My first circuit with Mosfets. I used two for this project, scary as I had only used BJT’s (bipolar power transistors) before, mainly 2N3055’s and TIP35c’s.
Another new component a 90mH inductor to protect my circuit and supply from high voltage spikes, if I understand its function correctly. Its built around the Mazilli ZVS (zero voltage switching) driver circuit. I like it because it switches when the Mosfets are at zero. This zero voltage switching means the Mosfets will run cooler which is a great help for preserving the Mosfets and the project. I have managed to get the Flyback itself to run cooler by removing the metal clip around the ferrite core. After feeling how hot my primary turns would get and looking at a induction heating circuit using a driver circuit just like mine, I realised the heat being generated was by the metal clip itself. The clip was heating as metal would if it were in that primary coil instead of the ferrite core.
My SSTC (solid state Tesla coil) is looking good with some extra pressure.
All this time I have been playing with 0 to 32 volts, with up to 10 amperes at my disposal. I never drew more than a few amps which is good as the TIP35c can only handle up to 5 amps at its base.
Now I can go up to 60 volts with a 3 amp limitation which is good, so as long as I do not let the transistor get to hot I won’t fry and kill it.
I will have to find another amp from somewhere to get the full 60 volts. Maybe I could use an old microwave transformer and rewind the secondary 25 turns aside a center tap for 70 volts rectified DC. It might allow that extra amp or so, keeping in mind temperature and that the TIP35c
I did it I changed the primary coil for four turns instead of two and now I can use 60 volts at 3 amps. This works good for my Electron Flower effect (that’s what I call it) not so good for the flat plate breakout as it uses 3 amps at 16 volts.
Building the Slayer Exciter circuit has been a great project. It is so much fun You get arc’s, wireless electricity, electron display and Ion motors. This is a must build even the tiny Exciter circuit is fun. I made one using a 2N2222, resistor, LED and the primary and secondary coils. **Link to be added**
This circuit is the second TIP35c circuit I built. My first I kept blowing the transistor pushing more than 12 – 14 volts through it. This TIP35c I can not seem to fry even at 31.6 volts. I imagine if I ran it longer than I do, it would.
Anyway’s this configuration works quite well. I restrict the current to less than 5 amps normally around 3 at the supply because I want to see what it will preform like with just 3. It is happy with higher than 3 but the data sheet says no more than 5 at the base. TIP35C Datasheet
Take a look at the video’s, tell me what you think.
The SSTC or Slayer Exciter is a great weekend project. It use’s very few components. Two coils, a transistor and heat sink, a diode and a resistor.
The hardest part is winding the coil, its not really hard just a bit boring. Saying that it is worth taking your time and getting it right.
I used a Primary coil of two turns of 30 amp mains wire, a secondary on PVC 75mm pipe of around 1200 turns .27 magnet wire, a TIP35c transistor, a LED and a 4.6K resistor. Fix the transistor to a decent sized heat sink helps keep it cool running at 12 volts+.
When winding my secondary I paused and put sticky tape on so it would not unwind. Varnish is good after winding.
I have made a baby slayer circuit and the layout is basically the same. Fist video shows schematic of baby using 2n2222, its a good place to start as swapping out those transistors takes seconds on a socket board.
This video is using the TIP35c and is the one written about above.
Wait there is more..
Anyway’s I hope you enjoyed this post and make the project it really is fun and a great weekend project.