How do I know what size DC plug I need?
Listing of DC coaxial connectors Connector size is often listed in the format OD (outer diameter) × ID (inner diameter) × L (length of barrel) and expressed in millimeters. Designations may vary between manufacturers. Coaxial plugs that have a male center pin will have another measurement, Center Pin Diameter (CPD).
What is DC power supply?
DC or Direct Current is the other type of electricity used in various applications. All AC-DC power supplies have rectifiers built into them and transformers to raise or lower voltage levels where necessary. Rectifiers are the components in power supplies that convert AC power to DC.
What should I consider when choosing a power supply?
The first thing to think about when choosing (or building) a power supply is the voltage. What voltage does your device need? This one is pretty simple. If your device needs 9V, you need a 9V power supply. If your device needs 5V, you need a 5V supply.
What’s the minimum load for a DC power supply?
Some power supplies, generally older switchers, have a minimum load requirement. This is usually 10% of full rated output current. For example, a 12 volt 2 amp supply with a minimum load requirement of 10% isn’t guaranteed to work right unless you load it with at least 200 mA.
What kind of power supply do I need for a phone charger?
The charger will set the voltage of the two data lines to a certain level to tell the phone which current rate it should use. If you have a few devices of various voltages, i suggest to use a variable power supply from say DC 0V to 30V or more. You can also build your own variable power supply.
What kind of power supply do I need for unlabeled device?
For example, if a unlabeled device was powered from a 9 V and 1 A supply, you can replace it with a 9 V and 1 or more amp supply. The above gives the basics of how to pick a power supply for some device.