Recent Posts

Pages: [1] 2 3 ... 10
1
I have a question for the phase lead, I adjust the phase lead so that there is as little peak as possible but it works on both sides, let me explain, I can either adjust the phase on the left compared to the primary current or right compered to the primary current (on the scop).

So adjust the phase before the primary current, this corresponds to the igbt turn on a little before the primary feedback, and adjust the phase after the primary current, this corresponds to the igbt turn on a little after the primary feedback ?

I don't know if it translates like that but, I have either spikes that appear from rising edges or from falling edges, here is a diagram that illustrates what i mean:

it's not exactly like that in reality, it's just to illustrate what I think I understand




I don't know if I have explained well and if I have the right approach, if you can explain it to me better it may be good, but my question is (if that's what i think i understand) , what is better between the  two solutions ?
2
I added two more lamps in parallel, making a total of 4.
The result is already beyond what I could have expected!



I used a FGA60N65SMD in place of the IRFP460.
With that inductance as a ballast I was able to use the adjustable voltage regulator and get swords like sparks.


I was also able to connect the circuit to the mains voltage without ballasts and use the interrupter. However, the IGBT burned out when I tried to go to the limit of the adjustable voltage regulator (that was possible using the 4 lamps as ballast).
The last spark.




Some changes I will make:
Add a new toroid.
Increase the primary coil from 3 to 4 turns.
Perhaps further increase the capacitance of C between Collector and Emitter*.
I will also redo the entire circuit in a smaller package to reduce unwanted inductance.

Questions:
The first one is related to the capacitance between Collector and Emitter.

Here is the data related to my primary and secondary set.



I don't know if I'm doing the calculations correctly.
My secondary's frequency is around 649kHz and the primary's inductance is around 1,387 microhenry. I believe that the capacitance value to be considered is in relation to the capacitor between Collector and Emitter, right?
So, using a higher value for C would be bringing the primary impedance down, in this case, when using 68nF the impedance would be close to 2ohms, which I believe is bad for the IGBT, right?
Is there any way to calculate the primary impedance "ideal" range in relation to the IGBT/MOSFET used, or is it just from experimentation?

Second question.
I don't intend to use a bunch of light bulbs in my circuit. So I'm looking for an inductor to replace the bulbs.
So I performed the measurement as suggested to have a reference of an inductor that would give me an approximate result.

Quote
I'm using two 100w lamps in parallel as a ballast, how do I calculate the value of an equivalent inductor?
No exact answer.  Incandescent lamp resistance changes about 15:1 between cold and hot (full voltage to lamp).  Exact resistance for your use is unknown, and changing some even during your half-cycles of enable.  First order:  Start with nominal lamp resistance at full power.  Calculate inductance that has same impedance as lamp at your line frequency (50 or 60Hz).  Use that inductance.


And from the Inductor Impedance formula (XL= 2πfL) from this post:
https://highvoltageforum.net/index.php?topic=1739.0
I got the following result:

Current of the lamps in AC and DC

4 lamps in AC - 3.2A
4 lamps in DC (Rectified with 1 diode 10A10) - 1.7A

Z = U/I
Z= 120V / 3.2A (Current of 4 lamps in parallel)
Z= 37.5 Ohms

Inductor Impedance
Zl = 2*PI*f*L

L = Zl/(2*PI*f)
L = 37.5 Ohms / (2*3.14*60Hz)
L = 37.5 / 376.8
L = 0.09952229
L = 99.5 millihenry
or
L = 185 millihenry, since the current of the 4 lamps in DC (After a single 10A10 diode) is close to 1.6A.

Are the calculations correct?

Third question:
This was the waveform I was able to measure between Collector and Emitter. I increased the value of C, however I didn't notice a difference in the format or in the maximum voltage value. What is this ringing voltage at the end of the wave?
Is this elevation at the beginning the ramp that allows sword like output?
3
Spark Gap Tesla Coils (SGTC) / Re: Is this a pulse cap
« Last post by 55#sofcopper on Today at 04:39:00 PM »
Here is a better picture of the label. I can't find a datasheet on it. Any help would be appreciated. I need to make a move but if it's no good for my coil I don't want to spend the money. Right now I have a mmc of 942C20s47K-F at 32nf but they have been in use on several coils and they are really starting to show their age. And it's been a rough life they have had.
4
This is with my own algorithm to handle pulse overlap and short gaps, tailored for my coil behavior.
I'd be very interested in hearing more about your approach and the tweaks you've made! Though a separate thread might be more suitable(?)

Wouldn't expect to find much today, as I can't think of any practical use beyond DRSSTC interrupting.  However, I recall Bell Labs doing some experiments in the 1960s or early 1970s on digitizing audio with 1 bit.  Not sure if that work could be found on the internet today.  I haven't tried searching.
Actually not that irrelevant. Especially the (most important) intermediate step of isolating individual instruments / voices from one recording is still a desirable feature for modifying live recordings afterwards. Certain DAWs do offer such features but that's not useful for the vast majority of our community. I also found one paper who apparently attacked the problem successfully with AI; but they only shared a compiled library with little documentation if I remember correctly.


Kind regards,
Max
5
Max:  Great explanation!  Thank you for posting it.

Quote
Let's say you can go up to 32% total duty cycle (which is rather high for a DRSSTC; most can go up to ~20%). With 16 notes each note has on average a duty cycle of only 2% - not much!
Yes, MIDI music playing depends on DRSSTC coil properties as well as the algorithm.  My DRSSTC is rather low impedance (both primary and secondary).  Reaches my available line power limit of 10kW at 5-6% duty cycle.  Arc length (and sound volume) aren't linear with pulse width.  I'm fairly certain that higher impedance coils are much better for MIDI sound, handling longer on-times and higher duty cycle .  My coil sounds too distorted if playing more than 3 or 4 notes at a time.  (This is with my own algorithm to handle pulse overlap and short gaps, tailored for my coil behavior.  Of course, there may be better algorithms than my creation.)

Quote
I've searched a bit (really not too much) for research papers - or basically any open knowledge - on the topic, too, but so far without success.
Wouldn't expect to find much today, as I can't think of any practical use beyond DRSSTC interrupting.  However, I recall Bell Labs doing some experiments in the 1960s or early 1970s on digitizing audio with 1 bit.  Not sure if that work could be found on the internet today.  I haven't tried searching.
6
Hi dru,


Polyphony for interrupters / DRSSTC controllers used to be a hard problem but many more recent interrupter projects have shown that it's basically solved.
To take the example of my own Syntherrupter, here's one recording of what it can do. It's a direct capture interrupter signal that it generated in real time and which could be fed straight into a DRSSTC driver: https://soundcloud.com/user-754038701/pirates-of-the-carribean-jarrod-radnich-syntherrupter-v420-beta4

The problem is not too hard to solve in theory but in reality - especially for tesla coils - there are quite a few pitfalls. Here's a hopefully logical sequence from simple to advanced on how to do polyphony.
  • The most straightforward form of polyphony is to have one tesla coil (incl. interrupter) for each note you want to play. Feed each interrupter with a different note and you ears will hear both of them together. Or, to be more precise, you'd hear the sum of all the pulses from each coil.
  • Next logical step: add those pulses together before sending them to the tesla coil(s). Or'ing together the digital interrupter signals leads to the exact same result, with the advantage that it can be fed into a single tesla coil. This works very well for low numbers of simultaneous notes and is the technique used by many "established" interrupters (loneoceans and one teslas 2-voice interrupter, uzzor2k's 2-4 voice interrupter, probably others). ***
  • The issue is that these still require one hardware timer for each note, which is why they're often limited to 2 (since the Arduino microcontroller they use only offers 2 timers). Also, or'ing isn't actually perfect. Ontimes can overlap, resulting in longer-than-desired ontimes. Maybe even worse: there can be a very small gap between two ontimes that would cause the common UD1.x and UD2.x drivers to hard switch once.
  • These issues can be solved by moving from hardware-or'ing to doing it in software. Here you have full control. Apply limits, remove undesired conditions, ... Of course, software "vs" hardware is not black and white and all the interrupters linked above use a different mix of various soft- and hardware features. Software based polyphony comes with its own pitfalls; it took me well over a year till I had "solved" the issue (I consider >100 notes on a 120MHz microcontroller as "solved").

*** Or'ing them together only works because the ontimes are so short, like microseconds ontime with milliseconds offtimes inbetween. If you had a 50/50 square wave, or'ing 2 or more signals together would just lead to an almost steady state on signal with a few short off pulses here and there. This is also the reason why more than ~16 notes don't make sense for this sort of application. Let's say you can go up to 32% total duty cycle (which is rather high for a DRSSTC; most can go up to ~20%). With 16 notes each note has on average a duty cycle of only 2% - not much!

----

All of this obviously concerns synthesizing music, a.k.a. playing MIDI files. If you want to play "normal" analog music on your DRSSTC, stuff gets much more difficult; this problem has certainly not been "solved" yet. Existing approaches basically use a zero cross detector (comparator) on the audio signal to trigger interrupter pulses. This works for rather basic audio signals but don't expect it to generate something useful out of a normal song from youtube or whatever.
FFT could in theory work but it's pretty hard to do. First of all, there's usually much more in a song than just <16 clean notes. There are drums and other effects and instruments (as well as voices) are miles away from being clean sine waves (otherwise you wouldn't be able to distinguish instruments playing the same note). There are a lot of harmonics that not only vary from instrument to instrument but also per instrument over time. Our ears can make sense of this mess, but to an FFT it's just that: a mess. How do you distinguish strong harmonics of one instrument from actual notes with the same frequency of another, less loud instrument?
What you're basically asking is to convert an analog audio file to a MIDI-like digital format, with specific notes and - best case - sorted by instrument. Such analog-to-midi tools do exist, though they usually cost quite a bit and/or are far from being perfect. I've searched a bit (really not too much) for research papers - or basically any open knowledge - on the topic, too, but so far without success.


Kind regards,
Max
7
Light, Lasers and Optics / Re: RF mosfets and laser generation
« Last post by dru on October 03, 2022, 11:29:26 PM »
Hi dru,

you wouldn't use them to directly generate laser light. You would build an RF source with high CW power output (normally in the 27MHz ISM band).
This generator is then used to ionize some gas to generate a laser beam.
I think it is called something along the lines of "RF doped laser" or "RF doped plasma".

I'm not really an expert in any way in this field, I only reused some of the RF equipment from it.



Greetings,
Michael
Hi Michael, thanks for the response! That makes sense, I had a feeling it had something to do with gas discharge lasers. I remember when I was researching helium-neon lasers that the power supply was usually switching at much lower frequencies, around 15khz, so that's why I was confused. I did some digging and I found in some he-ne lasers used for research they excite the gas with rf generators, so I'm guessing that's the type of application of this mosfet.
8
Transformer (Ferrite Core) / Re: are these small guys flybacks?
« Last post by Alberto on October 03, 2022, 10:43:21 PM »
Ahh ok ok. Thank you
9
Spark Gap Tesla Coils (SGTC) / Re: Is this a pulse cap
« Last post by MRMILSTAR on October 03, 2022, 10:22:59 PM »
The more correct terminology is "energy discharge capacitor". I can't see what that specification label says. Its difficult to determine the internal construction just from external appearance. You need to see specs like maximum current, ESL, maximum PPS (pulses per second), lifetime shots, etc. Maxwell and and few others cite such specs on their energy discharge capacitors. Most energy discharge capacitors are only rated for 1 PPS or a little higher thus they would be unsuitable for SGTC duty. You need one rated for hundreds of PPS.

Even if this is an energy discharge capacitor, a 30 KV rating isn't high enough. Your 12 KV RMS transformer puts out a peak voltage of 17 KV. I would use a factor of at least 2.5 for the capacitor voltage rating if you want any measure of reliability. That would indicate a required voltage rating of about 40 KV.
10
Spark Gap Tesla Coils (SGTC) / Re: Is this a pulse cap
« Last post by klugesmith on October 03, 2022, 08:18:40 PM »
Let's wait for experienced coilers to reply.

I would guess that "pulse cap" is not a special requirement for coils.
Pulse caps are specified for infrequent discharges (not thousands per second), with details like ESL and peak current (often in kiloamperes) for some number of shots.
For Tesla coil use, I guess what matters is tolerable RF current (for billions of oscillations), dielectric loss, etc.
Pages: [1] 2 3 ... 10

* Recent Topics and Posts

post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
mthome4
Today at 10:28:54 PM
post Re: Driverless Single Mosfet Relay interrupted SSTC? - [All kinds of problems]
[Solid State Tesla Coils (SSTC)]
TiagoBS
Today at 05:32:02 PM
post Re: Is this a pulse cap
[Spark Gap Tesla Coils (SGTC)]
55#sofcopper
Today at 04:39:00 PM
post Re: Audio modulation questions, chords
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Max
Today at 10:28:42 AM
post Re: Audio modulation questions, chords
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
Today at 04:49:55 AM
post Re: Audio modulation questions, chords
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Max
Today at 12:32:58 AM
post Re: RF mosfets and laser generation
[Light, Lasers and Optics]
dru
October 03, 2022, 11:29:26 PM
post Re: are these small guys flybacks?
[Transformer (Ferrite Core)]
Alberto
October 03, 2022, 10:43:21 PM
post Re: Is this a pulse cap
[Spark Gap Tesla Coils (SGTC)]
MRMILSTAR
October 03, 2022, 10:22:59 PM
post Re: Is this a pulse cap
[Spark Gap Tesla Coils (SGTC)]
klugesmith
October 03, 2022, 08:18:40 PM
post Is this a pulse cap
[Spark Gap Tesla Coils (SGTC)]
55#sofcopper
October 03, 2022, 07:36:49 PM
post Re: Getting last joules out of batteries
[Laboratories, Equipment and Tools]
rikkitikkitavi
October 03, 2022, 05:20:17 PM
post Re: RF mosfets and laser generation
[Light, Lasers and Optics]
Da_Stier
October 03, 2022, 10:26:07 AM
post RF mosfets and laser generation
[Light, Lasers and Optics]
dru
October 03, 2022, 03:31:12 AM
post Re: Getting last joules out of batteries
[Laboratories, Equipment and Tools]
klugesmith
October 03, 2022, 01:57:50 AM
post Re: Getting last joules out of batteries
[Laboratories, Equipment and Tools]
davekni
October 03, 2022, 01:45:48 AM
post Re: Audio modulation questions, chords
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dru
October 03, 2022, 12:17:07 AM
post Audio modulation questions, chords
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dru
October 03, 2022, 12:14:34 AM
post Re: are these small guys flybacks?
[Transformer (Ferrite Core)]
Mads Barnkob
October 02, 2022, 08:10:51 PM
post Re: are these small guys flybacks?
[Transformer (Ferrite Core)]
Alberto
October 02, 2022, 05:47:51 PM
post Re: Getting last joules out of batteries
[Laboratories, Equipment and Tools]
rikkitikkitavi
October 02, 2022, 05:31:05 PM
post Re: Radiometer Copenhagen OSG 42b Oscilloscope Repair, From The 1950'ish
[Laboratories, Equipment and Tools]
rikkitikkitavi
October 02, 2022, 05:27:23 PM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
mthome4
October 02, 2022, 02:24:19 PM
post Re: are these small guys flybacks?
[Transformer (Ferrite Core)]
Mads Barnkob
October 02, 2022, 01:11:56 PM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
October 02, 2022, 04:48:00 AM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
mthome4
October 02, 2022, 12:46:19 AM
post are these small guys flybacks?
[Transformer (Ferrite Core)]
Alberto
October 01, 2022, 10:13:29 PM
post My audio modulated sstc circuit, an easy one for beginners
[Solid State Tesla Coils (SSTC)]
dru
September 30, 2022, 08:05:55 PM
post Re: [WTS] large selection of IGBT bricks, large electrolytic capacitors
[Sell / Buy / Trade]
dbach
September 30, 2022, 04:17:35 PM
post Re: Driverless Single Mosfet Relay interrupted SSTC? - [All kinds of problems]
[Solid State Tesla Coils (SSTC)]
davekni
September 30, 2022, 05:01:14 AM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 30, 2022, 04:46:59 AM
post Re: Driverless Single Mosfet Relay interrupted SSTC? - [All kinds of problems]
[Solid State Tesla Coils (SSTC)]
TiagoBS
September 29, 2022, 10:23:27 PM
post [WTS] (EU) electrolytic caps 4700uF + film caps 30uF
[Sell / Buy / Trade]
costas_p
September 29, 2022, 10:13:52 PM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
JCF
September 29, 2022, 05:36:58 PM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Anders Mikkelsen
September 29, 2022, 12:05:51 PM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 29, 2022, 05:18:23 AM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
September 28, 2022, 08:28:16 PM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
JCF
September 28, 2022, 06:05:46 PM
post Re: controlling the negative gate bias voltage of the Gate drive transformer
[Dual Resonant Solid State Tesla coils (DRSSTC)]
prabhatkumar
September 28, 2022, 05:16:13 PM
post Re: DC charging solution
[Spark Gap Tesla Coils (SGTC)]
davekni
September 28, 2022, 05:43:34 AM
post Re: Recommended development boards for QCWDRSSTC
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
davekni
September 28, 2022, 05:20:55 AM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 28, 2022, 05:15:19 AM
post Re: Recommended development boards for QCWDRSSTC
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
dru
September 27, 2022, 07:11:42 PM
post Re: Recommended development boards for QCWDRSSTC
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
dru
September 27, 2022, 07:07:00 PM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
JCF
September 27, 2022, 05:08:45 PM
post DC charging solution
[Spark Gap Tesla Coils (SGTC)]
Conrad73
September 27, 2022, 04:57:38 PM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 27, 2022, 03:12:49 AM
post Re: Ud failure
[Dual Resonant Solid State Tesla coils (DRSSTC)]
klugesmith
September 27, 2022, 02:23:44 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 26, 2022, 07:55:31 PM
post Re: Help with PLL induction heater driver
[Electronic Circuits]
dbach
September 26, 2022, 04:04:11 PM
post Re: What am I missing?!?!?
[Spark Gap Tesla Coils (SGTC)]
davekni
September 26, 2022, 05:13:23 AM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 26, 2022, 05:10:13 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 26, 2022, 05:03:46 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 26, 2022, 04:33:12 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 26, 2022, 03:01:21 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 26, 2022, 01:30:04 AM
post Re: Help with PLL induction heater driver
[Electronic Circuits]
Anders Mikkelsen
September 25, 2022, 10:57:23 PM
post Re: Ud failure
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 25, 2022, 09:59:53 PM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
mthome4
September 25, 2022, 09:43:24 PM
post Re: Recommended development boards for QCWDRSSTC
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
davekni
September 25, 2022, 07:33:57 PM
post Re: Ud failure
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 25, 2022, 07:06:33 PM
post What am I missing?!?!?
[Spark Gap Tesla Coils (SGTC)]
Conrad73
September 25, 2022, 06:35:43 PM
post Radiometer Copenhagen OSG 42b Oscilloscope Repair, From The 1950'ish
[Laboratories, Equipment and Tools]
Mads Barnkob
September 25, 2022, 03:18:22 PM
post Re: Recommended development boards for QCWDRSSTC
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
Rafft
September 25, 2022, 02:53:30 PM
post Recommended development boards for QCWDRSSTC
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
dru
September 25, 2022, 09:05:37 AM
post Re: Ud failure
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
September 25, 2022, 08:29:09 AM
post Re: Ud failure
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 25, 2022, 05:27:41 AM
post Re: Gauss meter for strong magnetic fields
[Laboratories, Equipment and Tools]
klugesmith
September 25, 2022, 02:12:21 AM
post Ud failure
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
September 25, 2022, 01:50:45 AM
post Re: controlling the negative gate bias voltage of the Gate drive transformer
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 24, 2022, 09:36:58 PM
post Re: Gate drive transformer with negative gate bias voltage
[Dual Resonant Solid State Tesla coils (DRSSTC)]
prabhatkumar
September 24, 2022, 06:56:35 AM
post Re: Gate drive transformer with negative gate bias voltage
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 24, 2022, 06:09:03 AM
post Re: Gauss meter for strong magnetic fields
[Laboratories, Equipment and Tools]
davekni
September 24, 2022, 01:32:08 AM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
mthome4
September 23, 2022, 10:55:21 PM
post Re: Gauss meter for strong magnetic fields
[Laboratories, Equipment and Tools]
AstRii
September 23, 2022, 10:39:13 PM
post controlling the negative gate bias voltage of the Gate drive transformer
[Dual Resonant Solid State Tesla coils (DRSSTC)]
prabhatkumar
September 23, 2022, 05:48:17 PM
post Gauss meter for strong magnetic fields
[Laboratories, Equipment and Tools]
Peregrine
September 23, 2022, 02:01:10 PM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 23, 2022, 03:04:31 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 22, 2022, 04:15:36 PM
post Re: SSTC - PCB design
[Beginners]
Przemekk00
September 22, 2022, 12:39:51 PM
post Re: Possible Leads on Single Photon Camera
[General Chat]
alan sailer
September 22, 2022, 12:05:55 AM
post Re: Possible Leads on Single Photon Camera
[General Chat]
Mads Barnkob
September 21, 2022, 10:32:29 PM
post Possible Leads on Single Photon Camera
[General Chat]
alan sailer
September 21, 2022, 03:57:38 PM
post Re: Driverless Single Mosfet Relay interrupted SSTC? - [All kinds of problems]
[Solid State Tesla Coils (SSTC)]
davekni
September 21, 2022, 05:50:15 AM
post Re: Musical interrupter problems
[Solid State Tesla Coils (SSTC)]
RoamingD
September 20, 2022, 10:29:41 PM
post Re: Musical interrupter problems
[Solid State Tesla Coils (SSTC)]
Mads Barnkob
September 20, 2022, 08:24:30 PM
post Re: Driverless Single Mosfet Relay interrupted SSTC? - [All kinds of problems]
[Solid State Tesla Coils (SSTC)]
TiagoBS
September 20, 2022, 06:23:54 PM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 20, 2022, 05:20:07 AM
post Re: TO247 mounting
[Beginners]
davekni
September 20, 2022, 05:15:35 AM
post Re: MidiStick V2.0: Next gen tesla coil interrupter
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
TMaxElectronics
September 19, 2022, 11:43:47 PM
post Re: TO247 mounting
[Beginners]
Weston
September 19, 2022, 09:58:56 PM
post Re: Some questions about my first drsstc.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
mthome4
September 19, 2022, 09:05:35 PM
post Re: Musical interrupter problems
[Solid State Tesla Coils (SSTC)]
RoamingD
September 19, 2022, 12:58:35 PM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 19, 2022, 12:13:46 AM
post Re: MMC capacitor crash
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 19, 2022, 12:09:22 AM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 18, 2022, 11:38:51 PM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
FonziDaytona
September 18, 2022, 10:41:54 PM
post Re: Musical interrupter problems
[Solid State Tesla Coils (SSTC)]
davekni
September 18, 2022, 10:31:32 PM
post Re: Musical interrupter problems
[Solid State Tesla Coils (SSTC)]
RoamingD
September 18, 2022, 10:09:33 PM
post Re: UD2.7 dual Purpose Use
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
September 18, 2022, 09:58:34 PM

SimplePortal 2.3.6 © 2008-2014, SimplePortal