Using AC DC Desktop Power Adapters in Audio/Video Devices
There is an international standard as to which sections of the plugs provide what type and how much of a specific voltage. That is why there are so many sizes and shapes of all the different plugs (to meet all the different voltage requirements of various devices).
Generally speaking, if the plugs fits at all, then there is a pretty good chance that it will work, and there is only a VERY slight chance that it could actually cause any harm to your device.
However, to make sure that it will work for your device, you'll still have to look on the back of the adapter and check it's voltage output, and then compare that to the requirements of the device you want it to power.
You can also get inexpensive "universal" power adapters that come with lots of different plug fittings that you can use for all sorts of different devices (think Radio Shack, Best Buy, Walmart, etc.). Just try them all out and when you get to one that fits your device and works, you're in business.
That's pretty much all there is too it. Good luck!
Typically, not always, the center pin is the positive. You can test this with a voltmeter.
As long as the voltage is the same on the adapter and on the device (also, I have 9V DC and 9V AC adapters, do not mix these up) and be sure the current required is less than the amount that the adapter can source otherwise you risk overloading the power supply.
I go to thrift stores and pick up spare adapters all the time, if you know what you are doing you can cut off the plugs and match up the voltages. Saves a bit of money but if you do not have the experience it might be better to just buy a universal adapter.
Make sure the power adapter is not only the right voltage but is able to handle the needed power to supply your device with enough voltage to operate. The power formula P (watts) = I (ampere) x V (volts) shows you that if for example the needed power is 5 watts and the adapter delivers 12 volts, the adapter must be able to supply a current of at least 0,41 Amps (or 410 mA).
There's no risk in selecting an adapter that is able to deliver a current of 1 Amps ( mA) at 12 volts. The device is not harmed by this.
If the current is not enough, voltage might collapse causing slow charging of battery devices or inoperatibility of the device.
Using AC DC Desktop Power Adapters in Audio/Video Devices
Power 5V 2A AC Adapter Charger Replacement with 10 Tips
Input: 100-240V AC 50/60Hz
Output: DC 5V 2A(max)
Cable Cord Length: 9.85Ft (3m)
Color: Black
DC Connector: 5.5*2.1 mm
DC Polarity: Inner (+) Outside (-), Positive tip and negative sleeve.
Plug Type: US Plug
AC to DC 5v 2a power supplypower adapter Comes with a original 5.5x2.1mm DC tip
Package included：
1 X 5V 2A DC Power Supply/Adapter+1 Set of mutilple connectors tips (10 Pcs)
Widely Compatibility 5 volt dc power supply
Use for Raspberry Pi 3 Model B / Raspberry Pi 2 Model B / Raspberry Pi Zero / Raspberry Pi Model A A+ Model B B+ / ASUS Tinker Board / Power Bank Portable Charger
Suitable for TV box, attendance machine, KVM Switch, Bluetooth radio, Media MP3 MP4 Player, 5VScanner, optical transceiver, network camera, set-top box, router and more 5V 2A Devices.
Fit for Dericam P1/P2 series indoor home camera and most of other brand's indoor security camera with a 5V/2A power supply, compatible with Amcrest/ FDT and so on.
Our Universal AC DC Power Adapters are available in three options:
12V 2A/9V2A/5A2V, please check your equipment and choose the appropriate option to buy, thank you! ! !
Power 5V 2A AC Adapter Charger Replacement with 10 Tips
Input: 100-240V AC 50/60Hz
Output: DC 5V 2A(max)
Cable Cord Length: 9.85Ft (3m)
Color: Black
DC Connector: 5.5*2.1 mm
DC Polarity: Inner (+) Outside (-), Positive tip and negative sleeve.
Plug Type: US Plug
AC to DC 5v 2a power supplypower adapter Comes with a original 5.5x2.1mm DC tip
Package included：
1 X 5V 2A DC Power Supply/Adapter+1 Set of mutilple connectors tips (10 Pcs)
Widely Compatibility 5 volt dc power supply
Use for Raspberry Pi 3 Model B / Raspberry Pi 2 Model B / Raspberry Pi Zero / Raspberry Pi Model A A+ Model B B+ / ASUS Tinker Board / Power Bank Portable Charger
Suitable for TV box, attendance machine, KVM Switch, Bluetooth radio, Media MP3 MP4 Player, 5VScanner, optical transceiver, network camera, set-top box, router and more 5V 2A Devices.
Fit for Dericam P1/P2 series indoor home camera and most of other brand's indoor security camera with a 5V/2A power supply, compatible with Amcrest/ FDT and so on.
Our Universal AC DC Power Adapters are available in three options:
12V 2A/9V2A/5A2V, please check your equipment and choose the appropriate option to buy, thank you! ! !
