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Power Supply Circuits
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Battery Charger Circuits
Ni-MH battery charger using LT4060
This is the circuit diagram of a very powerful and efficient Ni-MH battery charger using IC LT4060 from Linear Technologies. In addition to Ni-MH batteries Ni-Cd batteries can be also charged by slightly modifying the circuit. For charging Ni-Cd batteries connect the CHEM pin (pin12) of the IC to +Vcc. Here the circuit is configured to charge 2...
Simple 12V battery circuit with diagram
A 12V battery full charging circuit with simple diagram for rectifier is given.The lead acid trickle charger circuit is explained with a rectifier..
Ni-Cd battery charger circuit
This circuit can be primarily used for charging 12V Ni-Cd battery packs. Any way 6V and 9V battery packs can be also charged by using this circuit a little..
2.75 W High Eficiency Usb Charger
Ultra Small Mobile Phone Xenon Photoflash Capacitor Charger With IGBT Driver
The AAT1265 evaluation board provides a platform for the testing and evaluation of the AAT1265 low voltage 2MHz Step-up Regulator The evaluation board demonstrates suggested size and placement of external components to main- tain output voltage regulation for up to 250mA of output current. The external components are selected for small size to sui
BQ2000 Switch-mode Multi-Chemistry Battery Charger With Peak Voltage Detection Termination
BQ24400 Switch-mode NiCd/NiMH Battery Charger With Peak Voltage Detection Termination
BU8732AKV is a PCM codec IC for digital cellular phones. This includes plenty of Analog input / output functions such as a 14bit precision linear. / A-LAW codec, a Microphone Amplifier with two systems, Amplifiers for speaker and earphone and a Switch Transistor for driving a ringer. This IC is the most suitable for both PDC system and CDMA system
Battery Charger For Sla Nicd Nimh And Li-ion Batteries
FM Radio has a long history to its credit starting from its development in 1933. Today, FM Radio is an integral part of almost all mobile phones. In a common mobile phone, the cable to the earphone serves as the Antenna for FM reception, wherein the Antenna size is a bit relaxed. To be able to use FM Radio also without the earphone, the Antenna ha
NCP5080 Xenon Photoflash Capacitor Charger With Photo Sense Interface
The NCP5810D is a dual ’output DC/DC converter which CAN generate both a positive and a negative voltage. The device is optimized for powering modules such as AMOLED Display drivers where very good output voltage accuracy and regulation, signal integrity and space is essential for handsets applications. The output voltage of the inverter is fully
Smart Nicd/nimh Battery Charger Using Mc68hc908qy4
The SN74AVCA406E is a transceiver for interfacing Microprocessors with MultiMediaCards (MMCs), secure digital (SD) cards, and Memory Stick compliant products. By Texas Instruments
A solar battery charger
This circuit is intended for charging sealed lead-acid batteries with a solar panel in small and portable applications. The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination. The charger will stop charging once a pre-set voltage (temperature compens
Ni -Cd Batteries Chargers
Batteries charger & PSU - ideal for digital camerass
This circuit was created for digital cameras. It`s known the digital cameras have considerable power consumption. For example my camera Minolta E223 requires approximately 800 mA. In practice a mains power supply or high capacity NiMH accumulators (batteries) can satisfy this demand. This circuit consists of two parts, charger and adapter. The tra
Pulse Charger for reviving tired Lead Acid batteriess
Before you begin a project like this remember: mains voltage is dangerous so if you are not 100% sure of what you ’re doing consult a friend who has the skills or, don ’t do it at all ! If you own a motorcycle, a motor home, a caravan, a lawn mover, a day cruiser or maybe a vintage car you must at some point had to write off a lead acid b
DC 12V Battery Charger Circuit Schematic
DC 12V Battery Charger Circuit Diagram. This circuit is a high performance charger for gelled electrolyte lead-acid batteries..
Nickel-Cadmium (NiCd) Battery Charger
The circuit diagram shows a regular charger being powered by an AC input source, intended for charging batteries. This type of rechargeable batteries are..
12 Volt Car Battery Charger Circuit Schematic
Unlike many units, this battery charger continuously charges at maximum current, tapering off only near full battery voltage. In this unit, the full load..
A 12V Car Charger For ASUS Eee Notebook
The ASUS Eee is a fantastic ultra-portable notebook with almost everything required for geeks (and nothing that isn t). Plus it features fantastic build q..
A Friendly Charger Schematic for Mobile Phones
Charges and protects your mobile phone from voltage spikes and short-circuit Most mobile chargers do not have current/voltage regulation or short-circuit..
Battery Charger Display Using LT1639
The Over-the-Top type of operational amplifier is ideal for use as a current sense for battery charger applications. The design described here can be used..
Battery Charger Regulator
Most off-the-shelf car battery chargers cannot not be left connected to the battery for long periods of time as over-charging and consequent battery damag..
Bike Battery Charger
This simple circuit allows a 12V battery pack to be charged via a bike generator. The generator is rated at 3W and with this voltage multiplier circuit pr..
Float Charger For NiMH Cells
Although not a new device, the LM317 is still a high-performance regulator. Its output voltage is essentially immune to fluctuations in load, supply volta..
High-Current Battery Discharger
If you have a motley collection of 12V batteries in varying states of health, this simple circuit will allow you to easily check their capacity. It s basi..
IC Controlled Emergency Light With Charger Circuit
Here is the circuit diagram of IC Controlled Emergancy Light With Charger or simply 12V to 220V AC inverter circuit. The circuit shown here is that of the IC controlled emergency light. Its main features are: automatic switching-on of the light on mains failure and battery charger with over-charge protection. When mains is absent, relay RL2 is in
In-Car Charger And Switcher Circuit For SLA Battery
This circuit was devised to switch power to a Peltier cooler in a vehicle. Power to the load from the vehicle s battery is switched by a SPDT relay while..
Lithium-Polymer Peak Charger
This circuit was developed to charge the Lithium-Polymer cells used in a model aircraft. Lithium-Polymer cells are incredibly lightweight compared to Ni-c..
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..
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..
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..
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 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..
Free Energy Circuits
AC-DC & DC-DC Circuits
Solar Cell Circuits
Current Limiting Circuits
Micro Power Circuits
High Voltage Circuits
Switching Power Supply Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
CMOS Circuits Tutorial