Introduction: How to Make an Automatic 12V Battery Charger
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About: Hi my name is Steve and i'm a Creative and I got Technical skills i can build anything just stick to my account . I'm a YouTuber so you also can see my all videos here https://www.youtube.com/SteveWillsonKujur
Hey! everyone My name is Steve.
Today I'm going to show you How to Make a 12v Battery Charger
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
- 24v SMPS - https://goo.gl/4hb3Sj
- Dc to Dc Step Down - https://goo.gl/EM8LF7
- Volt Meter - https://goo.gl/EM8LF7
- Acrylic Sheet - https://goo.gl/EM8LF7
- PCB Stand-Off - https://goo.gl/EM8LF7
- Heat Shrink Tube - https://goo.gl/EM8LF7
- XT60 Connector - https://goo.gl/EM8LF7
- Alligator Clip - https://goo.gl/EM8LF7
- Soldering Iron - https://goo.gl/EM8LF7
- Rubber Bumpers Pad - https://goo.gl/EM8LF7
Aliexpress
- 24v SMPS - https://goo.gl/pFbm59
- Dc to Dc Step Down - https://goo.gl/atZGVC
- Volt Meter - https://goo.gl/atZGVC
- Acrylic Sheet - https://goo.gl/atZGVC
- PCB Stand-Off - https://goo.gl/atZGVC
- Heat Shrink Tube - https://goo.gl/atZGVC
- XT60 Connector - https://goo.gl/atZGVC
- Alligator Clip - https://goo.gl/atZGVC
- Soldering Iron - https://goo.gl/atZGVC
Amazon
- 24v SMPS - http://amzn.to/2wSnT0Y
- Dc to Dc Step Down - http://amzn.to/2yCfbWQ
- Volt Meter - http://amzn.to/2yCfbWQ
- Acrylic Sheet - http://amzn.to/2yCfbWQ
- PCB Stand-Off - http://amzn.to/2yCfbWQ
- Heat Shrink Tube - http://amzn.to/2yCfbWQ
- XT60 Connector - http://amzn.to/2yCfbWQ
- Alligator Clip - http://amzn.to/2yCfbWQ
- Soldering Iron - http://amzn.to/2yCfbWQ
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!
You Just Made It
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