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Battery Monitor Circuit

Here is a battery monitor circuit which can be used to monitor the voltage of 12V lead acid batteries such as car batteries. The circuit is built around the LM3914 IC...

USB Car Charger

This is a project of a mini USB car charger circuit. The circuit can charge USB devices with car battery...

Automatic NiMH Battery Charger Circuit

Circuit of a full automatic NiMH battery charger using positive integrated voltage regulator IC 7805 which is porviding a constant current to charge the batteries...

Multiple NiCd & NiMH Battery Charger Circuit

A very interesting and useful circuit of a multiple nicd & nimh battery charger circuit which can charge batteries of many electronic devices for example radio, mp3 players, cellular phones...

USB Charger

This is a portable battery powered USB charger circuit. This circuit is able to charge your PDAs, Ipods, Mp3 players and any device that plug in to a computer USB to charge...

NiCd Battery Charger Circuit

This is a NiCd battery charger circuit. This circuit can charge 12V nicd battery pack. But you can also charge 6V and 9V battery packs...

Lead Acid Battery Charger Circuit

lead acid battery charger schematic using the famous IC LM 317. The circuit provides the correct voltage to charge the 12v sealed lead acid battery or 12v SLA battery...

Solar Battery Charger Circuit

Here is a  solar battery charger schematic which can charge 12 volt SLA batteries. This solar battery charger circuit has auto cut off function so it will automatically stop charging when the battery become full charge...

Li Ion Battery Charger Circuit

This is a circuit of a simple single cell li ion battery chager. This lithium ion battery charger circuit uses a LP2931 regulator IC...

Car Battery Charger

This is a schematic diagram of a full automatic 12v battery charger for charging the batteries of automobiles etc. This circuit has a maximum 2 amperes charging rate...

NiCd Battery Charger Schematic

The circuit is able to charge 2.4V, 4.8V, and 9.6V NiCd batteries. The LM317T IC showed in this NiCd battery charger schematic is use to regulate...

6V 4.5AH Battery Charger Circuit

Here is a 6V 4.5 AH battery charger circuit which is able to charge 6V 4.5 AH lead acid batteries. The schematic is very simple and using only few components...

6V Battery Backup Circuit

The project shown here is a 6V battery backup circuit. The circuit is easy to build and work as a mini UPS for 6V devices.

AlkalineBattery Charger

A good designed circuit of a Alkaline battery charger. The interesting thing of this circuit is that it uses a led that will show the charge of battery by blinking, when you connect a totally discharged battery the LED blink faster but when the battery charging process starts the LED blinking speed will dicrease slowly and completely stop when the battery will fully charged.

1.5 Volt DC to DC Converter

This is a circuit of dc to dc converter, this is a versatile circuit and can be use for many purposes in this diagram LT1073 is used for 1.5 volt to 5 volt conversion, voltage can be taken from any size of 1.5 volt battery for example AA or AAA.

Single Cell 1.5A Li-Ion Battery Charger

A miniature low dropout lithium-ion battery charger circuit using LTC1731.
AA Battery Solar Charger

A useful circuit of a solar charger, the circuit charges AA or AAA type battries. The best charging power achieved by placing the circuit in direct sun light. This circuit can be also use for powering any equipment like radio, disk man or palm etc which uses AA or AAA type batteries.

9V Battery Backup Circuit

This 9V battery backup circuit will work as a mini UPS. The circuit will instantly convert to battery power if the input voltage is absent...

DIY Solar Cell Phone Or USB Charger

Here is the schematic of a simple DIY solar cell phone or USB charger circuit. This solar USB battery charger circuit can be used to charge...

Simple Battery Monitor

Here is a project of a simple battery monitor circuit. The circuit will monitor the voltage of 12 and 9V batteries and indicate by activating an LED when the battery level will...

Automatic Battery Charging Timer

This is a project of a universal automatic battery charging timer circuit. The circuit is able to charge many types of batteries from 5 to 12 volt...

Battery Level Monitor Using TL071 IC

The figure below shows a very useful project of battery level monitor using TL071 IC. The circuit is simple and easy to build and using...

Low Battery Voltage Cutoff Or Disconnect

Here is a very useful project of low battery voltage cutoff or disconnect circuit. Rechargeable batteries deliver very good performance and life if we take care of...

Simple 12V Battery Status Indicator

This is a very useful project of a simple 12V battery status indicator circuit. The circuit will indicate the level of 12V battery voltage through four LEDs...

Low Battery Voltage Indicator Alarm

For making the batteries to last longer requires care of them, one of the main factor that weakens the rechargeable batteries is deep discharging them...

12V, 9V, 6V Automatic Battery Charger

This article describes a very easy circuit of 12, 9V, 6V automatic battery charger. The circuit can be set for charging different voltage batteries...

12V & 6V Battery Charger With Auto Cut Off

Here is a very simple automatic 12V and 6V battery charger circuit with auto cut off relay. The term auto cut off means that the circuit will automatically...

5V, 6V, 9V Automatic UPS Or Battery Backup Project

We often feel the need of an automatic UPS (Uninterruptible power supply) or a battery back circuit for our 5V, 6V and 9V projects. So here we have designed a good...

DIY Cell Phone, MP3, iPod, iPad Battery Bank

This DIY cell phone battery bank can be used as a backup charger for your cell phones and other devices for example MP3 players, iPad, iPod and any device which...

Emergency Cell Phone / Mobile Charger

A very useful project of simple emergency cell phone or mobile charger. The circuit can also be used for charging other devices, which require 5V input for charging...

12V Battery Backup Power Supply

Project of simple automatic 12V battery backup power supply circuit. The circuit will automatically shift the load to the battery when the mains supply is not present...

555 Low Battery Indicator For 12V Batteries

The figure below shows a very simple and useful project of a low voltage indicator for 12V batteries using a 555 timer IC. The circuit will indicate by activating an LED...

555 Low Battery Indicator For 6V Batteries

Here is a very simple and easy project of a 555 low battery indicator for 6V batteries. Every time a battery gets completely discharge it will lose some of its capacity due...

Low Battery Cutoff For 6V Batteries Using 555 IC

Here is a very simple and easy project of a 555 low battery indicator for 6V batteries. The circuit will automatically disconnect the battery from the load when the voltage...

555 Universal Automatic Battery Charger

The circuit can be adjusted to automatically charge any type of rechargeable battery From 6V to 24V and supply 10A max current...

Low Battery Cutoff For 12V Batteries Using 555 IC

The circuit can be with 12V batteries placed any where, for example solar plants, UPS etc. It can be used with any type of batteries like sealed lead acid, lead acid,...

Battery High Low Monitor

This simple two stage battery high low monitor circuit can be used with variety of batteries from 6V to 12V. The circuit is quite simple to build and using a low cost...

4 LED Battery Monitor Using Two LM358 ICs

A simple low cost and accurate 4 LED battery voltage monitor using two lm358 operational ICs...

Smart Universal Automatic Battery Charger

This smart battery charger will take care of your rechargeable battery and will automatically start charging when your battery voltage falls...

LM324 Battery Monitor

A good quality 4 LED LM324 battery monitor circut. The circuit is versatile and can be used for any type and voltage battery...

Battery Monitor Using LM339 IC

Here is a project of a battery monitor circuit using LM339 IC. The circuit can be used to monitor any type of batteries from 6V to 12V...

Car Battery Monitor With Low Battery Cutoff Function

The figure below shows a project of a car battery monitor with low battery cutoff function. The circuit can be used with any vehicle...

8 LED Battery Monitor Using LM324

This is a project of a low cost 8 LED battery monitor using LM324 IC. The circuit can be used to monitor different voltages and kinds of batteries. It is using two LM324...

DIY Bicycle Dynamo USB Charger

A bicycle dynamo output can be used to power variety of devices, in this article we are discussing about DIY bicycle USB charger circuit...

Automatic Bicycle Dynamo Headlight & Battery Charger

Here is a very interesting and useful project of an automatic bicycle dynamo headlight and battery charger circuit...

Early Car Battery Failure Detector

This circuit provides an early warning or indication of the failure of your car battery by activating a buzzer for few seconds, so you can understand that the battery is now...

Battery Full Charge Alarm

Here is a very useful project of a battery full charge alarm circuit. The circuit can be used with many different types of batteries with different voltages...

Battery High Low Alarm For Multiple Batteries

The figure shows a battery high low indicator alarm circuit, the circuit can be adjusted to monitor any type of battery from 6V to 24V. It will provide a beeping signal...

Battery Backup For Multiple Equipments

A battery backup supply is essential in situations when continuous working of equipments without any disconnection is required during power outages...

Automatic Sequence Solar Battery Charger

Solar panels are good source of free energy, solar systems are usually used to charge 12V high ampere batteries, some days the batteries get full day to charge...

Transistor Based Solar Battery Charger With Auto Cut Off

This is a project of a simple transistor based solar battery charger with auto cut off function that will charge a battery from solar panel and disconnect it when it gets full...

LM3914 Automatic 12V / Universal Battery Charger

LM3914 IC is made to sense voltage levels of power supplies and batteries, but it can easily be modified to a very smart automatic battery charger that can be used...
Battery Charger Circuits