Author Topic: Problem with small Tesla Coil  (Read 932 times)

Offline Luca

  • High Voltage Enthusiast
  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Problem with small Tesla Coil
« on: February 13, 2023, 09:49:54 PM »
Good day everyone
I am seeing a lot of awesom videos of Tesla Coils playing music on the internet.
I am really fascinated! And want to make one.
I do not have a lot of practical experience with electronics. Especially not with high Frequencies.
A lot of people say i should start small and simple.
So I found a circuit on the internet (Attachment 2) an designed it on EasyEDA and made it into a PCB (Attachement 3).
I have now soldered all the components and it doesn't work :(
When i power up the circuit with 15V it pulls around 0.06A and no sparks are jumping from the Top of the secondary, which for me would mean that the resonance is not building up correctly ¯\_(ツ)_/¯.
Can anyone help. I have checked all components and i cannot find the problen.
I would be happy for any help.
Thank you

Offline davekni

  • Executive Board Member
  • *******
  • Posts: 2799
  • Karma: +133/-1
  • Physicist, engineer (electronic), and hobbiest
    • View Profile
Re: Problem with small Tesla Coil
« Reply #1 on: February 14, 2023, 02:30:16 AM »
Quote
I am seeing a lot of awesom videos of Tesla Coils playing music on the internet.
I am really fascinated! And want to make one.
I do not have a lot of practical experience with electronics. Especially not with high Frequencies.
Yes, musical coils are a lot of fun.  Also require a lot of work, often multiple attempts and iterations of replacing failed parts.  Be prepared for a long path if you proceed.

Quote
A lot of people say i should start small and simple.
Yes, generally good advice.  Down side is that really simple circuits tend to be finicky.  Often depend on characteristics of one brand of part or one board layout and wire length, etc.  Once someone gets a simple circuit working, they post it.  A few people will get lucky with copying it and it works immediately.  Many others will give up or get it working only after many tweaks.

Quote
Can anyone help. I have checked all components and i cannot find the problen.
First, are you familiar with positive feedback (instability/oscillation) and negative feedback (steady stable current/voltage)?  For oscillation, positive feedback is necessary.  May require reversing primary coil direction (swapping leads).

If swapping phase isn't sufficient, there are many manufacturers of TIP31C.  It is a VERY old part that's been copied many times.  Initially a low frequency low gain transistor.  Some versions are higher gain and faster.  The initial example build may have used a faster higher-gain part.  Also, likely relying on TIP31C capacitance to tune primary.  Parts vary in capacitance too.  May require additional capacitor collector to emitter for tuning.

Circuit has no bypass capacitor.  Makes tuning very sensitive to lead length to power supply.  Circuits should have capacitors across incoming supply voltage, 15V in your case.

Have fun experimenting.
David Knierim

Offline Rafft

  • High Voltage Technician
  • ***
  • Posts: 148
  • Karma: +3/-0
  • Electronics Hobbyist - HV n00b - FPV Dr0n3 Pil0t
    • View Profile
Re: Problem with small Tesla Coil
« Reply #2 on: February 14, 2023, 04:00:43 AM »
Good day everyone
I am seeing a lot of awesom videos of Tesla Coils playing music on the internet.
I am really fascinated! And want to make one.
I do not have a lot of practical experience with electronics. Especially not with high Frequencies.
A lot of people say i should start small and simple.
So I found a circuit on the internet (Attachment 2) an designed it on EasyEDA and made it into a PCB (Attachement 3).
I have now soldered all the components and it doesn't work :(
When i power up the circuit with 15V it pulls around 0.06A and no sparks are jumping from the Top of the secondary, which for me would mean that the resonance is not building up correctly ¯\_(ツ)_/¯.
Can anyone help. I have checked all components and i cannot find the problen.
I would be happy for any help.
Thank you

You could check your primary winding connections?
SGTC / SSTC / DR-SSTC / QCW

Offline Luca

  • High Voltage Enthusiast
  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Re: Problem with small Tesla Coil
« Reply #3 on: February 17, 2023, 12:55:25 PM »
Good Day
Thank you for your quick reply.
I have now swapped the primary polarity and it now works... kinda.
When i bring an object near the breakoutpoint some verry small sparks start flying.
When taking it away, the sparks stop. Afittionally i have a light in my room which is touch sensitive, and it also started to flicker when playing with the sparks. I did not think such a small coil could do that, AWESOM!
But i see other people in the internet getting about 7-8mm sparks from this circuit.
You mentionned adding a capacitor, how do i determine the capacity and voltage of this capacitor?
Would you just buy a few and try which one works best, or is there another way to determine its value?
Why connect it between collector and emitter? I dont se the purpous there, shouldnt it be between the two primary coil terminals?
I want to experiment with this coil a bit. Do you have any other ideas on how to optimise it?
Could i add a ferrite core to conduct the magnetic field from the primary to the secondary better?
Why doesnt anyone have toploads on such small coils, wouldnt it help?

Yes, i know what positive and negative feedback is and i think i understand the basics of resonance.

I have another question unrelated this post.
Why does the primary current in a spark gap tc not build up so high, that it melts the primary coil?
Shouldnt it theoretically build up into infinity? Why not?

Once again, im thankful for any help.
Im sorry for my ignorence if i dont understand something.
Kind regards
Luca


Offline davekni

  • Executive Board Member
  • *******
  • Posts: 2799
  • Karma: +133/-1
  • Physicist, engineer (electronic), and hobbiest
    • View Profile
Re: Problem with small Tesla Coil
« Reply #4 on: February 17, 2023, 08:41:15 PM »
First priority is to add a capacitor across 15V input (bypass capacitor).  Film or ceramic, 0.1uF or higher.

Then learn about analog circuits.  One good way is through simulation.  There are free online simulators and downloadable ones.  My favorite is LTSpice.  Simulate a spark gap coil to see how it works.
David Knierim

High Voltage Forum

Re: Problem with small Tesla Coil
« Reply #4 on: February 17, 2023, 08:41:15 PM »

 


* Recent Topics and Posts

post Re: Pulse Power High Current Discharges from 3 Phase PFC Capacitors
[Capacitor Banks]
MRMILSTAR
Today at 05:22:43 AM
post Re: Want to build HV HF oscilloscope probe.
[Electronic Circuits]
Twospoons
Today at 05:08:46 AM
post Re: Pulse Power High Current Discharges from 3 Phase PFC Capacitors
[Capacitor Banks]
davekni
Today at 04:49:16 AM
post Re: Ring Launcher AC vs DC?
[Induction Launchers, Coil Guns and Rails guns]
FPS
Today at 03:55:37 AM
post Re: Want to build HV HF oscilloscope probe.
[Electronic Circuits]
klugesmith
Today at 02:48:22 AM
post Re: Want to build HV HF oscilloscope probe.
[Electronic Circuits]
Domo
Today at 02:05:05 AM
post Re: Plasma Torid - Class E Self Resonant Dual/Stereo - Plasma Torid Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
Today at 01:43:10 AM
post Re: Want to build HV HF oscilloscope probe.
[Electronic Circuits]
Twospoons
May 18, 2024, 11:30:11 PM
post Re: Pulse Power High Current Discharges from 3 Phase PFC Capacitors
[Capacitor Banks]
MRMILSTAR
May 18, 2024, 10:10:56 PM
post Want to build HV HF oscilloscope probe.
[Electronic Circuits]
Domo
May 18, 2024, 09:46:17 PM
post Re: Pulse Power High Current Discharges from 3 Phase PFC Capacitors
[Capacitor Banks]
davekni
May 18, 2024, 08:05:36 PM
post Re: Help an EE student
[General Chat]
Twospoons
May 18, 2024, 05:59:21 AM
post Re: What capacitor configuration to explode foil?
[Capacitor Banks]
MRMILSTAR
May 18, 2024, 05:44:41 AM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
May 18, 2024, 01:55:42 AM
post Re: What capacitor configuration to explode foil?
[Capacitor Banks]
klugesmith
May 17, 2024, 11:49:33 PM
post Re: Pulse Power High Current Discharges from 3 Phase PFC Capacitors
[Capacitor Banks]
MRMILSTAR
May 17, 2024, 10:18:46 PM
post Pulse Power High Current Discharges from 3 Phase PFC Capacitors
[Capacitor Banks]
Mads Barnkob
May 17, 2024, 07:24:22 PM
post Re: What capacitor configuration to explode foil?
[Capacitor Banks]
Mads Barnkob
May 17, 2024, 07:14:35 PM
post Re: Help an EE student
[General Chat]
Mads Barnkob
May 17, 2024, 08:35:38 AM
post Re: Help an EE student
[General Chat]
MRMILSTAR
May 17, 2024, 05:34:10 AM
post Re: colored 50 Ohm coax
[General Chat]
Da_Stier
May 16, 2024, 10:53:53 PM
post Re: Help an EE student
[General Chat]
Michelle_
May 16, 2024, 10:37:50 PM
post Re: Help an EE student
[General Chat]
davekni
May 16, 2024, 10:29:30 PM
post Re: Help an EE student
[General Chat]
klugesmith
May 16, 2024, 08:26:41 PM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
davekni
May 16, 2024, 06:54:05 PM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
NyaaX_X
May 16, 2024, 05:04:41 PM
post Re: Tesla Synth Player for Syntherrupter
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
AntoineRcbs
May 16, 2024, 12:13:47 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
Domo
May 16, 2024, 06:58:12 AM
post Re: New EE student asks about Cutting-Edge fields
[General Chat]
davekni
May 16, 2024, 06:47:09 AM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
NyaaX_X
May 16, 2024, 06:00:49 AM
post Re: New EE student asks about Cutting-Edge fields
[General Chat]
Twospoons
May 16, 2024, 05:45:08 AM
post Re: New EE student asks about Cutting-Edge fields
[General Chat]
davekni
May 16, 2024, 05:03:41 AM
post Re: DRSSTC grounding issues
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
May 16, 2024, 04:58:40 AM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
davekni
May 16, 2024, 04:36:40 AM
post Re: colored 50 Ohm coax
[General Chat]
klugesmith
May 16, 2024, 12:28:27 AM
post Re: Watercooling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
acobaugh
May 15, 2024, 11:13:48 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
klugesmith
May 15, 2024, 10:58:05 PM
post colored 50 Ohm coax
[General Chat]
Da_Stier
May 15, 2024, 08:31:48 PM
post Re: DRSSTC grounding issues
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
May 15, 2024, 07:56:38 PM
post Re: DRSSTC grounding issues
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
May 15, 2024, 06:29:59 PM
post Re: Watercooling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Felix B.
May 15, 2024, 04:04:14 PM
post Re: Schmitt trigger schematic question
[Electronic Circuits]
Michelle_
May 15, 2024, 03:32:57 PM
post DRSSTC grounding issues
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Felix B.
May 15, 2024, 03:07:39 PM
post New EE student asks about Cutting-Edge fields
[General Chat]
samsonwilliams
May 15, 2024, 05:50:59 AM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
Domo
May 15, 2024, 05:38:14 AM
post Re: Schmitt trigger schematic question
[Electronic Circuits]
Benjamin Lockhart
May 15, 2024, 04:58:02 AM
post Re: Big Coil Build Log
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
May 15, 2024, 04:34:49 AM
post Re: Watercooling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
May 15, 2024, 04:30:18 AM
post Re: Watercooling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
May 15, 2024, 04:00:55 AM
post Re: Watercooling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
May 15, 2024, 03:21:51 AM
post Re: Schmitt trigger schematic question
[Electronic Circuits]
Michelle_
May 14, 2024, 11:12:22 PM
post Re: Schmitt trigger schematic question
[Electronic Circuits]
Benjamin Lockhart
May 14, 2024, 11:00:00 PM
post Schmitt trigger schematic question
[Electronic Circuits]
Michelle_
May 14, 2024, 09:45:38 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
klugesmith
May 14, 2024, 09:02:28 PM
post Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
Michelle_
May 14, 2024, 05:55:24 AM
post Re: Weird AC/DC mini SSTC build review
[Solid State Tesla Coils (SSTC)]
Michelle_
May 14, 2024, 05:44:12 AM
post Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
MRMILSTAR
May 14, 2024, 05:11:54 AM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
alan sailer
May 13, 2024, 11:44:56 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
Domo
May 13, 2024, 10:28:34 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
alan sailer
May 13, 2024, 10:20:19 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
Domo
May 13, 2024, 09:27:58 PM
post Re: Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
alan sailer
May 13, 2024, 09:06:59 PM
post Help with primary voltages of unknown transformer
[Transformer (Ferrite Core)]
Domo
May 13, 2024, 08:43:49 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
May 13, 2024, 07:25:29 PM
post Re: Plasma Torid - Class E Self Resonant Dual/Stereo - Plasma Torid Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
OmGigaTron
May 13, 2024, 06:50:59 PM
post Re: Weird AC/DC mini SSTC build review
[Solid State Tesla Coils (SSTC)]
Michelle_
May 13, 2024, 03:47:08 PM
post Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
Michelle_
May 13, 2024, 03:42:58 PM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
NyaaX_X
May 13, 2024, 07:09:16 AM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
davekni
May 13, 2024, 05:02:46 AM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
NyaaX_X
May 13, 2024, 02:25:25 AM
post Re: Plasma Torid - Class E Self Resonant Dual/Stereo - Plasma Torid Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
May 13, 2024, 01:39:11 AM
post Re: Plasma Toroid
[Solid State Tesla Coils (SSTC)]
alan sailer
May 13, 2024, 01:33:21 AM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
davekni
May 12, 2024, 10:56:53 PM
post Re: Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
NyaaX_X
May 12, 2024, 05:10:40 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
Michelle_
May 12, 2024, 04:24:44 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
alan sailer
May 12, 2024, 04:10:54 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
Michelle_
May 12, 2024, 04:04:11 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
hal7rr
May 12, 2024, 03:56:57 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
Michelle_
May 12, 2024, 03:46:45 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
hal7rr
May 12, 2024, 02:59:16 PM
post Re: Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
Michelle_
May 12, 2024, 02:51:27 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
Michelle_
May 12, 2024, 02:49:42 PM
post Re: Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
ZakW
May 12, 2024, 08:34:39 AM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
ZakW
May 12, 2024, 08:30:29 AM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
Michelle_
May 12, 2024, 02:35:17 AM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
alan sailer
May 12, 2024, 02:07:32 AM
post Re: Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
Michelle_
May 11, 2024, 09:55:59 PM
post Re: Help with LabCoatz's Staccato QCW DRSSTC
[Beginners]
NyaaX_X
May 11, 2024, 06:16:22 PM
post Help with LabCoatz's Staccato QCW DRSSTC Tesla Coil
[Beginners]
hal7rr
May 11, 2024, 05:24:34 PM
post Re: Type 77 Metglas Laced Ferrite Core
[General Chat]
NyaaX_X
May 11, 2024, 10:39:24 AM
post Re: Type 77 Metglas Laced Ferrite Core
[General Chat]
Mads Barnkob
May 11, 2024, 07:02:20 AM
post Re: Aluminum electrolytic capacitor ripple current issue
[Beginners]
NyaaX_X
May 11, 2024, 06:40:50 AM
post Type 77 Metglas Laced Ferrite Core
[General Chat]
paulp1776
May 11, 2024, 06:23:59 AM
post Re: Weird AC/DC mini SSTC build review
[Solid State Tesla Coils (SSTC)]
Michelle_
May 11, 2024, 05:27:22 AM
post Re: Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
alan sailer
May 11, 2024, 01:37:37 AM
post Re: designing and building electron gun help!
[General Chat]
Twospoons
May 11, 2024, 12:10:44 AM
post designing and building electron gun help!
[General Chat]
Luca c.
May 10, 2024, 09:38:05 PM
post Re: Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
Michelle_
May 10, 2024, 09:24:21 PM
post Re: Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
alan sailer
May 10, 2024, 08:43:11 PM
post Quick question about steve ward mini SST5 resonant frequency
[Solid State Tesla Coils (SSTC)]
Michelle_
May 10, 2024, 08:33:47 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 
SimplePortal 2.3.6 © 2008-2014, SimplePortal