the power supply is determined by the load you attach to it. So, if your load requires only 1 A, then that's how much current will be drawn from the power supply.
Is there any amplifer which will work without an external current source?
An amp with no power supply? No. Can't be done. An amplifier increases the current of the input signal, and to do so it needs power to do it with.
What is the current called that is delivered by a power supply?
It's called, `current`. It's rated in amps, milliamps, microamps, etc., representing a fraction of an amp. The simple explanation is that the voltage is the `carrier`, and the current is the `power` which actually provides the energy to do the work.
Can you use a 12 volt 5 amp power supply on a 12 volt 2 amp device?
Absolutely.As long as the converter (or any power source) is rated at the same voltage, with more current than the device needs.Sometimes, a device may have a higher initial current surge than it's operating current, keep this in mind. Some converters do a good job handling momentary surge, some don't.
Can you use a 12 volts 3 amp power supply on a 12 volt 500 milliamp device?
Your power supply can supply 1 A, but your device requires 2 A. So the power supply will be overloaded. So the simple answer is no.
Will a 12 v 5amp power supply burn up your 12 v 1 amp device?
No ~ the power supply is capable of supplying 5 Amps, but the device will only draw 1 Amp. Therefore the power supply can still safely supply another 4 Amps if required.AnswerIt's important to understand that the '5 A' referred to in the specification of your power supply is its capacity -the actual current drawn from the power supply is determined by the load you attach to it. So, if your load requires only 1 A, then that's how much current will be drawn from the power supply.
Is there any amplifer which will work without an external current source?
An amp with no power supply? No. Can't be done. An amplifier increases the current of the input signal, and to do so it needs power to do it with.
What happens if a 2 amp power supply is used on a circuit needing 200 mA?
Everything would work as designed if you used a 2 amp power supply for a 200 ma circuit.It's important to not go OVER the designed capacity of the power supply, and in fact, it's a good idea to make sure the power supply has at least double the capacity of the load current.
Can you have a 15 amp appliance on a 32 amp supply?
Yes, providing the phase is the same. but you can't do the other way around, or breaker will immediately pop, or fuse will blow.
What does Volt-Amp mean?
A 'volt ampere' (not 'volt amp'!) is the unit for theapparent power of a load in an a.c. circuit. It is simply the product of the supply voltage and the load current.
How much current in amps is needed to power a 3kw amplifier at 1500 volts?
It depends on what kind of amp it is. Is it an audio amp or an rf amp . . A 3 kW audio amp would draw about 300 watts on average at most, so with a good reservoir capacitor the supply current would be 0.2 amps. A 3 kW rf amp for AM radio would draw about 4500 watts so the supply current would be 3 amps.
Can I use a 3amp supply on a 2amp supply?
Yes, you can use a 3-amp power supply on a device that requires a 2-amp supply, as long as the voltage matches. The 3-amp supply can provide the necessary current without overloading the device. However, the device will only draw the current it needs (2 amps), so there’s no risk of damage from the higher amperage. Just ensure that the voltage rating is correct to avoid potential issues.
Why does an amplifier need a power supply?
The power supply in either a guitar amplifier or in a professional sound amp reduces the 110v alternating current to a direct current. Also it reduces the voltage that can be used by the speakers, usually 12+ volts. Also if there where no power supply and there could be a possible way of reducing the voltage that could be used in the same was a direct current, you would here a constant phasing type noise from the current alternating. A power supply unit converts power that can be used in correctly in sound frequencies.
What is the current called that is delivered by a power supply?
It's called, `current`. It's rated in amps, milliamps, microamps, etc., representing a fraction of an amp. The simple explanation is that the voltage is the `carrier`, and the current is the `power` which actually provides the energy to do the work.
Can you use 1 amp power supply for 1.5 amp device?
The simple answer is, No. But I'll give you the long answer, too. The power rating of most devices is the maximum power used under unusual circumstances. Most devices, unless it's something like a light bulb which is either on or off, don't use their max power 99% of the time. If you protect the circuit with a 1.0 amp fuse you protect your power supply and device and you can safely see if it works.
Can you use 5 volts 1.2 amp power supply on 5 volts 3.0 amp device?
No you can not. The power supply output of 1.2 amps is under sized. You would need to have a power supply of 3 amps or larger.
