How to make a soldering iron with a 6 volts battery.

Picture of How to make a soldering iron with a 6 volts battery.
Hi, friends!
today i am showing you how to make a soldering iron from a 6v battery.
this is the easier way and the safest method ! it gets hot up-to 60 degree C in only 10 seconds.
here is the picture of it! i consist of two wires + and - .
the blue  and yellow  stuff is your soldering iron and the black wire is the negative terminal.
it's whole cost is only 6 or 7 dollars depending on the cost of battery!  and if you have a 6 or more volts battery then the expense will be reduced to only 4 dollars or 20 indian rupees! it's very very affordable!
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Step 1: Stuff you need

Picture of Stuff you need
The stuff  you will need is very cheap and easily available at any corner shop!
1. A Pencil. ( a common HB pencil. you have to remove it's wooden casing and  take out a long graphite from it. )

2. A sketch pen .  ( cut it half )

3. An  hollow  iron tube . ( the iron tube should be selected in a manner that the graphite lead can be easily inserted and can hold it tightly. )

4. Two long wires ( you can  increase or decrease it's length as per your need or availability. And the wire slould be thick enough 0.75mm so that it can hold the current passing from it.)

5. a 6 or 12 volt battery ( a 6 volts battery is good enough to make this but don't use any direct power supply it will decrease it's performance.  )

6 . A good quality paper. ( don't use a magazine paper use a simple rough and good quality paper like a times news paper. )

5. tools pliers , tapes ( it's good to use a head resistant tape. ) , a pair scissors.

               Caution : Don't dare in your dreams to connect it from a common household 220volts ac or dc supply. if you will try to        do this i am not responsible for your death!
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hey kid can u make a proper schematic for yr project ....
its too boring to read all instructions :P...
samaddon (author)  manny1230075 days ago

Do i look like kid? okay yes i do but i am 17 , and there's no schematic you just need to connect the battery and graphite rod in series!

simba123 days ago
Very nice instructables!!! But can we use other battteries except 6 or 12 volt batteries maybe some AA batteries connected
For how much you got the 6v battery in india?
Can i use silver foil instead of paper?
samaddon (author)  ankit.agrawal.3114931 month ago

Nope paper is for therman insulation. And a 6V battery is about 350INR.

ThopegowdaY1 month ago

nice and cool.i will try making it .but i did not find a hollow tube can i use from an aluminium can

hkumar283 months ago
Here is my solder
samaddon (author)  hkumar283 months ago

it will never get that hot with a battery so low on amps you need a battery with high amps dude!

simba1 samaddon3 months ago

how many amps does it require??????

samaddon (author)  simba13 months ago

Never measured it though!

samaddon (author)  simba13 months ago

Around 1A @ 6volts!

sizzic8 months ago
could you use a 9 volt battery?
samaddon (author)  sizzic3 months ago


hkumar283 months ago
I tried to make it
But my graphite is not getting enough hot to melt the soldering wire
I am using a
9v battery
DebobrataS5 months ago

Where do I find a hollow iron tube that small?!?!

JohnD167 months ago

dose it half to be metal or can it be a pencil casing with tin foil

could you be a little more specific on your words??

NisargIngole9 months ago
4 dollars isn't 20 indian rupees but almost 270 indian rupees
alexx2210 months ago

Thanks for sharing your idea :D I will try to make one for uotdoor soldering.

can we use 5volt mobile charger instead of 6volt battery??

can we use 5volt mobile charger instead of 6volt battery??

smiri1 year ago
Good Job!!
pranjal21 year ago

can i use aluminium rod instead of iron rod??

kishore1361 year ago
can we use a 9vt 20rs battery??
wat do u mean by neg??
samaddon (author)  kishore1361 year ago

by neg i mean negative . Now about the batteries you can use a 6v 2000mah battery.

muddog151 year ago

Guys.. Shorting out battery's is dangerous. A man changing out his smoke alarm battery's lost his house because he put all the battery's in bag for recycling, and the terminals on the battery's touched and within 30 minutes his house was in flames. This is not safe people, don't do it.

samaddon (author)  muddog151 year ago


The batteries are connected with a load having very high resistance (graphite) so tell me where iam shorting those batteries??

But thanks for you concern.

pranjal21 year ago

do u think it will work to solder wires like real solders??

kishore1361 year ago
can i buy a mechanical pencil's refill (5mm) bcoz i cudnt take the lead out form the pencil.i tried it many times.
asdk1 year ago
pober2 years ago
will this work if i use a power transformer? like 220 to 12 volt, will that be save? and what if i use 4 1.5 volt battery's?
samaddon (author)  pober2 years ago
Using it with a transformer is a better with cause it serves more Amps but the transformer will get hot i you will use for along time. And how come you got a 41.5 volts battery did you connected the in series if so it's not that safe for the battery's life and if this battery came assembled from the factory you did not connected them in series by yourself then you can use the but i really say don't use a high voltage cause it's dangerous the Lead can blow off hurting you . I must prefer you to use a a 6v to 19 volts batter with good amps but not much amps.
Good! but hey man,4 dollars is not equal to 20 Rupees like you said.One dollar is about 55 Indian Rupees.Do the math.
samaddon (author)  Adarsh_tronix2 years ago
Hello Sir and thanks for commenting! first i am not a man cause i am only 15 ! and I may tell you if you are going to buy the required stuff in india for this project it will cost you around 20 rupees cause i live in india and if you are going to buy one from u.s it will cost around 4 dollars cause i am familiar with these countries !
J-Five2 years ago
Pure Genius!!!!
samaddon (author)  J-Five2 years ago
Thanks ! for commenting!
J-Five samaddon2 years ago
Very resourceful!!!
I have two soldering irons and can never find the stupid things, it's very handy to know I have an alternative for when I give up the search!
samaddon (author)  rabidpotatochip2 years ago

all you need is a 6VOLTS BATTERY , 1 HB PENCIL (perhaps you have used it in your primary school) , sketch pen and two long wire! if this stuff is not available in your local area the your area is a very very remote are cause these things are too handy and easily available ! and Thanks for commenting!! and by the way this is for those who don't have one i made it cause i don't have it as i am a child !
love the way you put this together? how long does the soldering iron last?
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