Introduction: How to Make an Automatic 12V Battery Charger

By www.youtube.com/SteveWillsonKuju
About: Hi, I'm Steve! I'm a creative mind with a knack for technical skills—I can build just about anything you can dream up! From innovative projects to captivating designs, I bring ideas to life with passion and pr…

Hey! everyone My name is Steve.

Today I'm going to show you How to Make a 12v Battery Charger

Click Here to See The Video

Let's Start

Step 1: Features

Input Power

  • 110-220 v AC

Output Power

  • 1.25-24 v DC Adjustable at 8 Amps

Built-in Protection

  • Short Circuit Protection
  • Over Load Protection
  • Over Charge Protection

Charger Features

  • Constant Current Charging
  • Constant Voltage Charging
  • Full charge indicator
  • Charging Indicator

Continuously asked Questions

Q - Can I leave it overnight

A - Yes! For Sure this will not overcharge your battery just because we're using constant voltage there will be no potential difference to make your battery overcharge

Q - Why you are setting the voltage to 13.8v

A - Just because when a 12v battery get fully charged the voltage is 13.8v Google it for more information



Step 2: Gallery

Step 3: Things You Need

Banggood

Aliexpress

Amazon

https://www.utsource.net/ is an online platform for electronic technicians, Makers, Enthusiasts, Kids to find electronic components

Step 4: Stand Off Installation

  • First, install the standoff "as shown in the image "
  • Do the same for SMPS and DC to Dc Convertor

Step 5: The Acrylic

  • First, pull off the protective layer from the acrylic sheet
  • Now place your components " as shown in the image "

Step 6: The Drill

  • Now use a marker to make the point for drill
  • Now use a 2mm drill to drill the holes
  • And now go for 3mm drill bit and at last counter shink all the holes " as shown in the image "

Step 7: Assembly

  • Now use some screw to screw the board with acrylic sheet " as shown in the image "

Step 8: Wiring Diagram

Step 9: Wiring Part 1

  • Now solder the XT60 with Ammeter with some wire " as shown in the image "
  • And then use heat shrink tube to secure the connection

Step 10: Double Sided Tape

  • I used some double-sided tape to hold the Ammeter and XT60 Connector

Step 11: Wiring Part 2

  • And I Passed all the wire underneath the board till last and connected it to the converter output" as shown in the image "
  • And now I took 2 wire along with ammeter wire and connected it to the output of SMPS " as shown in the image "
  • And now I connected the ammeter wire and passed all the wire underneath the board till last and connected it to the converter Input

Step 12: Output Wire

  • I used XT60 connector with 2 alligator clip and wired it together and used some heat shrink to secure the connection

Step 13: Input Wire

  • I used XT60 connector and connected it to the Green connector for mainline input " as shown in the image "

Step 14: Final Assembly

  • I used couple of screws to close the upper acrylic sheet
  • And used some rubber feet on the bottom

Looks neat

Step 15: Calibration

  • Now connect the main input wire
  • In order to set the current, you need to short the output wire and now set the current with the potentiometer " as shown in the image "
  • now you need to disconnect the output wire in order to set the voltage and now set the voltage with the potentiometer " as shown in the image "

My Settings

  • Set the Voltage to 13.8v
  • And set the current to 1 Amps or more it depends on the battery size

Find out the current

  • Use this formula - Battery Capacity x 1/10 = setting

Example

  • I used a 7 amp battery, now let's put the formula
  • 7 x 1/10 = 0.7 and here I set it to 1 amp " You can go for little higher current but not too much "

Step 16: Finishing Up

  • Now just plug the battery and it's all set
  • You can see the ammeter it's drawing about 1A just because we have limited the current it is the safest way to charge the battery
  • And when the battery will get fully charged " This will automatically stop the charging " Just because we have limited the Voltage and there is no potential difference to overcharge the battery

Indicator

  • Red Light - Charging
  • Blue Light - Full Charged

That's all for today guys!

Click Here to See The Video

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