My Circuit

Here is a circuit of mobile phone charger.The main part of the circuit mobile cellphone charger is timer IC NE555, used to charge and monitor the voltage level. IC1 get control voltage to pin 5 by zener diode ZD1­. Threshold pin 6 and trigger pin 2 is supplied with a voltage set by VR1 and VR2 respectively. The trigger pin 2 of IC1 is below 1/3VCC when discharge battery is connected to the circuit as a result flip-flop of IC1 is switched on to take output pin 3 high. The process is reversed when battery is fully charged of charged battery is connected. Here transistor T1 used to enhance the charging current from output pin 3 of IC1. Adjust potentiometer VR1 and VR2 as per require. PARTS LIST Resistors R1 = 390 Ω R2 = 680 Ω R3 = 39 Ω/1W R4 = 27 KΩ R5 = 47 KΩ R6 = 3.3 KΩ R7 = 100 Ω/1W VR1, VR2 = 20 KΩ  Capacitors C1 = 0.001 µF (ceramic disc) C2 = 0.01 µF (ceramic disc) C3 = 4.7 µF/25V (Electrolytic )  Semiconductors IC1 = NE555 timer IC T1 = SL100 or any Medium power general...

Battery Charger This circuit can be charged the 12 nicad battery , and the circut charger at 75mA until  until the battery is fully , when the battery is fully the voltage to be down . This charge can charged fully in a hour , because the charge can't quickly charged , But the charge can stabilized output voltage. See this charger schematic below :

This is a smart battery charger can protect your vehicle's battery from failing and will prolong its life – they're fully automatic so you can connect and forget.

This battery charger circuit differs from the norm in a number of ways, all of which make it difficult to understand. For this reason, I do not recommend it for the beginner. Repairing /revamping a dead charger What I started with was an inoperative 12amp battery charger. In hope of repairing it, I traced out the circuit, but did not like what I found—poor circuit design. So what I had to start with was an enclosure, ammeter, thermal overload interrupter, and center-tapped transformer all designed for battery charger application. Since the maximum current delivered by the unit is a function of the transformer internal impedance, I recommend that the readers use the same type of transformer. If you are a good pack-rat (like me), you may already have a dead charger—or you can be on the lookout for one. 12V Battery Charger Schematic SCR (Thyristor) Rectifiers First of all, the two SCRs (silicon controlled rectifiers or thyristors) are connected with their anodes (stud or tab) grounded—thi...

This circuit is for a temperature controlled constant current battery charger. It works with NICD, NIMH, and other rechargeable cells. The circuit works on the principle that most rechargeable batteries show an increase in temperature when the cells becomes fully charged. Overcharging is one of the main causes of short cell life, hot cells pop their internal seals and vent out electrolyte. As cells dry out, they lose capacity. Theory The transformer, bridge rectifier, and 1000uF capacitor provide around 22 Volts of DC power to run the rest of the circuit. The 7812 regulator drops this to 12V to run the 311 comparator and 4011 nand gates. The start switch is pressed to start the charging cycle. This causes the two 4011 nand gates, which are wired as an r-s flip-flop, to go into the charging mode. The Red LED is lit, and the VMOS FET current switch is turned on. Charging current runs though the battery pack. If the battery starts out warmer than the reference temperature, the circuit wil...

Here are a simple circuit of battery charger with extends lead-acid battery life. The circuit provides a first charging voltage of 2.5 V per cell at 25°C to rapidly charge a battery. The charging current decreases as the battery charges, and when the current drops to 180 mA, the charging circuit reduces the output voltage to 2.35 V per cell, floating the battery in a fully charged state.   Charger Extends Lead-Acid Battery Life Circuit Diagram: This lower voltage prevents the battery from overcharging, which would shorten its life. The LM301A compares the voltage drop across R1 with an 18-mV reference set by R2. The comparator`s output controls the voltage regulator, forcing it to produce the lower float voltage when the battery-chaiging current passing through R1 drops below 180 mA. the 150-mV difference between the charge and float voltages is set by the ratio of R3 to R4. The LEDs show the state of the circuit.

This is very simple charger 9V - 30V battery charger with main operation by IC LM317L and 2N222 transistor. Direct input DC voltage , the recomended capacitor is 1000uf. It can be filtering Output voltage and make long-lasting battery. And easy to make this circuit , without using the PCB would be able to. See the Charger Schematic and troubleshooting below : If it can't working , then the mistakes and keeping the following : Check input voltage, whether working or not. Check the installation of the pins of components. Chek transistor , at input voltage , base , and output voltage. Check IC input voltage and output voltage , there or not. Thank  you 4 visiting my blog.

Why you may need a zipcharge quick charger? With so many devices around these days, making sure they have enough juice to run on is essential wherever we go. The Zipcharge Quick Charger aims to help you out with that, where it comes in the form of a rechargeable power stick that takes a mere 15 minutes of charging to provide your iPod with another 20 hours of audio playback, while you get 10 more hours of talk time. Now, these are all theoretical figures, so you might want to take it with a pinch of salt. How about a 60 second charge that offers 2 hours of playback on your iPod? Charging the sleek ZipCharge for a paltry 15 minutes will store enough oomph to give your iPod an extra 20 hours of playtime or your mobile phone an additional 10 hours of talk time. If you’re in a pant-trippingly awful rush, a 60 second charge whooshes in sufficient juice to power an iPod for 2 hours, a mobile phone for 8 hours, 2 Way Radio for 1 hour 20 mins or a camera for 80 photos. So how does it work? No...

Simple Train Mounted Camera Battery Charger circuit will keep the battery for a train mounted camera charged and will shut the camera off after a few seconds when power is no longer applied to the track. The circuit is designed for DCC systems and the battery is essentially used as a capacitor as it is not allowed to become discharged. The battery also controls the voltage to the camera as any current passed through R1 that is not needed by the camera is shunted through the battery . This is an inefficient but cheap way to control the voltage.  Train Mounted Camera Battery Charger Circuit Diagram

Here is a solar charger circuit that is used to charge Lead Acid or Ni-Cd batteries using the solar energy power. The circuit harvests solar energy to charge a 6 volt 4.5 Ah rechargeable battery for various applications. The charger has Voltage and Current regulation and Over voltage cut off facilities. Solar Charger Circuit Schematic Solar charger with current regulation and cut off. buy the components for this solar charger project Ready-Made Solar Charger – different ready-made solar battery chargers LM317 – 1.2V to 37V linear regulator BC548 – Bipolar Transistor NPN 30V To-92 Lead Acid Battery – 6V 4.5Ah Sealed The circuit uses a 12 volt solar panel and a variable voltage regulator IC LM 317. The solar panel consists of solar cells each rated at 1.2 volts. 12 volt DC is available from the panel to charge the battery. Charging current passes through D1 to the voltage regulator IC LM 317. By adjusting its Adjust pin, output voltage and current can be regulated. VR is placed between ...

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