How Do I Know What Size Power Adapter I Need?

Choosing the right adapter specs. The general rule is to match the V and equal or beat the mAh, so if you are choosing an AC adapter to make sure you check the following, The adapter output V matches the rated input V of the device. The adapter output is greater or equal to the devices rated mAh or A.

How do I know what size power supply plug I have?

If your device uses a plug connector, you can find out what size plug your device needs by using some calipers and measuring the inside diameter as well the outside diameter.

How do I know what kind of power adapter I need?

The right AC adapter for your device is one with matching electrical ratings. The device’s input voltage and current must match the adapter’s output voltage and current. Check the device’s product label or user manual to see its rated voltage and current.

How do I know if my power adapter is compatible?

Any AC adapter is considered compatible with any device if it has all the following traits:

1. The voltage of the adapter has to be identical.
2. The amperage (amps) of the adapter has to be equal or greater than the device.
3. The polarity of the adapter has to be identical.

Can I use a 9V power supply on a 5V?

Of course it’s not alright to use a 9V adapter for a 5V device.

Can I use a 5V adapter to power a 4.5 V device?

I’ve run many 4.5v devices off a 5v USB power supply without problem. Most devices can tolerate it fine, because a brand new AA battery can deliver in excess of 1.6 volts, so the device is designed with some leeway.

Can I use 5V instead of 3V?

There is not such thing (or there should be no such thing) as a 3V USB anything… USB is 5V, and always will be. It is a standard that all devices must comply with. This means that you should not be able to find an AC adaptor to 3V with USB, If you do find it, don’t buy it.

Can I use 12V 3A for 12V 2a?

Yes. The 3A is the maximum current it can supply but it works fine delivering less current. For example, when this adapter is plugged but not connected to your device the current is zero but the voltage is 12V.

Can I use 12V adapter for 9V?

If you have a 12V adapter, you might wonder whether you can use it to power your 9V guitar pedals. In most cases, you cannot use a 12V adapter to power a 9V guitar pedal. Using a 12V adapter on a pedal designed to only handle 9V can completely destroy it.

Can I use 4.5 V instead of 5V?

It’ll work fine.

How do I match my laptop with a charger?

Look on the bottom of the laptop sometimes under the battery for the Volts and Amps. Look on the AC adaptors for the Volts and Amps. Just match them.

How do I choose the right power supply for my electronics?

Power Supply Voltage
If your device needs 9V, you need a 9V power supply. If your device needs 5V, you need a 5V supply. Also, if your device needs a DC voltage (which is the most common), you need a DC output from your power supply. If your device needs AC voltage, you need an AC output.

How do I know what wattage my power adapter is?

Look at the identification label on the side of your AC adapter. Write down the total number of volts and the total amperage the AC adapter uses. If these numbers are not listed on the side of the AC adapter, they will be listed in the manual that came with the device that uses the AC adapter.

How many watts is 5V 1A?

5 watts
However, it does indicate that the output is 5 volts at 1.1 amps (5V 1A), which means 5 watts (I realised this after a bit of learning about electricity).

How many watts is a 2.4 amp charger?

12watts
The higher power (2.4amps or 2.4A, 12watts or 12W) chargers are often required by modern phones and tablets in order to charge the device. Lesser powered USB chargers (1A or 5W) have been the standard for many years but they are only sufficient for charging smaller mobile devices.

Is it OK to use higher voltage adapter?

Using a higher current charger (than the laptop is rated for) will not cause damage to the laptop; as stated earlier. The device will only draw what it requires from the power pack.

Can I use a 7.5 V adapter for 9v?

However if the device is relying on the regulated voltage from the adaptor and has no internal circuit to control or limit overvoltage, then that 9v adapter may damage your device. That said, there are 7.5v devices designed with tolerances wide enough that the 9v you provide it won’t make any difference at all.

Can I use a 12 volt adapter on a 5 volt device?

The device will very likely burn out. In addition, depending on what the device is and the capacity of the 12V supply, connecting a 12V supply to a device rated 5V max could lead to a hazard – fire, explosion, etc.

Can I use a 5V adapter to power a 6V device?

The short answer is No. A 5V, 2A adapter gives 10W of power and the 6V,1A gives only 6W. That is only scraping the surface. Transistors are present in almost every electronic device today.

What is 5V 500ma?

It’s the current rating which is responsible for charging time of a battery. Also, 5volt, 1000mA can provide maximum power of 5 watts (ignoring the losses) whereas 5 volt, 500 mA can provide a maximum of 2.5 watts. By using 500 mA charge, battery will take double time to recharge itself as compared to 1000 mA.

What would happen to an electrical appliance that requires 3V if it were powered by 5V?

What would happen to an electrical appliance that requires 3V if it was powered by 5V cell or battery? The buzzer would not work as it requires at least 3 volts.The buzzer requires between 3 and 6 volts to work.