A Layman’s Guide To A Homemade Car Battery Charger


It can often be daunting (or exciting) to experience the art and science of crafting things with your own hands. Some people can relate to this when it comes to having the opportunity to do their own house or vehicle repairs. But, possessing the ability and confidence to handle tools that can be useful to everyday life is a great skill to acquire or have.

It takes some patience, an open mind and perhaps, more than anything, a willingness to try out and fail on some stuff. With that said, you might be interested in learning what is important with regards to making a homemade car battery charger.

The central thing that is vital for making a homemade car battery charger is having a transformer, ideally one with a center tap that can produce a 6-Volt to the 12-volt range. So, above all things, do not forget this important step as it will function as the foundation for the rest of the process.

With that laid out, the importance of this transformer is that you need this as a core to making a circuit, which is the hub to generate and transfer the electricity for a charge in your vehicle.

So, in general, it all comes back to this setup (the transformer) when it comes to forming your own circuit and creating your own homemade car battery charger. There are many methods by this point but if you are interested in knowing more, the rest of this article provides some nifty and relatively simple advice in getting you to that process safely.

This does not have to be the end all be all, but this can come in handy when you are in situations that call for a quick charge or what people in the community call a ‘trickle charge’.

Overview Of Materials Needed For A Homemade Car Battery Charger Circuit
Okay, so as an overview, you will need some kind of:

1. Base Platform to hold materials
2. Material pieces to hold mount on and off the switch
3. A Bridge Rectifier and a Cord and some clips
4. A Glue Gun, some soldering Iron, and some screws

Some of these materials can often become a hassle to get when you do not know your way around the process. That said, these are important when eventually setting up your transformer’s circuit. The base platform (which can be anything pliable or durable) acts material to hold the whole circuit together.

Often, materials like plywood can be used for this since it is often common in many households. Pieces that hold a particular mount can be tricky but experts often use a steel or aluminum type angle piece in order to get this part of the job done.

The Bridge rectifier, cord, and clips are used for the management of the voltage that will pass through. As with any manual or household garage job, glue guns and screws and some iron are often standard procedure items to have to finish the job well.

Homemade Car Battery Charger Advice


The advice involved with using the transformer, creating a circuit can be found here. So, you can take note of them as you go through your own process:

1. First off, you have to mount the transformer and attach a line cord. The plywood base can be made through the use of screws. Proceed to solder the ends of the cord to the transformer’s primary terminals. In this step, a hot glue gun can be very helpful in creating a relief or sticking or joining these materials. Like a good house wall painting session, remember to administer patience and take your time letting the relief set in and solidify properly.

2. Secondly, have a mounted switch wired. The transformer’s secondary terminals must be wired to the switch. Steel or aluminum angle is held at the base with screws. Remember, this is or a switch, so it is paramount that you label the positions of the switch or 6 and 12 volts, appropriately.

3. Third, let us now wire the rectifier. This is often called a bridge rectifier and it can save a lot of fuss and hassle if you have one ready or use. Other than that, a bridge rectifier also needs a base of support like the transformer. You can, of course, use glue for this process. Be careful of producing too much heat in the process and thus, a heat sink can be used when soldering diodes like these. For the AC (input) and DC (output) cords, you can bend them in different directions. Clips with colors can be used in order to know which terminal is which.

Using A Homemade Car Battery Charger

Given a good setup, the formation of a circuit using a transformer should be enough to create a sufficient charge for the given task of charging a car battery.

This said, it can be helpful to pay some attention to these observations:

– Make sure to select 12 volts or 6 volts with the switch.
– Remember to connect a given clip of designated color to the same terminal (black clip to black battery terminal or red clip to a red battery terminal).
– Do keep a lid on how long you let a power cord be plugged in. A standard time to look out for is twelve hours.
– Do not forget to disconnect the clips from the battery. This will often prevent sparking that could possibly ignite something unfortunate instead of appropriate charging.

All that said, aside from the above observations it pays dividends to take one’s time when it comes to gathering materials for the setup of a homemade car battery charger.

You can never be too sure whether there are new alternatives when it comes to helping manage the process better. Often, without the right materials for the job, the task itself will prove to be a difficult one.

Despite this, there are many different ways of making a homemade car battery charger. Hopefully, this is one that can help you accomplish that very task.

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