Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Power Supply Circuits
Battery Charger Circuits
Battery Charger Circuits
Mobile cellphone charger with battery
Here is a simple project using very common electronics components for charging mobile battery using AA cells. 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...
Battery Charger Schematic Diagram
In-Car Charger And Switcher Circuit For SLA Battery Circuit
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 the ignition switch is turned on and from the SLA auxiliary battery when the ignition is off. The SLA battery is charged from the vehicle`s battery. When the engine is running, the voltage remain
Toyota MR2 EV Wiring Schematic
Solar Cell Charger Schematic
Solar Cell Charger Schematic. The circuit was built with a single oscillator system (blocking oscillator)..
6v battery charger circuit diagram
figureyaga - lead acid battery charger circuit schematic
The schematic for this charger is pretty simple. GellCell Battery Charger: circuit to charge a Gell Cell or other lead-acid type. This simple battery level monitor circuit can indicate the charging process in 12 Volt Lead Acid battery or Tubular. 12V battery level monitor circuit schematic. Sep 24, 2009. Solar charge
AUTO fast battery charger for cars
Solar Charger Schematic
To take advantage of sunlight shining on the earth can continue to be utilized to serve as a power source so that we can at least save on electricity prices continuing to rise, below is one of a series of simple power plant can be created and used to fill your motorcycle battery or for emergency lights. Sunlight is received by the solar panels are
USB powered battery charger circuit
I will share about the series used in the usb to charge battery. Issued voltage 4. 7 Volt to 5 Volt DC suitable for battery charge the phone, as well as other batteries. Below is a circuit where the voltage is removed the usb on the computer will be strengthened by several components so that the voltage used to charge batteries more po
Battery ChargerCircuit Using IC 555
The simple battery charger circuit design shown here uses the versatile IC 555 as the main component. The circuit can be used for charging all types of rechargeable batteries within the specified limits as given in the article.
simplest smf automotive battery charger
A very simple battery charger circuit is described in this article, which uses just a single transistor for the voltage detection as well as for automatically disconnecting the battery from the supply when it gets fully charged. This adjustment becomes the high voltage trip point of the circuit and is used to switch OFF the charging voltage to
how to make solar battery charger
make this solar powered fence charger
A Fence charger or energizer is an equipment which is used for charging(electrifying) a fence or a boundary in order to protect the inside premise from human or animal interventions. Since these boundaries are mostly of large fields and parks, are normally away from the main cities, and powering them through some renewable option becomes more
modified battery charger circuit
Using a transistor won`t give accurate results, moreover the setting part would become very tedious. The circuit is technically correct, if you can adjust the tripping point correctly, then it might just work. Vinod: I made the charger (hysteresis) but there is a problem. i will attach the image to explain the problem. When i connect multimeter...
car battery charger
This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the battery is fully charged, the circuit switches off and lights a LED, telling you that the cycl
usb powered lithium ion battery charger
USB Battery Charger For Lithium Ion battery with the LM3622 is a series of lithium ion battery charger. This charger circuit operates using power from the USB source computer. Current consumption of a series of with 400mA LM3622 is limited by R1, so it does not exceed the current maximum limit that can be given by a USB computer. Brains from USB
solar charger circuit by lm317
A solar charger circuit is used to charge lead acid batteries or Ni-Cd with solar power. Circuit harvests solar energy to charge a 6 volt battery 4. 5 Ah battery for various applications. The charger has voltage and current regulation and voltage cut-off facilities. The circuit uses a 12 volt panel solar energy and a variable voltage regula
single cell lithium charger circuit
24v 7ah lead acid battery charger
This lead acid battery charger circuit is designed in response to a request from Mr. Devdas. C. His requirement was a circuit to charge two 12V/7AH lead acid batteries in series. Anyway he did not mentioned the no of cells per each 12V battery. The no of cells/battery is also an important parameter and here I designed the circuit assuming each...
automatic 12v lead acid battery charger
This is design for charger circuit that is suitable for lead-acid battery, including flooded, gel, and AGM types. This circuit is simple design. This is the figure of the circuit. The automatic term means that this charger will stop charging automatically when the battery voltage reach a certain pint, indicating that the battery has been fully cha
car battery charger
simple accu charger circuit
The Accu charger circuit is very simple and easy to make, because it only requires a few components are also not more than 10 components. Besides easy charger circuit is also very cheap and very efficient. This circuit requires power supply from a transformer that comes from an AC voltage 220 and diuturunkan be 12-13 volts and then enter...
heavy duty portable charger for usb devices phones ipad etc using pic12f683
Heavy duty portable charger for usb devices (phones, iPad, etc.) Ever needed to charge your phone on the go? Can`t find a wall socket to charge your iPod?..
lithium ion li ion battery charger with
Above diagram is the circuit of Lithium-ion (Li-ion) battery charger which built based single chip MAX1879. This is the simple and low cost battery charger for single-cell Li+ battery that does not dissipate power (no heat. The MAX1879, in conjunction with the AC linear transformer adapter and a PMOS FET, allows safe and fast charging of a single
mosfet low dropout charger circuit
This circuit is design circuit for low drop out charger using a MOSFET as the pass element, but this circuit does not include current limiting. This is the figure of the circuit. This circuit is a simple design. This circuit uses Q3 and a Schottky diode to isolate the battery from the charging circuitry when the input voltage is removed, to preven
battery charger indicator circuit
This is battery charger indicator circuit diagram. When the battery charges it shows by the LED this circuit can be used with 12V battery with charging current less than 1A.
build automatic car battery charger
This is a project for those who want to build their very own Automatic Battery Charger. This is a project made by duc_tech..
Wind powered mobile phone charger
make 6v 4ah automatic battery charger
The 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. IC LM317T is the heart of the circuit. The circuit is automatic so when the battery will become full charge it will stop charging. These type of circuits are very useful for solar garden light and can also
mobile phone battery charger circuit
The 220V AC mains supply is downconverted to 9V AC by transformer X1. The transformer output is rectified by diodes D1 through D4 wired in bridge configuration and the positive DC supply is directly connected to the charger`s output contact, while the negative terminal is connected through current limiting resistor R2. LED2 works as a power indica
battery charger for 12v
This is a design of the circuit diagram of a simple and straight forward battery charger that can be used to charge all type of 12V rechargeable batteries including car batteries. For indicate when the battery is fully charged, the ammeter reading will be zero. For attention, it is always be careful to connect the charger to the battery in correct
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