Still, it is wise to connect all electronics to a surge protector or UPS to keep them from being damaged by electrical surges. After all, it is much cheaper to replace a power supply than an entire computer. Some include fuses that will blow if the surge is too great, protecting the rest of the equipment. Therefore, power supplies are designed to handle fluctuations in electrical current and still provide a regulated or consistent power output. For example, if the transformer secondary is rated at 12 volts then the acquired 12 volts from the transformer secondary will be a 12 volt AC across the relevant wires. Since the power supply is the first place an electronic device receives electricity, it is also the most vulnerable to power surges and spikes. The transformer is one of the main components in a power supply circuit because we need to convert the higher voltage available in the power point into a lower voltage we needed. Both of these designs allow the main device to be smaller or sleeker by moving the power supply outside the unit. Some power supplies, often called "AC adaptors," are connected directly to the plug (which can make them difficult to plug in where space is limited). They often include another cable that connects the device to the power supply. These power supplies are connected directly to the cable that plugs into the wall.
![apower power supply apower power supply](http://www.yp-static.com.cn/uploads/allimg/190127/1-1Z12GI648.jpg)
For example, some monitors and external hard drives have power supplies that reside outside the main unit. While most computers have internal power supplies, many electronic devices use external ones. Of course, you should never have to remove the power supply, so it's best to leave it in the case. If you were to remove the power supply, it would look like a metal box with a fan inside and some cables attached to it. Without opening your computer, this is typically the only part of the power supply you will see. You can locate the power supply on a system unit by simply finding the input where the power cord is plugged in. The power supply an integral part of any computer and must function correctly for the rest of the components to work.
![apower power supply apower power supply](https://i.ytimg.com/vi/uraPWaeAgYA/maxresdefault.jpg)
It also regulates the voltage to an adequate amount, which allows the computer to run smoothly without overheating. It receives power from an electrical outlet and converts the current from AC (alternating current) to DC (direct current), which is what the computer requires. David’s Power Supply Setting With 4.A power supply is a hardware component that supplies power to an electrical device. You can build a power supply with CC and CV modes for yourself if you don’t have a budget to buy a ready made one. hmm what a waste of hardware (burn baby burn) User 306444 6449 posts. You can read the following Q&A in electronics.stackexchange to learn what constant current and voltage modes mean. This shipment of PSU has been tested by manufacturer which based on Intel Q9300, Asus P5Q-Pro, 2 x Asus 4870, 8GB G.Skill RAM, 4xSATA HDD, 1x1394 Device, 1xDVD RW, 5xUSB Devices. You can perform this 2-stage charging using your power supply, but it must supports CC(Constant Current) and CV(Constant Voltage) modes. This tutorial applies to all Lithium Ion and Lithium Polymer batteries not only NCR18650B.
![apower power supply apower power supply](https://images-na.ssl-images-amazon.com/images/I/417sL5uGrDL._SL500_AC_SS350_.jpg)
In this stage, the current will naturally drop down, and the cutoff is typically about 10% of charging current so it’s about 170mA. Charging consists of two stages, first one is the constant current stage where you must supply a 1625mA constant current and when the battery voltage reaches 4.20V, the second stage starts, which is the constant voltage stage.
![apower power supply apower power supply](https://ae01.alicdn.com/kf/HTB1pE.BSXXXXXX5XFXXq6xXFXXXz/3V-1A-1000mA-AC-100V-240V-Converter-power-Adapter-Charger-To-DC-3V1-APower-Supply-EU.jpg)
You can find the charging diagram in NCR18650B battery datasheet.Īccording to the datasheet, the charging current is 1625mA and the charging voltage is 4.2V. Even with the presence of protection circuit in Lithium Ion battery. He used NCR18650B in his tutorial, a 3.6V 3400mAh Lithium Ion battery from Panasonic.ĭavid warned us that charging this type of battery is quite dangerous if we didn’t do it in the correct way.
#Apower power supply how to
The purpose of this tutorial is to learn how to use your lab power supply to charge your Lithium Ion battery when you don’t have a special charger circuit to do so. David Jones has another useful video tutorial about how to safely charge Lithium Ion and Lithium Polymer batteries with a bench power supply.