The most lead-acid battery charger circuit by LM317
When you want to build the lead-acid battery charger project for 6V battery or 12V. Although there are many methods to choose from. I like using IC LM317.....
Battery voltage monitor circuit by LM339
This simple low voltage tester circuit can be used to monitor battery and other voltage sources of current for problems, by LED display and alarm sound. Which.....
Best 12V battery charger circuit using LM311
The our best 12 Volt battery charger circuit, this is a charger circuit automatic system, then when the battery voltage is lower than specified, this circuit.....
Battery Circuit Charging Indicator
I have a small solar panel for maintaining my 12V car battery. (Circuit below.) The panel supplies about 75mA to the battery in full sunlight. I want to avoid w...
36V battery charger
I need a constant voltage 44V, 1A max battery charger. This will be built into the battery compartment of an e-bike, and will be permanently connected to the th...
USB Powered Mobile Phone Battery Charger
This simple circuit can give regulated 4. 7 volts for charging a mobile phone. USB outlet can give 5 volts DC at 100mA current which is sufficient for the slow ...
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 event.....
Storage Battery Exerciser
A motorcycle or boat battery that is not needed over the winter is usually charged before being put away for the winter, after which it remains standing unused ...
Solar-Powered High Efficiency Battery Charger
This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficie.....
Solar Panel Based Charger And Small LED Lamp
You can save on your electricity bills by switching to alternative sources of power. The photovoltaic module or solar panel described here is capable of d.....
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.....
Simple Battery Charger Circuit Charges Upto 12 NiCD Cells
This handy circuit can be used to charge from one to 12 NiCd cells from a car battery. Up to six cells can be charged with switch S1 in the normal posit.....
Self-Powered Fast Battery Tester Schematic
This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters. It features two ranges: when SW1 is set as shown in ...
NiMH Charger For Up To Six Cells
The circuit presented here is intended for charging NiMH batteries. The MAX712 IC used here contains all the necessary functionality to make sure that this happ...
Nicad Charger Uses Voltage Cut-Out
This circuit charges two NiCad cells with a constant current and features dual charging rates, voltage cutoff and an audible alarm. The circuit is powered.....
Mobile Phone Battery Charger
Small and portable unit, Can be assembled on veroboard Mobile phone chargers available in the market are quite expensive. The circuit presented here comes.....
Mobile Phone and iPod Battery Charger
Charge your iPod without connecting it to a computer! Using the USB port on your computer to charge your player s batteries is not always practical. What.....
Mobile Cellphone Battery Charger
Stops charging when battery is full charged, Portable unit Charging of the mobile phone, cellphone battery is a big problem while traveling as power suppl.....
Low-Power Car/Bike USB Charger
Looking for an efficient USB charger that can operate from a 12V car battery? This unit functions at up to 89% efficiency and can charge USB devices at cu.....
Low Cost Universal Battery Charger Schematic
Low cost solution for charging of both NiCd and NiMh batteries Here is the circuit diagram of a low cost universal charger for NiCD NiMH batteries. This.....