Apower power supply
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You can read the following Q&A in electronics.stackexchange to learn what constant current and voltage modes mean. MFJ-4230DMP Power Supply for HAM Radio - TheSmokinApeNote: The MFJ-4230DMP was sent to me free of charge in exchange for this video review.In this video we t. 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. 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. 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.
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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.
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You could think of it as a surge protector for your computer, allowing you to plug everything you need power into. There are different power supply form factors, but ATX and LPX are the popular types found in most systems.David Jones has another useful video tutorial about how to safely charge Lithium Ion and Lithium Polymer batteries with a bench power supply. The power supply unit (PSU) simply powers the various parts of a desktop computer. When you are going to replace a malfunction power unit, you should choose the exact form factor that will go with the existing case of your computer. This is called Form factor, layout and dimensions of a unit. Power supplies available on the market have different size and shape that will fit into a particular type of computer case. Usually, power units comes with a case, however, it is a requirement to know the factors behind this unit before picking a new one. The most power demand parts such as Fan and drives need 12V to operate. Why different converted power? That is because all components of a computer system don’t need the same power.įor example, motherboard and cards use 3.3V. The power supply receives 120 or 230V and converts into 3.3V, 5.5V and 12V.
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Luck of proper supply of power will damage a computer system. Can be used to power any device with a DC voltage from 7 to 20 V and a power consumption of up to 3 A. The function of power unit is to convert the electrical power (AC) comes from wall socket to a suitable type and voltage (DC) so that each component of a computer works properly. You should give due attention like you do for other components when you choose or replace the power supply unit. It will be more easier and cheaper to replace than try to service it. 'DC' in this context means 'direct current.' Direct current is an alternative to alternating current, frequently shortened to 'AC.' Power supplies take energy from a power input and deliver it to a power output. Often this part of a computer gets failure and most of the time it is not serviceable. A DC power supply is a device that supplies electric energy of fixed polarity, either positive or negative. Though it is one of the neglected one compare to the other parts, power supply is a must for a system. Laptop parts used computers computer gadgetsĬomputer power supply is the electric source of all components of a computer.
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