Do not underestimate the effort of desoldering and soldering, though. It took me about a day altogether to finish the project.
Step 1: Project Overview
As I intend to use the torch mainly with rechargeable batteries, I calculated the following circuit for 9.2 - 9.4 Volts, which is the typical voltage of two batteries.
Most LEDs could be set in parallel and driven with a single resistor, but i use 7 resistors with each LED. All LEDs need 300 - 400 mAh, so I divided them up with one resistor each.
Depending on the types and amounts of LEDs you are using, you may need different resistors. This LED resistor calculator may help you on your way.
Step 2: Gather All the Stuff
-Heat Sinks (7)
-LEDs 1watt (7)
-0.33 ohm resistors (7)
-0.7ohm 1/8w resistor (1)
-1N4001 50v 1A Diode (1)
-5mm led (1)
-4.7 v batteries (2)
-Charging Jack (1)
-Toggle switch (1)
-Wire roles RED + WHITE (1)
-Fat pin converter (1)
-2 way Connector (1)
For tools I used:
-Heat Shrink Sleeves
Step 3: Preparing Bottle & Batteries
This will also work for your next projects, and you can charge it from any Nokia Mobile Charger. Isn't it great.
Step 4: Preparing Torch and Charging System
With the shaft's position thus defined, the wiring would barely fit on top. To fit the switch inside low enough I had to carve away some of the plastic with a sander.Use super glue for adding LED and converter, and then the bottle gets shape something like a funny toy.
But be-careful.Safety First.
Step 5: Adding the LEDs
Take two wire connector and sold red + wire to resistors and black - wire to all the wires you have sold together.
You have now madded this LEDs part.
Step 6: Testing Torch and Charging Jack
Also check your charging jack by inserting several chargers.I have tested it with almost 8-9 chargers ,and it didn't showed up any problem.
You can see that i have also added a 5mm LED to check charging situation.
Step 7: Assembling Torch
3-add charging jack with connector
4-add 5mm LED
5-Attach the two way connector
6-add the bottle cap
This is all.it's so simple.
Step 8: All Done
And you have done it all.....enjoy & don't forget to comment.