There are a nice type of soldering iron in the market. It's a DC one. The iron rated at 12V/8W works fine in 9~15V range and gives adjusted temperature.
There is a small adjustable voltage adapter and soldering iron kit available at market at around 300Rs. I've bought one and when i opened it, it was nothing but a 500mA transformer, and some voltage controlling circuitry.
At 12V the 8W iron consumes almost 670mA current and we all know a 500mA transformer actually gives some 400~450mA current. Then I decided to build one driver with an 1Amp transformer so that the iron can be heated at full.
I've used a 12-0-12 transformer of 1Ampere and used a full wave rectifier and a 2200mfd/25V capacitor to get 12V DC. Actually at no load it goes upto 15V. So you can use 16V capacitors also but at your own risk.
I've used MP3 player cabinet for fitting a switch, transformer, Voltage adjusting LM317 circuit, and the output RCA jack and a LED.
The final image of the setup looks very untidy, but it works more efficiently than the purchased one. Now I can get full heat that the iron can give.
Hi arup!, Can an ordinary soldering iron work from 12V using this method?
No. This is for 12V DC soldering irons.
Does it requres any current limit resistor? Can i run it with 12 v lead acid battry directly??
You can directly run it with 12V and there will not be any problem.
can you post a circuit for variable ac voltage from 150v to 260v(1 amp minimum). fan regulator with triac will not work for my purpose. do you have any other circuits?
Use a traditional voltage stabilizer instead.
Hi Arup HOW R U ? I HOPE FINE.DOING A GREAT JOB IN ELECTRONICS. PLEASE POST THE CIRCUIT DIAGRAM OF HOMEMADE DC SOLDERING IRON DRIVER
Most important thing to be kept in mind when working with soldering iron is not to touch the tip of the iron as it is extremely hot. Soldering material used for the purpose is an alloy of tin and lead and is called flux. Before you put solder over the required area, heat up the surface to be soldered by touching the tip of the hot iron. Application of the solder is called "tinning"since percentage of tin is more in the flux. However, flux can be of various types depending upon the things to be soldered. `
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PLEASE POST THE CIRCUIT DIAGRAM OF HOMEMADE DC SOLDERING IRON DRIVE OR SEND IT AT MY EMAIL ID AS I NEED IT. I SHALL BE GRATEFUL TO U
DEAR ARUP:
KINDLY TELL WHICH CONTROLLER U HAVE USED TO CONTROLL THE TEMPERATURE. HOW MUCH CURRENT CAN BE INCREASE BY INCREASING THE TEMPERATURE OF IRON?