Induction heating is the process of heating an electrically conducting object by electromagnetic induction, through heat generated in the object by eddy currents. 

An induction heater consists of an electromagnet and an electronic oscillator that passes a high-frequency alternating current through the electromagnet.you will get full explanation about 12v induction heater Circuit Diagram below and with only a few modifications we can use same circuit for a Induction Soldering Iron ( 2nd Circuit ). you can watch video for both the circuits for details.

12v Induction Heater Circuit Diagram

12v induction heater circuit diagram
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This circuit automatically turn on at night and turn off at day time. Finally, after searching through numerous circuits the internet, I figured that an effective, small and cheap circuit could be designed with ease. The circuit works on 220v AC It  Continue Reading….

Parts List For Induction Heater Circuit

. Mosfet IRFZ44N or IRF540   2pc
. Resistor  R1-R2 330 to 470 ohm 2pc, R3-R4 10k 2pc all 1/4watt
. Diode D1-D2 UF4007 2pc or 1N4007
. Capacitor C1 .47uf to 2.2uf 600v/1000v (Not less than 600V)
otherwise Mosfet will Heat . Detail about inductor and Coil in video

12v Induction Heater Circuit Diagram Explanation

I used a simple push-pull oscillator circuit or the so-called ZVS driver.It is also often used in amateur structures of induction heaters.The scheme (circuit) is so popular that there is lots of Chinese production

The optimum power supply voltage is 12V, although worked from 3.5V. The power supply should be sufficient to trigger the FETs.

I used the N- channel IRFZ44. Gate resistors limit the gate current . By changing the parameters of these components the working frequency of the generator can be changed.

As I have said before, the scheme often used for constructing simple induction heaters, although it is not an optimal due to the absence of the scheme for FETs regulation and good oscillator.

Large currents flow through the circuit, and the capacitor is also operated in hard conditions.Particularly, if the circuit is used as an induction heater, i.e. if the core is absent or it is not closed.

Therefore, I advise you to use a battery of capacitors connected in parallel with a total capacity of 1 to 4.7 microfarads and voltage of 630 to 1600V. Optimally is 1000V. 

Practice shows that 400V, not enough.In the case of the capacitor bank, all should
have the same capacity and voltage. you can make a core with 7 to 10 turn with 1mm copper wire

How To Make 12V Induction Heater Circuit Watch The Video

Induction Soldering Iron Circuit Diagram

With The Help of the same circuit you can make a simple small and powerful  Induction Soldering Iron

How To Make Induction Soldering Iron Step By Step

For Details, you can Watch My video How to make induction soldering iron

  1. First you need a toroid for coil you can use any types of toroid I am using a toroid from old laptop charger
toroid for indcution soldring iron

2. For making a Primary Coil you need 2.5 mm or 10AWG wire around 2 feet, I Didn’t find so I used 6- 24AWG wire around .51mm in parallel  and wind Total 6 Turn with center taped means 3 turn+3turn & for second coil you can use 40-200uh coil I wind 25turn of 24AWG wire on a toroid ( Toroid From Old CFL)

induction soldring iron toroid coil

3. For Secondary Coil you can use same 2.5mm 10AWG wire Or you can use 1mm 18AWG 3 wires in Parallel as I used in video only single Turn needed

induction soldring iron

Induction Soldering Iron Circuit Diagram

You can use same circuit ( Induction Heater Circuit ) with only a few modifications for induction soldering iron circuit

Induction Soldering Iron Circuit Diagram

How To Make Induction Soldering Iron Watch Video For Details