This is a simple instructable and I am going to share you how I made this little DIY to make a zero cost torch with a power bank. Following the simple instructions, you can make it easier.
Step 1: Collect the Raw Materials.
For the project, you need:
- PVC pipe (small piece with diameter as per your wish, I used one with a small diameter)
- A dead CFL light bulb.
- A small piece of universal PCB.
- A white color LED.
- Push button switch.
- Push button cap.
- A power bank battery. (technically, A 18650 battery with 3.7 V 2200 mAh battery). (From old power bank)
- A 5 V DC boost converter. ( From old power bank).
- Aluminium foil.
- Thick paper.
Step 2: Make the Body.
Making the body is not that complex. Follow the steps:
- Remove the top part of the CFL.
- Remove the cap of the CFL as shown in the figure.
- Now heat one end of the PVC pipe and join it to the CFL cap.
- For the reflection Make a cone using the Aluminium foil and the thick paper.
- Attach the LED on the cone as shown the figure.
- Cut some transparent plastic in a circle and attach it to the front of the LED.
Now the main body and the front reflector are ready.
Step 3: Make the Switch, USB Part
For the switch and USB,
- Mark on the pipe, as shown in the figures.
- Cut the portions for the switch and the USB port.
Step 4: The Circuit Part.
The circuit part is simple.
- Solder the battery to the boost converter.
- Solder a red wire (+ve) and a black wire(-ve) to the USB port of the Boost converter. These wires provide the power needed to light the LED.
- Insert the battery and the boost converter into the pipe and fix the battery using a double-sided tape.
- Fix the USB port in position.
- Take the wires out.
Step 5: The Switch...
Switch consists of a universal PCB and a Push button switch soldered on it.Then solder the boost converter's positive wire(the red one) to one leg of the push button.
Step 6: Complete the Circuit.
- Solder the positive wire of the LED to the push button's leg.
- Solder the negative wire of the LED to the negative of boost converter.
- Place the PCB in the place.
- Cover the part with the button cap as shown.
The entire circuit and body works are completed.
Step 7: Finishing Work.
You can use spray paint for the finishing work. I used some black stickers for the purpose.
We can recharge it using a smart phone charger and this can be used as a torch and as a power bank.
Thanks for your time.
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