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Circuit Mobile Phone Battery Charger

Senin, 19 Maret 2012 by skemarangkaian

This post share about Mobile Phone charger circuits, previously you can see other Phone Battery Charger Circuit  or Charger Circuit . This Charger ciruit use to charging phone battery using IC 7805 for plus voltage regulator or & 7905 for min voltage regulator. Below is a schematic circuit adapter, power supply, or battery charger (for gadgets, mobile phones, MP4player, smartphone) that is equipped with a 5V voltage stabilizer:

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Diode Bridge
diode bridge, known as a diode bridge is used for the rectifier circuit current (rectifier) from AC to DC. to make the diode bridge properly you need to know the type of diode to be used, to suit your needs. example: to make the power supply 12 Volt 3 ​​Ampere diode type 1N5401 is needed, for more detail how to choose the right type of diode to the adapter.

Voltage stabilizers are commonly used are the 78XX or 79XX type LM, XX indicates the maximum voltage output is generated. see the example in the circuit schematic above, to output 5 V is used type LM 7805. for other voltages must be adjusted to the transformer and its stabilizer IC.

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LM350 12 Volt Battery Charger

Kamis, 08 Maret 2012 by skemarangkaian

The battery circuit scheme is designed as a source of constant voltage with negative temperature coefficient. Transistor Q1 (BD 140) is used as a temperature sensor. transistor Q2 is used to prevent the battery from discharging through R1 when electrical power is unavailable. Charging circuit is designed based on the LM350 voltage regulator IC. The output voltage of the charger can be adjusted between 13-15 V by varying the POT R6.


LM350 will try to keep the voltage drop between the input pin and output pin at a constant value of 1.25V. So there will be a constant current flow through resistor R1. Q1 act here as a temperature sensor with the help of R6/R3/R4 components that are more or less controls the base current of Q1. As connection emitter / base of transistor Q1, the same as other semiconductors, containing the temperature coefficient of-2mV / ° C, the voltage output will also show a negative temperature coefficient. This one is just a factor of 4 large, because the variation of the emitter / base of Q1 is multiplied by a factor of division P1/R3/R4. This leads to some-8mV / ° C. LED will light whenever power is available.

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Ultra Fast Battery charger circuit

Selasa, 06 Maret 2012 by skemarangkaian

Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad] which will be discussed in this article is Fast NiCad Battery Charger, called the Ultra Fast Charger Battery Charger NiCad because it can make filling fast NiCad Batteries Cell. A battery charger in Desai has a fast charging capabilities such as Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad] on this article shall be equipped with some ability to protect the battery and charger circuit itself.

Feature owned by Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad] 

  • Autoshut-off, is the ability of the charger to stop charging current to a NiCad battery if the capacity NiCad battery is fully charged.
  • Polarity Protection, with the existence of this capability so if there are mounting the battery on the charger upside yan can be known.
  • Constant output voltage
  • Output currents enough to fill some NiCad batteries at once in parallel.
  • Short Circuit Protection, with the existence of this protection circuit so if there is short-circuit caused by a battery and a charger circuit itself will not damage the other parts are not damaged.
  • Series Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad]



Image series above is a series of schematic drawings for Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad]. Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad] can be used for 8 to 10 NiCad batteries at once with 12 volt output voltage and max current is 3.5 A. The main components in the circuit of Ultra Fast Battery Chager for Nickel-Cadmium battery cells [NiCad] is UC3843 and MC34181. UC3843 chip is a voltage regulator and M34181 is a JFET OpAmp with characteristic low offset voltage, input impedance is very high. MC34181 serves as a voltage comparator.

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Powerful Battery Charger Circuit

Rabu, 29 Februari 2012 by skemarangkaian

Series NIMH Battery Charger with IC LT4060 is a NIMH battery charger is powerful, effective and efficient. Featur owned by IC LT4060 is a specialization of a NIMH battery charger. NIMH Battery Charger with IC LT4060 can perform safely charging NIMH batteries because it comes with a battery temperature protection is in charge and the peak level detection system of the battery voltage is in charge. 


Battery temperature protection system from the excessive use of NTC temperature sensor. Series NIMH Battery Charger with IC LT4060 also features a charging indicator that will light up when charging and will die when the battery is full. IC 4060 used in this NIMH battery charger from Linear Technology is a production that is designed special for NIMH battery charger.

Image Series NIMH Battery Charger with IC LT4060

Description Series NIMH Battery Charger with IC LT4060
R2 potentiometer used for setting the maximum temperature (at set at the value of 4K)
LED D1 is a battery charging indicator
Charger Power Transistor (Q1) can be replaced with PNP transistors are capable of a current of 3A - 5A

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Battery Charger based on AVR ATMega 8535

by skemarangkaian

Battery Charger in general can be interpreted as a means to recharge the battery charge. Principles of good charger circuit is capable of providing resources to perform effectively charging the battery, efficient and safe. AVR-Based Battery Charger ATMega 8535 With LCD Display This is an idea that had just emerged from the author.
In AVR-Based Battery Charger design ATMega 8535 With LCD Display is using AVR microcontroller processor charger with ATMega 8535, process the data viewer charger with LCD, a safety from a hot temperature with the temperature sensor LM35 and several buttons for setting the charger. And component power charger Battery Charger Based on AVR ATMega 8535 With LCD Display is a FET.
Click to view larger

Function-Based Battery Charger Part Series AVR ATMega 8535 With LCD Display
ATMega 8535 AVR microcontroller serves as the controlling process of the charger.
Button S1 - S5 as input data charger settings (setting the current, maximum temperature, peak voltage batteries)
LM35 Temperature Sensor function as heat sensors in the battery during charge.
LCD Display function to display data and display settings charger battery charger process measurement data.
FET serves as a power charger that will flow into the battery charging current.

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Adapter, power supply and charger circuit

Minggu, 01 Januari 2012 by skemarangkaian

Basically adapter, power supply and charger circuit has a similar construction which consists of a transformer, rectifier (rectifier) and smoothing the voltage. For there is usually an additional power supply voltage stabilizer of voltage regulator IC LM series 78XX or 79XX .
Below is a schematic circuit adapter, power supply, or battery charger (for gadgets, mobile phones, MP4player, smartphone) that is equipped with a 5V voltage stabilizer:

adapter, power supply and charger circuit
Adapter, power supply and charger circuit

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1.3V DC to 12.2V DC Regulator Power Supply

Kamis, 19 Mei 2011 by skemarangkaian

Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current.
In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made her basiskan regulator IC LM723 is a pretty legendary.




1.3V DC to 12.2V DC Regulator Power Supply


Description:

R2 to set the output voltage. The maximum current is determined by R3, over-current protection circuit inside the LM723 to detect the voltage on R3, if it reaches 0.65 V, the voltage output will be off her. So the current through R3 can not exceed 0.65 / R3 although output short-circuit in his.



C3 and C4 are ceramic capacitors, as much as possible directly soldered to the PCB, this is because the LM723 is prone to oscillation that is not cool.



LM723 works with 9.5V input voltage to 40 V DC and the LM723 can generate its own current of 150mA when the output voltage is not more than 6-7V under input voltage.



Specifications:

Output (value estimated):



Vmin = (R4 + R5) / (R5 * 1.3)

Vmax = (7.15 / R5) * (R4 + R5)



Imax = 0.65/R3



Max. Power on R3: 0.42/R3



Min. DC Input Voltage (pin 12 to pin 7): Vmax + 5



Component List:

B1 40V/2.5A

C1 2200uF (3300uF even better)

C2 4.7uF

C3 100nF

C4 1NF

C5 330nF

C6 100uF

Green LED D1

D2 1N4003

F1 0.2A F

F2 2A M

IC1 LM723 (in a DIL14 plastic package)

R1 1k

R2 Pot. 5k

R3 0.56R/2W



R4 3.3k

R5 4.7k

S1 250V/1A

T1 2N3055 on a heatsink 5K / W

TR1 220V/17V/1.5



source [link] 

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Flash Lights with HT2014L

by skemarangkaian

Flash Lights with HT2014L




This scheme is almost the same with a flash light with LM3909. In this scheme only requires IC HT2014L as a leader, and a resistor and LED. For voltage here need ration power around 4.5 V. You can apply this series to a wider scale in comparing the use IC LM3909. For the scheme are below:



flash lights circuit

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Automatic Battery Charger Circuit

Minggu, 15 Mei 2011 by skemarangkaian

Basically the circuit designed above have a very simple way of working, where the circuit is designed so that does not happen short circuit or short circuit between the voltage supply with batteries that will be in-charge.


Automatic Battery Charger Circuit

 It is true that if any one wants to try to direct mengghubungkan between supply with batteries then the batteries can be sure will be filled. But the current flowing through a charged battery can not be controlled and if the battery is full, the batteries will be damaged or worn out if it remains on the short circuit condition.

Working Principle Battery Charger

By the time we put an empty battery charging terminals, transistor Q1 will be activated immediately because the current flows through R1 and would trigger a transistor Q1 base. In this condition the flow that would fill the batteries mostly comes from the collector of Q1 is connected directly to the positive terminal of supply. Then during the charging process increases the battery voltage will increase the current flowing in Q2 base via 10 Kohm R5, VR1 and diode D2. VR1 is a component that is used as an initial calibration to determine the exact position in the planning process of switching circuit. For VR1 you can use a trimpot or potensio according to your taste. At the beginning of filling, arrange potensio at position D3 LED indicators on the condition of death, and the current flowing into the collector of Q1 is not too big and not too small.

If the battery is fully charged, the LED indicator will light up automatically because of an increase in voltage on the battery charge will cause the increase of current flowing at the base of transistor Q2 and will terminate the charging cycle due to transistor Q1 having a cut-off due to lack of base current. Why on condition Q1 base current will experience a shortage of this is because almost all the current flowing in R1 10 Kohm will switch to a diode D1 which is logically connected directly with ground experience due Q2 saturated.
.
Component List
1. Resistors: R1 (10 Kohm), R2 (680 ohms), R3 (100 Kohm), R5 (10 Kohm) and VR1 (Potensio / trimpot = 100 Kohm)
2. Diodes: D1 & D2 (IN4002) and D3 (Led)
3. Transistors: Q1 and Q2 (2N3904)
4. 9 volt power supply

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