Author Topic: My First SSTC  (Read 1565 times)

Offline sjsimmo

  • High Voltage Enthusiast
  • *
  • Posts: 38
  • 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: 36
  • 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 ?
"One small step for man"...
…..because he has Arthritis.
www.retinascope.co.uk

Offline sjsimmo

  • High Voltage Enthusiast
  • *
  • Posts: 38
  • 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 Expert
  • *****
  • Posts: 1323
  • Karma: +21/-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: 38
  • 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: Power MOSFETs with fast recovery body diodes
[Electronic Circuits]
davekni
Today at 08:09:29 PM
post Re: A few (stupidly basic) questions
[Beginners]
Mads Barnkob
Today at 02:53:24 PM
post Re: A few (stupidly basic) questions
[Beginners]
John123
Today at 11:46:07 AM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
John123
Today at 11:40:55 AM
post Re: Power MOSFETs with fast recovery body diodes
[Electronic Circuits]
John123
Today at 11:32:19 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ritaismyconscience
Today at 03:48:55 AM
post Re: Class E SSTC Topology
[Solid State Tesla Coils (SSTC)]
ZakW
April 01, 2020, 09:47:42 PM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
April 01, 2020, 09:31:49 PM
post Re: Power MOSFETs with fast recovery body diodes
[Electronic Circuits]
davekni
April 01, 2020, 08:47:11 PM
post Re: Fishing for atmospheric electricity
[Static Electricity]
johnf
April 01, 2020, 08:45:14 PM
post Re: Homemade HV transformer
[Transformer (Ferrite Core)]
johnf
April 01, 2020, 08:37:29 PM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
davekni
April 01, 2020, 08:24:06 PM
post Re: Pt100 oddities
[Electronic Circuits]
davekni
April 01, 2020, 08:16:59 PM
post Re: Pt100 oddities
[Electronic Circuits]
johnf
April 01, 2020, 07:50:16 PM
post Re: Fishing for atmospheric electricity
[Static Electricity]
haversin
April 01, 2020, 07:42:47 PM
post Re: Homemade HV transformer
[Transformer (Ferrite Core)]
John123
April 01, 2020, 07:39:48 PM
post Re: Fishing for atmospheric electricity
[Static Electricity]
John123
April 01, 2020, 06:07:44 PM
post Photographing/filming high voltage arcs
[DSLR]
John123
April 01, 2020, 05:17:04 PM
post Power MOSFETs with fast recovery body diodes
[Electronic Circuits]
John123
April 01, 2020, 02:01:30 PM
post Re: Pt100 oddities
[Electronic Circuits]
kamelryttarn
April 01, 2020, 01:38:47 PM
post Re: Pt100 oddities
[Electronic Circuits]
T3sl4co1l
April 01, 2020, 12:49:21 PM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
John123
April 01, 2020, 10:29:06 AM
post Pt100 oddities
[Electronic Circuits]
kamelryttarn
April 01, 2020, 09:48:37 AM
post Re: Class E SSTC Topology
[Solid State Tesla Coils (SSTC)]
Weston
April 01, 2020, 07:01:51 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ritaismyconscience
April 01, 2020, 04:15:41 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
April 01, 2020, 04:05:20 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ritaismyconscience
April 01, 2020, 01:51:05 AM
post Re: A few (stupidly basic) questions
[Beginners]
davekni
April 01, 2020, 01:32:54 AM
post Re: Class E SSTC Topology
[Solid State Tesla Coils (SSTC)]
ZakW
March 31, 2020, 11:03:36 PM
post Re: Class E SSTC Topology
[Solid State Tesla Coils (SSTC)]
Weston
March 31, 2020, 10:13:13 PM
post Class E SSTC Topology
[Solid State Tesla Coils (SSTC)]
ZakW
March 31, 2020, 09:15:23 PM
post Re: Homemade HV transformer
[Transformer (Ferrite Core)]
AlexanderHun
March 31, 2020, 12:05:40 PM
post Re: A few (stupidly basic) questions
[Beginners]
Mads Barnkob
March 31, 2020, 08:54:35 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 31, 2020, 04:58:16 AM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
davekni
March 31, 2020, 04:44:05 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ritaismyconscience
March 31, 2020, 01:33:16 AM
post Fishing for atmospheric electricity
[Static Electricity]
haversin
March 31, 2020, 12:48:56 AM
post Re: Corona lockdown thread, tell about your situation
[General Chat]
Mads Barnkob
March 30, 2020, 08:08:54 PM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
John123
March 30, 2020, 07:20:08 PM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 30, 2020, 06:46:02 PM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
davekni
March 30, 2020, 06:35:13 PM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 30, 2020, 05:00:11 PM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
John123
March 30, 2020, 04:30:55 PM
post Re: TVS diode selection for 400v transistor
[Electronic Circuits]
SteveN87
March 30, 2020, 01:16:47 PM
post Re: Conical pulse skip DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Acid Byte
March 30, 2020, 07:23:21 AM
post Re: GDT keeps on killing IGBTs
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ritaismyconscience
March 30, 2020, 06:13:52 AM
post Re: A few (stupidly basic) questions
[Beginners]
MRMILSTAR
March 30, 2020, 05:31:27 AM
post Re: synchronous motors up for bid
[General Chat]
klugesmith
March 30, 2020, 02:55:41 AM
post Re: A few (stupidly basic) questions
[Beginners]
davekni
March 30, 2020, 02:23:23 AM
post Re: Skm100 coil
[Dual Resonant Solid State Tesla coils (DRSSTC)]
oneKone
March 30, 2020, 02:22:33 AM

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 
SimplePortal 2.3.6 © 2008-2014, SimplePortal