I tried building an induction coil

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The discussion revolves around the construction and performance of an induction coil, with a primary coil of 213 turns and a secondary coil of 1,266 turns. The user reports low output voltage readings, ranging from 16.5 millivolts to as low as 200 microvolts, and seeks advice on improving the design. Key recommendations include ensuring proper connections in the circuit, using a flyback diode to protect the transistor, and adjusting component values for better performance. The user also experiences issues with a lithium-ion battery, which appears to have been damaged due to excessive current draw. Overall, the conversation emphasizes the importance of accurate schematics and component specifications for troubleshooting and enhancing the induction coil's functionality.
  • #31
David lopez said:
i taped wires to the 18650 lithium ion cells, connecting 4 lithium ion cells in series. the 6 ohm resistor was connected to 4 18650 lithium ion cells in series.
It's still not obvious what you are doing here but it looks as if your short circuit current was Four times the 600mA I suggested, which means a 2.4A drain on your cells to start with. This may mean you have exceeded the 1C discharge rate (depending).

Taking the cells our of the box means that there is none of the protection that you get within the battery .

That suggests your contact may not be good and that you now have a high resistance contact with your wires. Did you try Solder?

Do you seriously have a problem supplying PF with a decent schematic diagram? If you are trying to self-educate then IT is a topic that you could benefit from.
 
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  • #32
Drawing.jpeg


is this a proper schematic . i was alternately disconnecting and connecting wires.
 
  • #33
David lopez said:
is this a proper schematic
Much better thanks.
Did you ever look at designs for induction coil circuits? They include a Capacitor to increase the Primary pulse voltage due to resonance. You put the C across the opening contact gap.
 
  • #34
i tried looking for websites that explain how to design a induction coils. could you show me a schematic of an induction coil circuit.
 
  • #35
David lopez said:
i tried looking for websites that explain how to design a induction coils. could you show me a schematic of an induction coil circuit.
Another thing that could help your iT skills would be more practice with search engines. Asking PF is not the best way forward. Search with the terms in your last post and you should get somewhere. PF is not a spoon feeding service and I think this point has been made to you already.
 
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