How to Make a Car Battery Charger With At/ATX Power Supply

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Introduction: How to Make a Car Battery Charger With At/ATX Power Supply

It's very easy to make a very poerfull charger for car battery, uoy need a At or ATX Power supply with a especific power controller circuit: The TL494 or equivalent (DBL494, IL494, GL494, SL494, KIA494 OR KA7500).

With the old font, you need some componentes:
- LED;
- 15K Resistor;
- 680R resistor (for led);
- 10K potenciometer or trim-pot;

And conector an clips for the power charger.

To make de caherger you need to wel de trim pot (or potenciometer) in the pin 1 of the 494 (or equivalent) and the 15K resistor in line witch the genative.

Only this.

Then adjust to 13,8 volts and your charger is OK.

If don't can 13,8 Volts, you can try change the 15K resistor for an of 10K.

Is the best way to be a ecologic person, reuse an old font....

See the vídeo for more details (in portuguese...)


Tks!

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12 Discussions

0
koleszar
koleszar

3 years ago

Because I am not electrician, like to ask something. The number 1 leg goes to pin 1 and what about number 2 and 3 legs of the trim-pot?

Need some help to make it! Please!

0
sudoukpong
sudoukpong

3 years ago

if two of the unite connect -,+,-,+ can it bring 24 volt?

0
Dillon2016
Dillon2016

4 years ago

is it possible to get electric diagram of what you are doing or some better pics to see clear connections

0
sanjeev.saxena.9231
sanjeev.saxena.9231

4 years ago

Can we have video with narrations in English please.

0
Mows
Mows

4 years ago on Introduction

good idea ,need a electric diagram of what you are doing to understand......

0
slatinski
slatinski

5 years ago on Introduction

When i connect the pot and the resisitor the psu wont start :/ its ka7500

0
airton24x7
airton24x7

5 years ago

Olá, fiz as modificações, consegui os 13,8v após regular
o trimpot, quando ligo na bateria a fonte estala, barulho do cooler reduz, mesmo desligando da tomada continua ventilando puxando a carga da bateria... Alguma idéia? Quantos watts a fonte modificada? Obrigado.

0
imperiusPT
imperiusPT

6 years ago on Introduction

Bom projecto.

For our English friends, in the video it is said only to use this on acid/lead batteries of 12V 20+A (car, boat, trucks, etc).

0
eulerdgraca
eulerdgraca

6 years ago on Introduction

Too much current might damage your battery! Better read the battery specs before using this charger.

0
dreiseratops
dreiseratops

7 years ago on Introduction

This looks really great but I cant tell.
Maybe the video would help. Closed captions in english?

:)

0
dort
dort

Reply 7 years ago on Introduction

Dear, in this week I try put subtitles in vídeo. Thanks for your comment.