Forums | India's Top Technology forum.

navigation start navigation end
Go Back Forums | India's Top Technology forum. > Hardware Zone > General Hardware and Peripherals
Register Forgot Password?

Thread Tools Search this Thread
Old 22-10-12   #1
teh pretendeR!
alive and kicking
Veyron's Avatar

DIY: Pentorch, Filament Bulb to LED Conversion

The Synopsis of Bakra
Last week there was a sale thread (Duracell Pen Torches..!!) posted by Dear @darylemmanuel. I posted in that thread, that a DIY can be done easily to convert the filament torch to LED. As techie people here already know LED is much reliable and uses less power to light up thereby increasing battery life. So i had something in mind for this nonsensical project. What better ways to kill a boring monday putting all important work backstage.

One dear member @honey62022 and OP himself offered it as a freebie. So the torch and an extra bulb which i specially asked for was a gift. I mean I love E for this, bringing like minded techie people across many miles closer.

Tools/Stuff required
1. Soldering iron low wattage one - my preference Soldetron 25 watt , soldering wires and flux
2. Pliers, to break/sacrifice the filament bulb
3. Blade, sharper the better
4. Old Pen, selection is complete improvisation. So do the hunting yourself.
5. A compass/needle
6. A file. (No not that paper folder-wala, File as in wife's nail file) - hope you got my point.
7. couple of wires
8. Most important a LED bulb - white is preferred obviously. Cost about Rs.5 max.

The Procedure
1. Procedure is pretty straight forward. Break the original filament bulb. and install the led bulb on its base by using a soldering iron. Lot of improvisation is needed.

2. As LED I had was smaller in size so it went past through the original hole that holds the filament bulb. So i had to use plastic part of a pen. Using bigger LED can be a possibility but it will drain battery quickly.

3. Let the images do the talking. Enjoy!!

The Bakra

Check the intensity. What a shame for a torch costing that much.



50% of Filament bulb. Please take care while breaking the glass. Using a pliers make it much easier. Remove the glass pieces completely.


The LED I had, had small terminals, so i had to attach piece of wire to it. Also check the tiny hole that i created with a compass at the back of what remains of the filament bulb base.

Check the usage of empty refill of the pen as an insulator to insulate between [+]ive and [-]ive terminals.

Final Product. Filament bulb can be used other way round, but LED has [+]ive and [-]ive terminals. So it has to be used correctly while connecting to the battery. or it won't light up.


Check the usage of the cutout of a pen.


Walla!! The LED torch.


The author, that is me or the website, that is 'E' cannot be held responsible if you try this madness on your own and loose a limb or sight in the process.

On a serious note tread cautiously as glass is involved. Leftover pieces on floor can be hazardous.

Soldering Skills is mandatory for this DIY

Special Thanks - You people are great!!
Thanks for reading

Last edited by Veyron; 23-10-12 at 12:02 AM.
Veyron is offline   Reply With Quote
Old 23-10-12   #2
teh pretendeR!
ॐ D E S P E R T E ࡔ
darylemmanuel's Avatar

Join Date: Dec 2011
Location: Aquem-Alto, Margao, Goa
Posts: 133
darylemmanuel is very Notable
Re: DIY: Pentorch, Filament Bulb to LED Conversion

nice work..!! keep it up... Anything that saves energy is worth doing...

__________________________________________________ _______________________________________________________________________________________
"ex tenebris ad lucem" ]

darylemmanuel is offline   Reply With Quote
Old 25-10-12   #3
teh priesT!
[E]ddicted !
mohitgamer's Avatar

Join Date: Sep 2010
Location: Gurgaon
Posts: 915
mohitgamer is highly Reputablemohitgamer is highly Reputablemohitgamer is highly Reputable
Re: DIY: Pentorch, Filament Bulb to LED Conversion

Nice Work !! Thnx for Sharing...
mohitgamer is offline   Reply With Quote
Post New Thread  Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTBOther Rubber Bulb Blower SOUMITRA12 Closed/Completed Deals 7 29-06-12 10:00 PM
Rubber Bulb Blower SOUMITRA12 Everything Under the Sun 4 17-06-12 06:20 AM
WTBOther Rubber Bulb Blower SOUMITRA12 Closed/Completed Deals 0 16-06-12 10:40 PM
Need Help In Video Conversion uniquegamer Applications 13 01-06-12 07:22 PM
Help! Pagemaker to PDF Conversion mick_ralte Applications 5 21-12-09 09:10 AM

bulb, conversion, diy, filament, led, pentorch
All times are GMT +5.5. The time now is 01:45 PM.
Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0 PL2 ©2011, Crawlability, Inc.