Solar Panel Lead-Acid Batteries Charger

Solar Panel Lead-Acid Batteries Charger Schematic

This Batteries Charger is advised for charging closed lead-acid batteries with a solar console in baby and carriageable applications. The accepted diode that prevents the array from absolution through the solar console has been replaced by a FET-comparator combination.

The batteries charger will stop charging already a pre-set voltage (temperature compensated) has been reached, and recommence charging aback the voltage has alone off sufficiently. The amount is broken aback the array voltage drops beneath 11V and reconnected aback it gets aback to 12.5V.

The batteries charger ambit has the afterward features:

* Charges until Vbat = 13.8V (adjustable), again float charges;

* Shuts bottomward amount aback Vbat < 11V (adjustable), resets at 12.5V;

* Temperature compensation;

* Will assignment with bargain and readily accessible apparatus like LM393 comparators and BUZ11 FETs;

* Uses beneath than 0.5mA aback application TLC393 comparators;

* Burns beneath than 20mW in FETs aback charging at 0,5A. (More big-ticket FETs with a lower RDSON will crop alike bigger results). Note that the charging accepted is bound alone by the solar console used.

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Sealed Lead Acid 12V Battery Charger

Sealed Lead Acid 12V Battery Charger Schematic

There are a cardinal of credibility we allegation to awning about the affliction and use of Sealed Lead Acid batteries.

Firstly, these batteries allegation be charged, absolved and stored actual carefully.

We commonly anticipate batteries can be stored for months (if not years) and they will be accessible for actual use.

This is not the case with SLA batteries.

If you abundance a NEW, abounding answerable SLA array for 6 months or more, you will acquisition it may be absolutely discharged.

You may additionally acquisition you cannot allegation it!! It may be worthless.

That's how aerial SLA batteries are.

They allegation be answerable on a approved base to anticipate them absolution to a actual low voltage level.

If the terminal voltage of a SLA array is accustomed to go beneath 8v, a action alleged SULPHATION starts to awning the apparent of the plates and prevents the array actuality re-charged. The centralized attrition of the array increases and it becomes useless. See articles Sealed Lead Acid Array Charger on Amazon

Parts List of SLA Array Charger

2 - 1R8 0.5watt resistors

1 - 150R 0.25 watt resistor

1 - 180R

1 - 560R

1 - 1k5

3 - 2k2

1 - 3k3

1 - 4k7

1 - 8k2

1 - 1k mini trim pot

1 - 1n ceramic

2 - 47u 25v electrolytics

1 - 5mm red LED

4 - 1N4148 arresting diodes

1 - 10v 0.25watt zener

1 - BC 547 transistor

2 - BC557 transistors

1 - MCR100-6 SCR

1 - 1m red lead

1 - 1m atramentous lead

2 - alligator clips

1 - 2m actual accomplished solder

1 - SLA Array Charger PCB

Also required:

1 - 12v AC agent (500mA AC)

1 - ability lead

1 - case

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Solar IPod Charger Project and Schematic

Solar iPod Charger Schematic

The Solar Panel

To accomplish our iPod solar charger we acclimated a 250mA 6 Volt Solar Console (available in the REUK Shop). Alike in the brightest sunshine the voltage is not badly aloft that of the iPod battery, and the accepted is affluence abundant to allegation the array in a few hours in ablaze altitude (even in the UK!).

A blocking diode should be acclimated (in the absolute solar console lead) to anticipate the iPod array from boring clarification at night if it is still affiliated to the panel. Unforunately this after-effects in up to 0.7 Volts actuality absent as calefaction in the diode, so it can be larboard out if you adopt to accept a faster charger which will allegation the array in lower ablaze conditions.

Note that abounding solar panels are supplied with a branch adapted blocking diode.

In adjustment to adapt the voltage from our 6 Volt solar console we acclimated an LM317T dent (available from the REUK Shop) in the afterward cool simple circuit:

Voltage Regulator

...where R1 is a 270 Ohm resistor, and R2 is theresistor used to set the output voltage according to the following equation:

R2 = R1 * ( (VOUT/1.25) -1 )

Since our desired charging voltage is 5 Volts, we see that ideally R2 would be 270 * ((5/1.25) -1) = 810 Ohms. This is not a standard resistor size, however we had an 820 Ohm resistor which should result in an output voltage of 5.05 Volts.

Wiring up the aloft ambit on a prototyping breadboard with a 270 Ohm R1 resistor, and 820 Ohm R2 resistor we can affirm that the achievement voltage is 5.06 Volts - absolute for our iPod charger. It is capital to analysis that the achievement voltage is about 5 Volts application a acceptable multimeter afore attempting to allegation your iPod or the array and/or iPod itself could be damaged.

iPod Solar Charger Prototyping

Connecting the Charger to the iPod

The iPod is supplied with a USB cable. One end is acquainted into the iPod and the added end has a macho USB-A plug.

It can generally be cheaper to buy a cable with a adapted changeable USB-A adapter and cut it off to use in this project. Simply affix the red USB cable wire to the 5V absolute achievement from the LM317T, and the atramentous USB cable wire to the arena (negative).

According the blueprint beneath the 5 Volt achievement from the LM317T should be affiliated to pin 1, and the arena (negative) affiliated to pin 4.

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Low Cost Universal Charger Circuit Diagram

Here is the ambit diagram of a low amount accepted charger for NiCD - NiMH batteries. This ambit is Ideal for car use. It has adeptness to transform a mains adapter in to a charger . This one can be acclimated to allegation cellular phone, toys, portables, video batteries, MP3 players, ... and has selectable allegation current. An LED is amid in ambit to announce charging. Can be congenital on a accepted purpose PCB or a veroboard. I achievement you absolutely like it.

Low Cost Universal Charger Circuit Diagram Prt

R1 = 120R-0...5W
R2 = See Diagram
C1 = 220uF-35V
D1 = 1N4007
D2 = 3mm. LED
Q1 = BD135
J1 = DC Input Socket

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USB Mobile Phone Battery Charger Circuit

USB Mobile Phone Battery Charger Circuit

This simple ambit can accord adapted 4.7 volts for charging a adaptable phone. USB aperture can accord 5 volts DC at 100mA accepted which is acceptable for the apathetic charging of adaptable phones. Most of the Adaptable Buzz batteries are rated 3.6 volts at 1000 to 1300 mAh. These array packs accept 3 NiMh or Lithium beef accepting 1.2 volt rating. Usually the array backpack requires 4.5 volts at 300-500 mA accepted for fast charging.

But low accepted charging is bigger to access the ability of the battery. The ambit declared actuality provides 4.7 adapted voltage and acceptable accepted for the apathetic charging of the adaptable phone. Transistor Q1 is acclimated to accord the adapted output. Any average ability NPN transistor like CL100, BD139, TIP122 can be used. Zener diode D2 controls the achievement voltage and D1 protects the polarity of the achievement supply. Front end of the ambit should be affiliated to a A blazon USB plug.

Connect a red wire to pin1 and atramentous wire to pin 4 of the bung for accessible polarity identification. Affix the achievement to a acceptable charger pin to affix it with the adaptable phone. After accumulating the circuit, admit the USB bung into the atrium and admeasurement the achievement from the circuit. If the achievement is OK and polarity is correct, affix it with the adaptable phone.
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iPod Battery Charger Circuit Diagram

iPod Battery Charger Circuit Diagram

This is the iPod Battery Charger Part list:

P1 = 1K
R1 = 1R-0.5W
R2 = 1R-0.5W
R3 = 1R-0.5W
R4 = 1K
R5 = 560R
R6 = 10R-0.5W
R7 = 470R
C1 = 470uF-25V
C2 = 100nF-63V
C3 = 470pF
C4 = 100uF-25V
D1 = 1N5404
D2 = TVS1P6KE27A
D3 = 1N5819
D4 = 5.1V-1W Zener Diode
D5 = 5mm. Red LED
L1 = 220uH
S1 = USB 'A' Type Socket
SW1 = On/Off Switch
IC1 = MC34063A

Using the USB port on your computer to charge your player’s batteries is not always practical. What if you do not have a computer available at the time or if you do not want to power up a computer just for charging? Or what if you are traveling? Chargers for Mobile Phones iPods and MP3 players are available but they are expensive and you need separate models for charging at home and in the car.
This charger can be used virtually anywhere. While we call the unit a charger, it really is nothing more than a 5V supply that has a USB outlet. The actual charging circuit is incorporated within the iPOD or MP3 player itself, which only requires a 5V supply. As well as charging, this supply can run USB-powered accessories such as reading lights, fans and chargers, particularly for mobile phones.
The supply is housed in a small plastic case with a DC input socket at one end and a USB type "A" outlet at the other end, for connecting to Mobile Phone, an iPod or MP3 player when charging. A LED shows when power is available at the USB socket. Maximum current output is 660mA, more than adequate to run any USB-powered accessory.

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Universal Battery Charger Circuit

Universal Battery Charger Circuit Part List:

R1 = 120R-0...5W
R2 = See Diagram
C1 = 220uF-35V
D1 = 1N4007
D2 = 3mm. LED
Q1 = BD135
J1 = DC Input Socket

This is circuit diagram of a low cost universal charger for NiCD - NiMH batteries. This circuit is Ideal for car use. It has ability to transform a mains adapter in to a charger . This one can be used to charge cellular phone, toys, portables, video batteries, MP3 players, ... and has selectable charge current. An LED is located in circuit to indicate charging. Can be built on a general purpose PCB or a veroboard. I hope you really like it.

Read More → Universal Battery Charger Circuit