Transforming a 24V Bike Headlight Into a 4.2V Device!

Today, we are going to transform this 24-volt bike headlight into a 4.2-volt device!

The Problem:

I have a 24-volt bike headlight that was bought by my uncle. The problem is that the headlight he bought requires a 24-volt battery to power up. In order for me to use it, I had to transform it into a 4.2-volt device.

VIDEO TUTORIAL:

Let's start with the things that you will need. You'll need a 24-volt bike headlight, a battery charger module, three pieces of LED lights, three pieces of 6.2-ohm/1-watt resistors, and lastly, the star of the show, which is the 18650 battery.

• 24-volt bike headlight
• battery charger module
• LED Lights
• 6.2-ohm/1-watt resistors
• 18650 battery

Tools Required:

• Soldering Iron
• Soldering Lead
• Tweezers
• Desoldering Pump
• Solder Paste
• Wire Cutter
• Wire
• Solid Wire
• Black spray paint

Let's start by opening the bike headlight and removing all the unnecessary components inside. The only components that should be left are the switch and the protective glass.

Next, we are going to paint it to make it look nicer using black spray paint.

While we wait for the paint to dry, we will work with the LEDs. We will remove the old PCB from the protective glass and then place the LEDs inside the protective glass. We will secure them in place using adhesive.

After that, it's time to put the 6.2-ohm resistor in each LED, and I will use a solid wire to connect all the positive and negative polarities of the LEDs.

Now that the paint is already dry, it's time to put all the components inside.

Now that the paint is already dry, it's time to put all the components inside. We'll start with the LEDs, followed by the battery charger module. We will make a hole in the case of the bike headlight to provide a way for the Type-C charger to plug into the charger module. Next, we will solder the positive and negative sides of the 18650 battery to the charger module. To prevent short circuits, I covered both ends of the 18650 battery with electrical tape.

Next, it's time to put it into the case of the bike headlight. I used adhesive to hold the charger module in place.

After that, I closed it using screws. 

Now, as you can see, after I plug in the Type-C charger, the red LED turns on. Once it is fully charged, the blue LED of the charger module will turn on.

And that's how you transform the 24V Bike Headlight into a 4.2V device!

And as always, keep learning and have fun! Byiee!