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What happens if I use the wrong power adapter?
If you’re lucky, nothing will happen, and no damage will occur. If you are unlucky, your device will be damaged. There’s a middle ground, too. Some laptops and other devices include polarity protection, which is essentially a fuse that burns out if you use the wrong polarity.
What happens when you charge something with the wrong voltage?
Using a charger with the wrong voltage rating can potentially damage your laptop. This is typically caused by too high voltage. But using a charger with too high current won’t damage your laptop. Using a charger with too low current rating might fry the power supply, but not the laptop.
Can I use a power supply with higher voltage?
Higher current (A) is okay because the device won’t use as much, but higher voltage (V) is going to “fry” it. Conversely, lower voltage is unlikely to cause damage since the device simply won’t have enough power, but lower current can cause trouble because the power supply cannot provide enough.
What happens if I use a 12V adapter on a 9V device?
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. Those pedals will work perfectly fine with a 12V adapter.
Do you need to know the polarity of a DC adapter?
When connecting the tip to a universal dc power adapter it is important to know the polarity required by the device you will be powering. To determine the required polarity you should look to the device manual, the original power adapter or the device itself.
What’s the difference between DC and DC power adapters?
Likewise, each electronic device is specifically designed to accept a certain DC input. The key is to match the DC output of the adapter to the DC input of your device. Determining the outputs and inputs of your adapters and devices is the hard part. Power adapters are a bit like canned food.
Why does a transformer not work on DC?
If the device uses a transformer to step down the voltage before rectifying it, it won’t work on DC as the transformer does not work on DC. If the device uses a CR dropper (some low power mains connected devices that do not need to be insulated from the mains), it won’t work on DC as the capacitor blocks DC.
Can a DC power supply switch to AC power?
Switching power supplies without a voltage doubler or active PFC may work on DC, but it would still depend on the power supply itself, but simple ones should work. Some AC power supply circuits have X-Cap discharge circuits which detect the absence of AC at the input and attempt to discharge the X-capacitor across the line.