Automatic battery charger circuit
A mobile battery charger circuit is a device that can automatically recharge a mobile phone’s battery when the power in it gets low. Nowadays mobile phones have become an integral part of everyone’s life and hence require frequent charging of battery owing to longer duration usage. Oct 17, · Wireless Mobile Charger Circuit Design: Wireless battery charger circuit design is very simple and easy. These circuits require only resistors, capacitors, diodes, Voltage regulator, copper coils and Transformer. In our Wireless battery charger, we use two circuits. The first circuit is transmitter circuit used to produce voltage wirelessly.
Battery chargers come as simple, trickle, timer-based, intelligent, universal battery charger-analyzers, fast, pulse, inductive, Mxke based, solar chargers, and motion powered chargers. These battery chargers also vary depending on the applications like a mobile phone charger, battery charger for vehicles, electric vehicle batteries chatger and charge stations.
Charging methods are classified into two categories: fast charge method and slow charge method. Fast charge is a system used to recharge a battery in about two hours or less than this, and the slow charge is a system used to recharge a battery throughout the night.
Slow charging is advantageous as it does not require any charge detection circuit. Moreover, it is cheap as well. The only drawback of this charging system is that it takes maximum time to recharge a battery. Bird flu how to protect yourself project aims to automatically disconnect a battery from the mains when the battery gets fully charged.
This system can be used to charge partially discharged cells as well. The circuit is simple and consists of How to fix iphone 4 headphone jack converter, relay drivers, and charge stations.
In an AC-DC converter section, the transformer step-downs the available AC supply to 9v AC at 75o mA which is rectified by using a full-wave rectifier and then filtered by the capacitor. The relay driver section consists of PNP transistors to energize the electromagnetic relay. This relay is connected to the collector of the first transistor and it is driven by a second PNP transistor which in turn is driven by the PNP transistor. In the charging section, the regulator What is 35 dollars in pounds is biased to give about 7.
To adjust the bias voltage, preset VR1 is used. A D6 diode is connected between the output of the IC and a limiting output voltage of the battery up to 6. When what shingles look like when they start switch is pushed, it latches relay and starts charging the battery. As the voltage per cell increases beyond 1.
When the voltage falls below mV, mzke the T3 transistor soolar off and drives to T2 transistor and in turn, cuts off transistor T3. The charging voltage, depending on the NiCd cell, can be determined with the specifications provided by the manufacturer. The charging voltage is set at 7. Currently, mAH cells, which can be charged at 70 mA for ten hours, are available in the market.
The voltage of the open circuit is about 1. The shut-off voltage point is determined by charging the four cells fully at 70 mA for fourteen hours and adding the diode drop up to 0. In addition to the above simple circuit, the real-time implementation of this circuit based on the solar power projects are discussed tp.
The main objective of this solar power charge controller project is to charge a battery by movile solar panels. This project deals with a mechanism of the charge controlling that will also do overcharge, deep discharge, and under-voltage protection of the battery. In this system, by using photovoltaic cells, solar energy is converted into electrical energy. Solar panels are used to convert sunlight energy into electrical energy. This energy is stored in a battery during day time and makes use of it during night time.
LEDs are used as indicators and by glowing green, indicates the battery as fully charged. Similarly, if the battery is undercharged or overloaded, they glow red LED. The Charge controller makes use of MOSFET — a power semiconductor switch to cut off the load when the battery is low or in an overload condition.
A transistor is used to bypass the solar energy into a dummy load when the battery is fully charged and it protects the battery from getting overcharged. This project aims to design a charge controller with a maximum power point tracking based on a microcontroller. The major components used in this project are solar panel, battery, inverter, wireless transceiver, LCD, current sensor, and temperature sensor.
The power from the solar panels is fed to the charge controller which is then given as output into the battery and is allowed for energy storage. The output of the battery is connected to an inverter that provides outlets for the user to access the stored energy. The solar panel, battery, and inverter are bought as the off-shell parts while the MPPT charge controller is designed and built by solar knights.
An LCD screen is provided for displaying storage power and other alert messages. The way to track a maximum power point by using MPPT algorithm implementation in the controller ensures that the battery is charged at maximum power from the solar panel. The two examples mentioned here can make the process easier for you. Moreover, if you have any doubts and need help with implementing real-time projects and industrial battery charger circuitshoq can comment in the comment section below.
Hello Tarun ji It really appreciable thought of giving such a nice information to which our world is much connected with, and the way you explained is good, but i feel that it would be better for understanding if cirduit contains some more pictorial representation.
Congratulations, keep it up. Best of Grace. Hi Kakinadh Thanks for your compliment. As per your suggestion, we will try to add the number of pictures for the better understanding of the mobilr. If you want more project ideas please check out the link. Hello Sir! Thankyou for this informative article. My concern is: you started off by explaining a mobile charger, but in the Auto-Turn off Battery Charger section, you made a circuit for a NiCd battery rated at 6.
I want to make a similar circuit but for a 5V Li-ion mobile battery charger with usb output. Can this circuit help me achieve that? I sincerely appreciate your kind response regarding my article and I have mailed your query to our technical team and I will update you as early as possible. For more project ideas check out the link. For any queries please email us on team elprocus.
For more project ideas please check out the link and if you have any query please email us on team elprocus. Hi Azhar Mohamed For ppt and project details please email us on team elprocus.
For more project ideas please check out the link. Hi Ketaki We are very sorry hlw inform you that once you purchase the project we can provide the circuit diagram, programming, and documentation.
For customization of projects please email us on team elprocus. Hi Pavan Thanks for your appreciation. Hope this article helped you. For more latest project ideas please check out the link. Sircan u suggest me any circuit to use one 12v 5ah rating battery [ of u. I will be extremely gratefull to you. Hello, please i need help on how to construct a simple torchlight which would be powered mechanically by the conversion of winding energy to electrical energy, wherein the control will be an SPST switch.
Hi Bere Chris Please write your query to team elprocus. We are very much sorry for the inconvenience caused to what to do in haast new zealand. Kindly bear with us. But We suggest you to check out the link for circiit the latest project ideas makee for customization of projects please email us cuarger team elprocus.
The Auto Turn off battery charger circuit shows AA batteries connected at the output end. Can this circuit be modified to have a USB connector at the output end such that the phone can be directly connected to this circuit?
Will it work in the same way if a mobile is connected at the output end? Thanks in advance. Sir I want to design a filtering circuit which will filter out put voltage generated from wind energy. Thanks for reading what is a low thyroid reading article. As per your query check out the link for the mobile charger circuit and its working principle.
Hope you will like it. Hi Rahman, Thanks for reading our article. As per your query please check the link for how to make a solar charger.
Hope this will help you. Share This Post: Facebook. Hi Raj Shah, Thanks for reading our article.
Apr 06, · Unfortunately every charger circuit is not same, some of them contains few extra capacitors or resistors. But even though, you can get a clear overview of the mobile charger circuit from the above diagram. The design is quite straight forward, built on a paper phenolic PCB, could be easily repaired. Part list of the mobile charger circuit. Nov 10, · 3) Solar Charger and Driver Circuit for 10W/20W/30W/50W White High Power SMD LED. The 3rd idea teaches us how to build a simple solar LED with battery charger circuit for illuminating high power LED (SMD) lights in the order of 10 watt to 50 watt. The SMD LEDs are fully safeguarded thermally and from over current using an inexpensive LM Apr 10, · If you need something with a lot more power, the BigBlue 3 USB Port 28W Solar Charger is just what you need. It’s larger than the GoerTek, but with 3 large solar panels and measuring ? ? ” folded or ? ? ” when opened you can still enjoy the handy portability of smaller solar charger.
Simple solar charger are small devices which allow you to charge a battery quickly and cheaply, through solar energy. The post comprehensively explains nine best yet simple solar battery charger circuits using the IC LM, transistors, MOSFET, buck converter, etc which can be built and installed even by a layman for charging all types of batteries and operating other related equipment.
Solar panels are not new to us and today it's being employed extensively in all sectors. The main property of this device to convert solar energy to electrical energy has made it very popular and now it's being strongly considered as the future solution for all electrical power crisis or shortages.
Solar energy may be used directly for powering an electrical equipment or simply stored in an appropriate storage device for later use. Normally there's only one efficient way of storing electrical power, and it's by using rechargeable batteries.
Rechargeable batteries are probably the best and the most efficient way of collecting or storing electrical energy for later usage. The energy from a solar cell or a solar panel can also be effectively stored so that it can be used as per ones own preference, normally after the sun has set or when it's dark and when the stored power becomes much needed for operating the lights.
Though it might look quite simple, charging a battery from a solar panel is never easy, because of two reasons:. The above two reason can make the charging parameters of a typical rechargeable battery very unpredictable and dangerous. Before delving into the following concepts you can probably try this super easy solar battery charger which will ensure safe and guaranteed charging of a small 12V 7 Ah battery through a small solar panel:.
That looks cool isn't it. In fact the IC and the diodes could already resting in your electronic junk box, so need of buying them. Now let's see how these can be configured for the final outcome. As we know the IC will produce a fixed 12V at the output which cannot be used for charging a 12V battery.
The drop of 0. The 2k2 resistor is used to activate or bias the diodes so that it can conduct and enforce the intended 2. If you are looking for an even simpler solar charger, then probably there cannot be anything more straightforward than connecting an appropriately rated solar panel directly with the matching battery via a blocking diode, as shown below:.
Although, the above design does not incorporate a regulator, it will still work since the panel current output is nominal, and this value will only show a deterioration as the sun changes its position. However, for a battery that is not fully discharged, the above simple set up may cause some harm to the battery, since the battery will tend to get charged quickly, and will continue to get charged to unsafe levels and for longer periods of time.
But thanks to the modern highly versatile chips like the LM and LM , which can handle the above situations very effectively, making the charging process of all rechargeable batteries through a solar panel very safe and desirable. The circuit diagram shows a simple set up using the IC LM which has been configured in its standard regulated power supply mode. The specialty of the design is that it incorporates a current control feature also. It means that, if the current tends to increase at the input, which might normally take place when the sun ray intensity increases proportionately, the voltage of the charger drops proportionately, pulling down the current back to the specified rating.
As the input current rises, the battery starts drawing more current, this build up a voltage across R3 which is translated into a corresponding base drive for the transistor. The transistor conducts and corrects the voltage via the C LM, so that the current rate gets adjusted as per the safe requirements of the battery. You will need just a solar panel panel, a selector switch and some diodes for getting a reasonably effective solar charger set up.
For a layman this would be something too complex and sophisticated to grasp and a system involving extreme electronics. In simple words an MPPT tracks the instantaneous maximum available voltage from the solar panel and adjusts the charging rate of the battery such that the panel voltage remains unaffected or away from loading.
Put simply, a solar panel would work most efficiently if its maximum instantaneous voltage is not dragged down close to the connected battery voltage, which is being charged. For example, if the open circuit voltage of your solar panel is 20V and the battery to be charged is rated at 12V, and if you connect the two directly would cause the panel voltage to drop to the battery voltage, which would make things too inefficient.
Conversely if you could keep the panel voltage unaltered yet extract the best possible charging option from it, would make the system work with MPPT principle. So it's all about charging the battery optimally without affecting or dropping the panel voltage. Choose a solar panel whose open circuit voltage matches the battery charging voltage.
Meaning for a 12V battery you may choose a panel with 15V and that would produce maximum optimization of both the parameters. However practically the above conditions could be difficult to achieve because solar panels never produce constant outputs, and tend to generate deteriorating power levels in response to varying sun ray positions.
That's why always a much higher rated solar panel is recommended so that even under worse day time conditions it keeps the battery charging. Having said that, by no means it is necessary to go for expensive MPPT systems, you can get similar results by spending a few bucks for it.
The following discussion will make the procedures clear. As discussed above, in order to avoid unnecessary loading of the panel we need to have conditions ideally matching the PV voltage with the battery voltage.
This can be done by using a few diodes, a cheap voltmeter or your existing multimeter and a rotary switch. We know that a rectifier diode's forward voltage drop is around 0.
Referring to the circuit digaram given below, a cool little MPPT charger can be arranged using the shown cheap components. Let's assume in the diagram, the panel open circuit voltage to be 20V and the battery to be rated at 12V. Connecting them directly would drag the panel voltage to the battery level making things inappropriate.
By adding 9 diodes in series we effectively isolate the panel from getting loaded and dragged to the battery voltage and yet extract the Maximum charging current from it. The total forward drop of the combined diodes would be around 5V, plus battery charging voltage Now suppose the sun begins dipping, causing the panel voltage to drop below the rated voltage, this can be monitored across the connected voltmeter, and a few diodes skipped until the battery is restored with receiving optimal power.
The arrow symbol shown connected with the panel voltage positive can be replaced with a rotary switched for the recommended selection of the diodes in series. With the above situation implemented, a clear MPPT charging conditions can be simulated effectively without employing costly devices. You can do this for all types of panels and batteries just by including more number of diodes in series.
The idea was requested by Mr. Sarfraz Ahmad. Basically I am a certified mechanical engineer from Germany 35 years ago and worked overseas for many years and left many years ago due to personal problems back home.
Sorry to bother you but I know about your capabilities and expertise in electronics and sincerity to help and guide the beginnings like me. I have seen this circuit some where for 12 vdc. I have attached to SMD ,12v 10 watt, cap uf,16 volt and a bridge rectifier you can see the part number on that. When I turn the lights on the rectifier starts to heat up and the both SMDs as well.
I am afraid if these lights are left on for a long time it may damage the SMDs and rectifier. I don not know where the problem is. You may help me. I have a light in car porch which turns on at disk and off at dawn. Unfortunately due to load shedding when there is no electricity this light remains off till the electricity is back. I want to additional two similar light elsewhere in the car porch to keep the entire are lighted.
Of course it will put additional load on UPS battery which is hardly fully charged due to frequent load shedding. The other best solution is to install 12 volt solar panel and attach all these four SMD lights with it. This solar panel should be capable to keeps these lights all the night and will turn OFF at dawn. You may take your time to figure out how to do that. I am writing to you as unfortunately no electronics or solar product seller in our local market is willing to give me any help, None of them seems to be technical qualified and they just want to sell their parts.
In the shown 10 watt to 50 watt SMD solar LED light circuit with automatic charger above, we see the following stages:. The two LM stages are configured in standard current regulator modes with using the respective current sensing resistances for ensuring a current controlled output for the relevant connected load.
The load for the left LM is the battery which is charged from this LM stage and a solar panel input source. The resistor Rx is calculated such that the battery receives the stipulated amount of current and is not over driven or over charged.
The right side LM is loaded with the LED module and here too the Ry makes sure that module is supplied with the correct specified amount of current in order to safeguard the devices from a thermal runaway situation.
A relay is introduced in the circuit and is wired with the LED module such that it's switched ON only during the night or when it's dark below threshold for the solar panel to generate the required any power.
As long as the solar voltage is available, the relay stays energized isolating the LED module from the battery and ensuring that the 40 watt LED module remains shut off during day time and while the battery is being charged. The LED module can be seen attached with a heatsink which must be sufficiently large in order to achieve an optimal outcome from the module and for ensuring longer life and brightness from the device. Assuming the battery to be a 40 AH lead acid battery, the preferred charging current should be 4 amps.
Limiting resistors are not employed for the 10 watt LEDs since the input voltage from the battery is on par with the specified 12V limit of the LED module and therefore cannot exceed the safe limits. The above explanation reveals how the IC LM can be simply used for making an useful solar LED light circuit with an automatic charger. In our 4rth automatic solar light circuit we incorporate a single relay as a switch for charging a battery during day time or as long as the solar panel is generating electricity, and for illuminating a connected LED while the panel is not active.
In one of my previous article which explained a simple solar garden light circuit , we employed a single transistor for the switching operation. One disadvantage of the earlier circuit is, it does not provide a regulated charging for the battery, although it not might be strictly essential since the battery is never charged to its full potential, this aspect might require an improvement.
Another associated disadvantage of the earlier circuit is its low power spec which restricts it from using high power batteries and LEDs. The following circuit effectively solves both the above two issues, with the help of a relay and a emitter follower transistor stage. This enables the battery to get the charging voltage through a transistor emitter follower voltage regulator.
The emitter follower design is configured using a TIP, a resistor and a zener diode. The resistor provides the necessary biasing for the transistor to conduct, while the zener diode value clamps the emitter voltage is controlled at just below the zener voltage value.
The zener value is therefore appropriately chosen to match the charging voltage of the connected battery. For a 6V battery the zener voltage could be selected as 7. The emitter follower also makes sure that the battery is never allowed to get overcharged above the allocated charging limit.
The above relay changeover instantly reverts the battery from charging mode to the LED mode, illuminating the LED through the battery voltage. The fifth idea presented below details a simple solar charger circuit with automatic cut-off using transistors only. Mubarak Idris. Referring to the above simple solar charger circuit using transistors, the automatic cut off for the full charge charge level and the lower level is done through a couple of BJTs configured as comparators.
Recall the earlier low battery indicator circuit using transistors , where the low battery level was indicated using just two transistors and a few other passive components. Here we employ an identical design for the sensing of the battery levels and for enforcing the required switching of the battery across the solar panel and the connected load.
Let's assume initially we have a partially discharged battery which causes the first BC from left to stop conducting this is set by adjusting the base preset to this threshold limit , and allows the next BC to conduct. When this BC conducts it enable the TIP to switch ON, which in turn allows the solar panel voltage to reach the battery and begin charging it.