Battery Charger Circuits

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Solar Powered Cell Phone Charger

The simple circuit below regulates the voltage from a 6v solar panel to a fixed +5v. That voltage can be fed to any cell phone or USB connected portable device, to charge its battery. The circuit uses a Reg113-5 voltage regulator from Texas Instruments. The tiny device can handle up to 400ma of charging current. I would suggest using a solar... .
BQ24105 Switch Mode Lead Acid Battery Charger

Switch mode circuits can implement the lead acid battery charger with a more efficient. It can be constructed using bq24105 battery charger controller. The.. .
Lead Acid Battery Charger Circuit

To charge lead-acid batteries we can use this circuit that consist of a current-limited power supply and a flyback converter topology. Here is the schematic.. .
Programmable Current and Voltage Regulator for Battery Charger

This is a programmable current and voltage regulator circuit. It consist of a voltage regulator with external current limitation. The variable resistor R2 is.. .
Power Path Management Battery Charger

Powering the system is required by many applications while charging the battery simultaneously. Interaction between the system and charger may result in a.. .
Very Simple Lead Acid Battery Charger with PB137 Regulator

This is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. The PB137 is used for lead acid battery charger circuit because it can give.. .
Travelers Cellphone Battery Charger

While traveling, charging of the mobile phone, cellphone battery is a big problem as power supply source is not generally accessible. Battery will go flat.. .
Build a USB Powered AA NiMH and NiCd Battery Charger

This project, which can charge a pair of AA Nickel Metal Hydride (NiMH) or Nickel Cadmium (NiCd) cells using a laptop`s USB port for power, arose to address part of that problem. (By the way, if you want to lighten your laptop load, take a look at the MoGo Mouse. ) Any USB port can supply 5V at up to 500mA. The USB standard specifies that a... .
battery charger circuits

Here we provided several schematic drawings of battery charger circuit. These circuits covered 5W~200W NiCd, NIMH, Lead-Acid, and Li-Ion/Polymer, LiFePo4 battery packs. We hope chargers circuits files can help our users to select correct chargers also can help them to get a good understanding about our products. .
Battery Charger from PC Power Supply

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Battery Desulfator

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RAPID BATTERY CHARGER FOR ICOM IC 2A

Rectifted and filtered voltage from the 24 Vac transformer is applied to the LM723 voltage regulator and the npn pass transistor set up for constant current supply. The 470 ohm resistor limits trickle current until the momentary pushbutton (S2) is depressed, the SCR turns on and current ftows through the previously determined resistor network limi .
UNIVERSAL BATTERY CHARGER

When power is applied to the circuit, SCR1 is off, so there is no bias-current path to ground; thus, LM317 acts as a current regulator. The LM317 is connected to the battery through steering diode D1, limiting resistor R1, and bias resistor R2. The steering diode prevents the battery from discharging through the LED and the SCR when power is remov .
BATTERY TRICKLE CHARGER

The circuit is built around an LM317T adjustable voltage regulator. Its output voltage (VOUT) is determined by the formula VOUT= l. 25 (1+R2/R1). I chose a 10-k © resistor for R1 and a 100-k © resistor for R2 to allow for a little wasted current flow (around 125 A). This will develop 13. 75 V between the output terminal and ground. R3 and a diode .
Solar Charger Build

Whatever past project these were used in obviously required three cells to be wired in parallel with a rather large (4700 uF) capacitor on a perf board. There were 13 of these board assemblies, for a total of 39 solar cells and 13 capacitors (not to mention the 13 perf boards themselves). The cells themselves are about 2. 25 inches square, and... .
Grid Powered Battery Charger

This circuit lets you keep the appliances plugged into your inverter. It won`t make the wind blow or the clouds go away, but it will keep your batteries safely charged even if you have a generation shortfall. I call it the Grid Charger Voltage Switch. The circuit utilizes a PIC microcontroller to monitor battery voltage and control a solid state... .
Switchless NiCd-NiMH Battery Charger

This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown here will eventually pay off because you no longer have to throw away your NiCds after three months or so of maltreatment in the original charger. The circuit diagram shows an LM317 in constant-current configur .
NiCd Battery Charger

The design of the charger is similar to that of many commercially available chargers. The charger consists of a mains adaptor, two resistors and a light-emitting diode (LED). In practical use, this kind of charger is perfectly all right. Resistor R1 serves two functions: it establishes the correct charging current and it drops sufficient voltage t .
Simple NiCd Battery Charger

A simple NiCd charger can be built using junk box` components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter composed of R3 and a transistor, it can charge as many cells as desired until a fully charged` voltage determined by the voltage regulator is reached, and it indicates whether it is charging or has reached the f .
DIY Circuit Car Battery Charger

This very simple circuit uses a transformer, two diodes, a capacitor and an ammeter. To charge a battery just connect the + and terminals of the circuit to the corresponding terminals of the battery. When the battery is not charged, the ammeter reading shows 1-3 amps. When the battery is fully charged the ammeter reads Zero or nearly zero, af .

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