Charger Circuit Using LM 317 with Input 18V Battery

Here is a simple but effective battery charger circuit using IC LM 317.The circuit can be used to charge 12Vlead acid batteries.The circuit is very simple and can be easily assembled on a general purpose PCB. The heart of the circuit is IC LM 317 ,which is an adjustable voltage regulator IC.The pin 1 of the IC is the control pin which is used to control the charging voltage.The pin 2 is the output pin at which the charging voltage appears.The pin 3 is the input pin to which the regulated DC supply is given. The charging voltage and current is controlled by the Transistor Q1,resistor R1 and POT R5.when the battery is first connected to the charging terminals ,the current through R1 increases.This in turn increases the current and voltage...

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Datasheet IC Logic Often Used

2N3055 : COMPLEMENTARY SILICON POWER NPN-TRANSISTORS http://www.datasheetcatalog.org/datasheet/stmicroelectronics/4079.pdf CD4047: Low Power Monostable/Astable Multivibrator http://www.datasheetcatalog.org/datasheets/90/109077_DS.pdf 7400: Quad 2-Input NAND Gate  http://www.datasheetcatalog.org/datasheets/70/232209_DS.pdf 74LS04: Hex Inverting(NOT) Gates  http://www.datasheetcatalog.org/datasheets/70/375318_DS.pdf 74LS08: Quad 2-Input AND Gates http://www.datasheetcatalog.org/datasheets/70/375337_DS.pdf 74LS11: Triple 3-Input AND Gate http://www.datasheetcatalog.org/datasheets/50/232280_DS.pdf 74154: 4-Line to 16-Line Decoders/Demultiplexers http://www.datasheetcatalog.org/datasheets/120/236595_DS.pdf SN7425...

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How to Measure Current With a Microcontroller's ADC

Usually, Microcontrollers do not have specific ports for measuring currents, but they have ADC channels through which you can measure analog voltages of a certain range. This means a dc current can be indirectly measured by a microcontroller’s ADC channel by first converting the current into voltage. The simplest way of doing this is to place a resistance in series with the current path and measure the voltage drop across it. But hold on, if you place an additional resistance in the circuit, it will affect the original current. Therefore, we need to use a very small value resistance so that it’s effect in the circuit current won’t be significant. Resistors with values less than 1 Ω are available in electronics stores. Depending upon the amount...

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Smart Buying a Second-Hand Hardware (Tips)

When you wish to buy hardware or new PC components, you can get them easily. Some ways are usually conducted among others by visiting your shop or order them through the buying-selling websites online trusted. Unlike buying new hardware,  to buy a second hardware usually there are some of things to note and be done, because it is not impossible that the function hardware is not appropriate than necessary. It is intended that you do not "fooled" with the goods you buy later. Here are tips on buying a second hardware: 1. Check the market price of the second hardware This is the first step a buyer must do before making a transaction. When to buy a new product, you do not too confused with the market price of the product. The new product...

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Thermaltake Level 10 GT Snow with Three Super Large Fans

Level 10 GT is a top class chassis from Thermaltake. This time, Level 10 GT comes with a white bandage. The specifications are not much different than the series Level 10 GT previous , still with three super large 200 mm fans on the front and side for intake as well as a fan  at the top for exhaust. Fan's sized 140 mm also been added on the back side to help remove heat. As a sweetener view, three of 200 mm fans are equipped with LED features and Colorshift three colors (red, green, blue). This chassis/casing is also equipped with a good security system because System Security Lock feature to ensure the security of hardware in it. On the left side of the casing there is a knob to adjust the direction of the wind generated from the fan...

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AOC E2352PHZ with Convenient 3D System

The sleek design and elegant impression owned by AOC e2352Phz. At the back there are four holes that you can use if you want to put this monitor on the wall (wall mounting). Foot buffer feels sturdy when you put it on the table because of the use of strong plastic material. Still in the back, you can find built-in speaker with SRS WOW HD feature. This feature is rarely found in current monitor products, Interface is used quite complete. AOC provides a variety of options, such as audio-out port, mic-in, HDMI, D-Sub, DVI, and power port on the back. The main features are highlighted by the AOC e2352 is a passive 3D feature. For 3D feature is used  type of FPR  so glasses that are used no longer use a battery. To use the 3D mode...

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Cooler Master Cosmos II a Good Choice

Cosmos II with a super large size motherboard can accommodate a motherboard up to type XL-ATX and full support for dual-processor motherboard server class with a type of Server System Infrastructure (SSI) CEB and FEB. This casing  is also able to accommodate up to 13 hard disk. Two handles on the upper side is characteristic of this case will be retained and able to lift the load if the casing is filled full with components. On the side panel, you can open it by pressing the button on the back side and this casing can be opened to 90 degrees. Futuristic impression will be felt on the front panel. There are e-Sata port, two USB 3.0 ports, four 2.0 ports, audio jacks on the front side of the casing. At the top there are the power button,...

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Leadtek GTX 560 Ti Hurricane

This Graphics card GeForce 114 chipset Fermi with dual-fan  has a function to remove the heat generated. With the use of two heatpipes are made ​​of copper, this graphics card promises a good performance, especially at full load. Leadtek is quite creative in developing a cooling system. It can be seen from the size of heatpipe larger 2 mm from the reference version (6 mm). This innovation is indeed powerful enough to remove excess heat. Leadtek has increased the clock speed on the graphics card. NVIDIA's reference clock is 732 MHz, while Leadtek increase it up to 822 MHz . With support from DirectX 11, Leadtek GTX 560 Ti can make the gaming experience more real because it can display a realistic effect. Feature NVIDIA 3D Vision is also...

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The Working Principle of Power Supply

Perhaps many people or electronics hobbyist asked how the work of a power supply? Why wave generated can be straight vertical? voltage can be set and even can set the output current? Well, here I will discuss how it happened. Components are very important in making a power supply are: transformer, rectifier, filter and regulator. Below is a general flow diagram of a power supply. With the principle of magnetic induction, transformers reduce the voltage 220VAC to 30V, 18V, 12V and etc.. Based on the difference in the number of windings between the primary and secondary windings on the transformer, then the ratio of output voltage and input can be formulated as follows: Vs/Vp = Ns/Np After the voltage is reduced as expected, we have to...

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Inverter Energy Source

In essence, there’s a couple different types of electric powered energy inside Globe: DC (Strength) in addition to switching AC current (AC). DC actions continuously from the advantageous power write-up on the negative electric submit. Changing electric energy operates forwards and backwards concerning the some articles. Electricity current occur in Character and as well battery pack packages, though Heating and air conditioning pre-existing might be man-made plus items electrical energy above the average person energy electric company which usually makes it possible for person company in conjunction with features. Vehicle battery packs found a problem before once we acknowledged many people wished to functions usually AC-powered products...

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