Hi, few days ago I got a broken arc lighter used to ignite gas stove. I thought of taking it a apart and look inside the circuit but as per to my knowledge it is confusing me a lot, I hope you guys will be able to remove my confusion so here is the detail.
Data
It uses 1.5V AA cell to work.
This the schematic that I was able to draw from the circuit.
Now there are two coils in it. One is small and the other is big. Here is a visual pic of it.
Note that I have removed small coil in this pic.
Here is what bottom of the circuit looks like
I know all components but only expect the small coil which has four pins. I tested all its pins but I was not able to understand it inner construction.
Here is the details of small coil.
Pin 1-2 has 7.1 ohms, Pin 2-3 has 8.5 ohms, Pin 3-4 has 81.3 ohms, 1-3 has 1.8 ohms, Pin 2-4 has 72.8 ohms, Pin 3-4 81.3 ohms.
My understanding
It is requested to kindly give me guideline of how this works and it would be very great If you list the steps of its working and also answer my confusion.
If you need any further data, just ask me.
Data
It uses 1.5V AA cell to work.
This the schematic that I was able to draw from the circuit.
Now there are two coils in it. One is small and the other is big. Here is a visual pic of it.
Note that I have removed small coil in this pic.
Here is what bottom of the circuit looks like
I know all components but only expect the small coil which has four pins. I tested all its pins but I was not able to understand it inner construction.
Here is the details of small coil.
Pin 1-2 has 7.1 ohms, Pin 2-3 has 8.5 ohms, Pin 3-4 has 81.3 ohms, 1-3 has 1.8 ohms, Pin 2-4 has 72.8 ohms, Pin 3-4 81.3 ohms.
My understanding
- Positive is connected to pin 1 of small coil and also pin 3is connected to ground using PNP transistor so these two pins would probably contain the primary coil.
- Pin 2 of small coil would me another small auxiliary winding with other terminal as pin 3 so this pin drives the transistor.
- Pin 4 is the high voltage pin as it separated from other pins and also goes to the input of second coil.
- Big coil creates a large voltage probably in thousand by using the input voltage of around 50+ and has a capacitor at its output to create a resonance circuit with it.
- Zener diode is probably used to limit the input voltage of big coil to below 75V
- I know the working of Thyristor.
- How is the small coil internally wired as the measurements i took does not satisfy what I think it is.
- Why gate of Thyristor is connected to its Anode using a zener diode.
- How is the driver circuit of PNP transistor is working.
- How is the driver circuit for Thyristor is working
- What is the purpose of D3 and D4 diodes.
It is requested to kindly give me guideline of how this works and it would be very great If you list the steps of its working and also answer my confusion.
If you need any further data, just ask me.