Author Topic: My First SSTC  (Read 532 times)

Offline sjsimmo

  • High Voltage Enthusiast
  • *
  • Posts: 32
  • Karma: +3/-0
  • Australia
    • View Profile
My First SSTC
« on: November 21, 2018, 11:43:46 PM »
Hello!

This post is just to provide some documentation of my old SSTC, which I completed about a year ago.


The SSTC was based on this coil: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?172138
And the finalised circuit looks like this:


The driver circuit is a direct copy of the coil linked, except that the 555 interrupter has been replaced with a simple Audio one that I designed. Some minor faults include the fact that I used a comparator as an op amp (I believe this causes some oscillations, which reduce audio quality). And the current limiting circuit has a small fault, which means that higher input voltages reduce the operating current. This was later modified with a capacitor across the current sensing resistor, to allow more peak current (dodgy, but it works ).
The driver circuit was etched on a hand drawn PCB using a permanent marker, and ammonium persulfate etchant:


And the case was made from 1.5mm aluminium sheet, bent in a vice (with a rubber mallet). For the interrupter I drew the PCB design in MS paint (never could get used to PCB CAD programs... ), and used the toner transfer method to etch the PCB:


The secondary was wound on an automated winding jig (unfortunately I never took a photo of the robot, before it was disassembled), with wire from one of the brake mechanisms in a laser printer. The coil is 90x30mm and has approximately 600 turns.

The primary coil was originally allowed to touch the secondary, until I noticed the racing arcs between the 2 coils , at which point I made the small isolating blocks out of perspex.


The final result was a very small SSTC capable of low quality audia, and about 1-inch sparks with 50 VAC input (the faulty current limiter causes sparks to reduce in length above this voltage).



So that was my first SSTC... now back to the DRSSTC
Feel free to ask if you have any questions (I probably left some stuff out...)
- sjsimmo
« Last Edit: November 21, 2018, 11:50:17 PM by sjsimmo »
I like my food cooked with lightning.

Offline pentode

  • High Voltage Enthusiast
  • *
  • Posts: 29
  • Karma: +2/-0
    • View Profile
    • humourous
Re: My First SSTC
« Reply #1 on: November 23, 2018, 11:18:58 AM »
I wonder why you enclosed your coil in a Faraday cage and did you earth it on the same earth line as the secondary coil ?
"You are what was in your mother's genes
and what was in your father's jeans."

Offline sjsimmo

  • High Voltage Enthusiast
  • *
  • Posts: 32
  • Karma: +3/-0
  • Australia
    • View Profile
Re: My First SSTC
« Reply #2 on: November 26, 2018, 02:28:22 AM »
I entered the tesla coil in a science competition, and so I made the cage to reduce EMI, and to come slightly closer to complying to regulations. Everything (including the cage) is on mains ground. Whilst this is not recommended for large coils, it's much more convenient for small ones :)
I like my food cooked with lightning.

Offline Mads Barnkob

  • Administrator
  • High Voltage Senior
  • *****
  • Posts: 920
  • Karma: +11/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: My First SSTC
« Reply #3 on: November 27, 2018, 08:53:35 AM »
Neat little coil with a good range of hacks and shortcuts to make it run, but nevertheless, getting sparks from your first coil is all that really matters. It is a jump pad into building something bigger and better once you get the craving for longer sparks :)

If you still struggle with finding a easy PCB cad tool, I have used https://www.expresspcb.com/ for many years, its simple and there is no complex libraries, settings etc. but also there is no gerber files, but if you only do toner transfer it is perfect for that. Else check out the recommandations in this thread for other programs: https://highvoltageforum.net/index.php?topic=354.0
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline sjsimmo

  • High Voltage Enthusiast
  • *
  • Posts: 32
  • Karma: +3/-0
  • Australia
    • View Profile
Re: My First SSTC
« Reply #4 on: November 27, 2018, 09:56:16 AM »
Thanks for the links,

I'll definitely have to look into expressPCB, by your description it sounds like it might be just what I've been looking for :)
Although I'm quite happy with some of the results I've managed with MS paint (the PCB file for my DRSSTC driver for example):

An upgrade could be particularly useful for reducing right angle traces, and speeding up the design process.

The step up to DRSSTC is quite large :D , I'd probably recommend to others to build a more complex SSTC before jumping to DRSSTC, but it's a bit late for that now... However the simple SSTC is a good way to learn the basics of how they work, along with some of the basic troubleshooting strategies required for larger coils, without costing too much (approx. 50AUD to make sparks, excluding the variac).
« Last Edit: November 27, 2018, 10:01:11 AM by sjsimmo »
I like my food cooked with lightning.

High Voltage Forum

Re: My First SSTC
« Reply #4 on: November 27, 2018, 09:56:16 AM »

 


* Recent Topics and Posts

post Re: Keep or throw away ?
[Beginners]
Thunderstruck
March 19, 2019, 10:02:41 PM
post Re: Keep or throw away ?
[Beginners]
Hydron
March 19, 2019, 08:14:33 PM
post Re: Keep or throw away ?
[Beginners]
Teravolt
March 19, 2019, 05:12:03 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Experimentonomen
March 19, 2019, 01:32:32 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Mads Barnkob
March 19, 2019, 12:20:34 PM
post Re: Strange gdt waveforms
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
March 19, 2019, 12:15:22 PM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
Mads Barnkob
March 19, 2019, 10:46:50 AM
post Re: Keep or throw away ?
[Beginners]
Thunderstruck
March 19, 2019, 09:11:09 AM
post Re: Keep or throw away ?
[Beginners]
Mads Barnkob
March 19, 2019, 08:24:31 AM
post Re: Keep or throw away ?
[Beginners]
Teravolt
March 19, 2019, 01:51:51 AM
post Re: Keep or throw away ?
[Beginners]
Thunderstruck
March 18, 2019, 09:56:42 PM
post Re: cute-qcw Tesla Coil
[Dual Resonant Solid State Tesla coils]
Weston
March 18, 2019, 07:55:52 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
petespaco
March 18, 2019, 06:11:07 PM
post Re: Strange gdt waveforms
[Dual Resonant Solid State Tesla coils]
Hydron
March 18, 2019, 02:27:35 PM
post Re: cute-qcw Tesla Coil
[Dual Resonant Solid State Tesla coils]
Uspring
March 18, 2019, 12:52:35 PM
post Re: Strange gdt waveforms
[Dual Resonant Solid State Tesla coils]
FilipŠebík
March 18, 2019, 12:22:58 PM
post New small SSTC
[Solid state Tesla coils]
Bambinz
March 18, 2019, 11:46:18 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Bambinz
March 18, 2019, 11:29:02 AM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Mads Barnkob
March 18, 2019, 10:35:04 AM
post Re: Strange gdt waveforms
[Dual Resonant Solid State Tesla coils]
Marty
March 18, 2019, 05:32:43 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Experimentonomen
March 17, 2019, 09:13:47 PM
post Re: DRSSTC Driver Logic
[Dual Resonant Solid State Tesla coils]
Netzpfuscher
March 17, 2019, 04:08:33 PM
post Re: WTB: Large Heatsink with a Baseplate at least 10mm thick
[Sell / Buy / Trade]
Phoenix
March 17, 2019, 02:46:44 PM
post Re: cute-qcw Tesla Coil
[Dual Resonant Solid State Tesla coils]
flyglas
March 17, 2019, 02:21:45 PM
post Re: DRSSTC Driver Logic
[Dual Resonant Solid State Tesla coils]
Laci
March 17, 2019, 01:54:47 PM
post Re: WTB: Large Heatsink with a Baseplate at least 10mm thick
[Sell / Buy / Trade]
Mads Barnkob
March 17, 2019, 10:15:16 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
FilipŠebík
March 17, 2019, 09:33:50 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
Teravolt
March 17, 2019, 05:32:48 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
Thunderstruck
March 17, 2019, 02:39:25 AM
post WTB: Large Heatsink with a Baseplate at least 10mm thick
[Sell / Buy / Trade]
Phoenix
March 16, 2019, 10:06:39 PM
post Re: Large Ferrite Core with IGBT-Brick Driver
[Transformer (ferrite core)]
rikkitikkitavi
March 16, 2019, 08:35:51 PM
post Re: cute-qcw Tesla Coil
[Dual Resonant Solid State Tesla coils]
Weston
March 16, 2019, 08:04:52 PM
post Re: cute-qcw Tesla Coil
[Dual Resonant Solid State Tesla coils]
flyglas
March 16, 2019, 06:44:14 PM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
FilipŠebík
March 16, 2019, 09:57:55 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
Thunderstruck
March 16, 2019, 09:40:55 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
FilipŠebík
March 16, 2019, 08:57:54 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
Thunderstruck
March 16, 2019, 08:46:24 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
FilipŠebík
March 16, 2019, 08:27:24 AM
post Re: UD 2.7C Build
[Dual Resonant Solid State Tesla coils]
Thunderstruck
March 16, 2019, 07:35:58 AM
post GDT Experiments
[Solid state Tesla coils]
Thunderstruck
March 16, 2019, 06:32:36 AM
post cute-qcw Tesla Coil
[Dual Resonant Solid State Tesla coils]
Weston
March 16, 2019, 06:01:44 AM
post Re: Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
Thunderstruck
March 16, 2019, 05:46:38 AM
post Which varnish to use to coat the Secondary?
[Solid state Tesla coils]
FilipŠebík
March 15, 2019, 10:11:53 PM
post Re: Large Ferrite Core with IGBT-Brick Driver
[Transformer (ferrite core)]
Mads Barnkob
March 15, 2019, 10:31:10 AM
post Re: Mechanical QCW !!
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
March 15, 2019, 09:44:59 AM
post Re: Large Ferrite Core with IGBT-Brick Driver
[Transformer (ferrite core)]
Hydron
March 15, 2019, 09:27:48 AM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Mads Barnkob
March 15, 2019, 08:49:01 AM
post Mechanical QCW !!
[Dual Resonant Solid State Tesla coils]
pentode
March 15, 2019, 08:33:23 AM
post Re: Piernas's Fast ZVS Mazzilli Driver
[Transformer (ferrite core)]
neukyhm
March 14, 2019, 11:30:12 PM
post Re: Large Ferrite Core with IGBT-Brick Driver
[Transformer (ferrite core)]
Phoenix
March 14, 2019, 11:18:04 PM

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30