Comments on DIY Electronics Projects and Circuit Diagrams, Schematics: Low Cost Universal Battery Charger Schematic

Plz post the voltage cut off circuit

2011-11-19T07:25:34.518+05:00

Plz post the voltage cut off circuit

Concerning the relay, pls explain the pins, and ho...

2011-11-01T17:22:26.365+05:00

Concerning the relay, pls explain the pins, and how to connect the pin to regulator and the output of the inverter.

How can i charge 12v 70ah battery

2011-10-27T11:54:44.496+05:00

How can i charge 12v 70ah battery

Hi, I want to make a charger to charge a NiMH ba...

2011-09-10T12:36:35.152+05:00

Hi,

I want to make a charger to charge a NiMH battery pack of 6V/2400mAH with a solar panel of 1.8W/6V kindly let me know the schematic for the same as we will require a boost circuit for the same.

Thanks

Um I am a kid and my r/c ufo uses 8 batterys (aa 1...

2011-05-22T16:08:43.220+05:00

Um I am a kid and my r/c ufo uses 8 batterys (aa 1.5v) in its chargerso so about 12v to charge for about 15 minutes. I want to make a plug in charger for it. I have the charger itself and a plug but I am not so good at the extra sciency stuff cos i am 12. Got any advice? HELP!!! please!!! Thanks....

thanks alot...it helps

2011-03-27T21:40:56.364+05:00

thanks alot...it helps

@KenChia Yeh! You can use 12V-400ma adapter.

2011-03-27T13:05:23.600+05:00

@KenChia
Yeh! You can use 12V-400ma adapter.

I'm using 9v 175mAh NiMH battery. Can I use 12...

2011-03-26T09:34:15.019+05:00

I'm using 9v 175mAh NiMH battery. Can I use 12V 400mA adapter?

hi I need more than 400ma, what the value for r1 a...

2010-12-26T13:01:28.328+05:00

hi I need more than 400ma, what the value for r1 and R2 if I use 1000ma,2000ma,and 5000ma, thanks

I decided to put a voltage divider on the input to...

2010-10-08T11:54:42.455+05:00

I decided to put a voltage divider on the input to the charger to lower the voltage to between 16 and 18V. That took care of my problem since my panels are putting out 20 to sometimes as high as 23V that was just too much. All is well. I also need to correct myself in my last post. The LED was on WITH the panels connected and the negative lead to the battery was connected as well... with or without the positive lead. Weird...

Nice circuit. I use it for 12V and smaller but I ...

2010-10-06T00:45:32.662+05:00

Nice circuit. I use it for 12V and smaller but I have a 14.4V (14 to 16V) NiMH I use for my solar tracker. Is there a mod that will allow the extra voltage? There is a voltage leak if I try to charge those batts... I think. I'm no expert but the LED is on when the 14.4 is hooked up and there is no power input connected. I am using a 3.9ohm for R1 and the input voltage is 20.5 to 22V depending on solar conditions.

Thanks

I am also thiking abut giving it a try.... thanks....

2010-05-11T07:44:34.952+05:00

I am also thiking abut giving it a try.... thanks....

Hi "Anonymouse. said..." This "Low ...

2010-03-31T21:37:13.740+05:00

Hi "Anonymouse. said..."
This "Low Cost Universal Battery Charger Schematic" is simple and having a hidden logic that you does not know something.
The LED will light up when the battery is charging. (But, there was no charging cut out circuit)

Hello All! I have only a question: The LED will l...

2010-03-23T20:10:23.868+05:00

Hello All!

I have only a question: The LED will light up when the battery is full or during the charge?

Thanks in advance!

I used these specifications but the simulation did...

2010-02-07T15:03:59.825+05:00

I used these specifications but the simulation didn't show the expected result. Thnx a lot for ur reply and i would use these resistances in ma hardware and hopefully there must have been some error in the software or in simulation. Thnx agayn!

@alive I don't understand that why did you use...

2010-02-06T18:03:07.836+05:00

@alive
I don't understand that why did you used R1=2100M and R2=1800M. You should use R1=120 ohm at (0.25W) and R2=47 ohm at (0.5W) for your desired output voltages and current as shown above in parts list and in diagram. Minimum input voltages will be 6v and the max will be 10 volts.
..::Best of Luck::..

When I kept R1=2100M ohm and R2=1800M ohm then the...

2010-02-06T15:05:32.229+05:00

When I kept R1=2100M ohm and R2=1800M ohm then the simulation showed an output of 1.2V. I doubt this simulation but don't know what resistances shall I practically use.

@alive What value of resistor R1 and R2 did you us...

2010-02-06T09:29:27.094+05:00

@alive
What value of resistor R1 and R2 did you used in your circuit?

I want make a 1.2V battery charger but when i simu...

2010-02-05T21:09:06.517+05:00

I want make a 1.2V battery charger but when i simulated this ckt on Multisim, it showed tht it wld require 5V supply and R1 and R2 should be in Mega Ohms to give the required output. Can any1 plz help me by telling which resistances shall i use? Plzzzzzzzzzz its urgent!

Great circuit! I had made it with this circuit. T...

2010-01-01T17:34:37.370+05:00

Great circuit!
I had made it with this circuit.
There are general, cheap and simple circuits. Furthermore, it is good working.
I have been satisfied in it.
Thank you, Izhar Fareed.
I will wait your simple and wonderful circuit.

I want to build this charger to replace charger fo...

2009-12-24T06:56:12.732+05:00

I want to build this charger to replace charger for my drill machine. My charger died few days ago. Can you please post PCB layout also for this project. I will use spare power supply for my old printer for this which has 18V.

Hi, I cant see Voltage selection figure.

2009-12-15T15:35:57.121+05:00

Hi,
I cant see Voltage selection figure.

Cool man, This rocks. I like the idea. Vijy my ma...

2009-12-11T02:19:44.645+05:00

Cool man, This rocks.
I like the idea.

Vijy my man, Use a pulse triger to cut off the power once the battery is fully charged. Or USE a simple timer.

hi, nice charger but does it cuts off battery ...

2009-12-05T17:13:45.760+05:00

hi,
nice charger but does it cuts off battery voltage when batteries are fully charged. no description given regarding this.

I got a 6V 120mA nicad battery pack and i wanna ch...

2009-11-23T02:47:19.337+05:00

I got a 6V 120mA nicad battery pack and i wanna charge it, i got a regulated 12V 1A power source, the walue of r2 shud be the one for 100mA or do i need another value for it ? btw sorry for my dumb question but im new 2 electronics ^.^"