Lead Acid Battery Charger | Electronic Project Circuits

Posts Tagged ‘lead acid battery charger’

Lead-acid battery charger by L200

The battery charger circuits above have been in use for quite some time during my 26/battery fetish period. Making chargers for my B+ battery stack left me melancholic with the thought of repeating the soldering task up to 35 times. Looking through some old datasheet books I discovered a little critter that combines the circuits above into a single chip. Granted, it only removes the BC547 from the picture, but it makes soldering so much easier as there are less routes to be made. Just solder on the desired resistor values and you’re off.

The chip in question is the L200. It can supply up to 2A of output current (plenty for any battery) and is setup almost the same as a regular LM317, it just has two extra pins (3 and 5).

Pin 1 : Input supply
Pin 2 : Output
Pin 3 : Ground
Pin 4 : Voltage refference (used to set output voltage)
Pin 5 : Current-limit sense input
The output voltage is calculated as follows:
2.77V x (1 + (Pot / 1K))

The current limit is calculated as follows:
Imax = 0.45V / R1
Say you want 1A of maximum output, you would need a 0.45 ohm resistor (0.45V / 1A). The 0.45V is a given taken from the datasheets (V5 – 2).

12V lead acid battery charger by LM317K

Today a close friend visits tell want Dry cell lead acid battery charger circuit 12V 7.5hA sizes. In model to are simple and economize with. I then advise this circuit try build see. By use the integrated circuit voltage regulator the number is highly popular be , LM317K. This circuit has the principle is simple be heal level voltage be stable 13.5 Volt. Because battery must use voltage tall more then charger get follow want. Which battery of a friend must use current 1A take time charging about 8 hour then will have the electric energy with full speed ahead. The detail is other , see in the circuit. More information

Be the first to comment - What do you think? Posted by admin - April 20, 2009 at 10:41 am

Categories: Battery charger Tags: 12v battery charger circuit, lead acid battery charger, LM317K

Atmel Solar Panel Battery Charger by ATtiny13V

Batwatch is a simple monitor for a solar panel battery charger, using an Atmel ATtiny13V. It periodically measures the charge current and battery voltage, and shows them by blinking two LEDs. I built this circuit into the plug of a VW solar charger panel that is used to prevent a discharge of the battery when a car is not used for some time. A modern car contains a large amount of electronics, and a quiescent current of 40-50mA (about 1Ah per day!) is considered “normal”.

Read More Source:http://www.xs4all.nl/~dicks/avr/batwatch/index.html
Thank you.