Many students out there reach me through emails or social media channel that they have made a tesla coil ( slayer excitor ) using any popular circuit but that’s not working. Here are 5 common mistakes that I found followed by my suggestions on them.
The five common mistakes are –
- Low Battery
- Faulty Transistor
- Winding Of Coils
- Top Load
- Proper Checking Of Tesla Coil
First of all make sure that you have made all your connections according to the circuit diagram.
- If your tesla coil is not working and you are using battery as a power source then the first thing you should check is battery’s voltage.it should be 8V or above.
- I suggest you to use transformer or SMPS ( Switch Mode Power Supply ) as power supply for tesla coil.
- Semiconductor devices like transistor blow up very easily if mishandled. You can check it in multi meter or simply replace it. Transistors getting warm is normal but it should not overheat.
- For high power input use any of these listed transistor with a heat sink.
- 2n2222a ( for 9v Battery )
Winding of coils
- Wind the coils as close as possible and do not overlap.
- Make sure that the direction of primary winding and secondary winding are opposite to one another. You can simply invert the end of primary coil that is connected to circuit.
- Make sure to scratch off the insulation of secondary wire ( magnet wire ) when the lower end is attached to circuit or when the upper end is attached to top load.
- Students usually use heavy metals for top load.
- If you are using a very lower power source such as battery then make sure you use a very lite weight top load. Make it using aluminium foil. Take a ping pong ball and wrap it with aluminium foil. Ensure the surface to be smooth as possible.
Proper checking of tesla coil
- Students to admire the working of their coil mostly use LED’s in excitement but that doesn’t glow until your tesla coil is powerful.
- Many time it happens that the fluorescent lamp that you use is itself leaked or dead. I suggest you to use new lamps or check by bringing electric tester near the top load.
- Small neon bulbs glow beautifully.
Wire gauge and winding suggestion
- Suggested wire gauge
- 28 to 38 gauge
- Number of turns in primary
- 2 to 5 turns
- Number of turns in secondary
- 300 to 3000 turns