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Messages - Netzpfuscher

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1
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: January 26, 2024, 05:19:18 PM »
@Mads

It's no problem to change the CT2 shunt to something different. It needs no change in the code. Simply solder whatever you like, then change the "ct2_burden" (Ohms) accordingly. It's better not to rely on the internal clamping diodes of the PSOC, so make the shunt
small enough not to fry the MCU input. (There is a 470 Ohms in series, but better safe than sorry). Then change the "ct2_ratio" to 2000 and you're fine.


@flyingperson23
The UD3 software is not designed to output every current sample. It uses DMA to collect 25 samples from the ADC before interrupting the CPU to calculate everything. I implemented this to decrease interrupt load. The current is sampled with 8 kHz the CPU is interrupted at a rate of 320 Hz so that's the rate you're getting 25 sampled at a time. Is that fast enough? Otherwise you need to decrease the
https://github.com/Netzpfuscher/UD3/blob/892b8c25da2784e880c0c2617d417b14c3421ecd/common/ud3core/config.h#L40

This is the line calculating RMS:
https://github.com/Netzpfuscher/UD3/blob/892b8c25da2784e880c0c2617d417b14c3421ecd/common/ud3core/tasks/tsk_analog.c#L261

2
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: November 24, 2023, 08:57:36 AM »
We have no DAC-Channels free. I can give you a PWM output of the ramp, should be no big change.

3
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: March 17, 2022, 08:32:28 AM »
I thought I had put a RMS filter in the voltage too, but it isn't. So actually you need a capacitor. Only the current signal has a RMS filter. I think I will add RMS to the voltage too.

The DC current sensor needs to be between rectifier and bus capacitor.


Edit:
Added RMS for the voltage. So theoretically no capacitor necessary.

https://github.com/Netzpfuscher/UD3/commit/a4ba5f52c30d6a502a41842188e9969980612b06

4
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: March 16, 2022, 08:10:21 PM »
Looks cool  8)

The ESP32 project is not working anymore. Since then we changed so many things, we needed to include a timecode in the frames and changed the packet sequence number from 8 to 32 bit. But with the Fibernet we simplified the network code. It's as simple a encapsulating the protocol frames into a UDP packet. I think I can port it to the ESP32 in short time, but need to find a bit of time to do it.

5
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: February 17, 2022, 07:18:09 AM »
Quote
  I would like to play music on them both at the same time, but im having a hard time figuring out how to do that.
Teslaterm makes a MIDI RTP server. Here is a Windows client: https://www.tobias-erichsen.de/software/rtpmidi.html
You need to start multiple instances of Teslaterm (I remember you need to copy Teslaterm to a second folder or use a second computer) Then put them all into one MIDI RTP session. With the filter string in the UD3 you can set the channels and frequency you want to play on that coil.

Quote
I've tried to make some changes to the teslaterm source code but I'm not quite sure how to compile it.
You can execute it directly with electron no need to compile. Sadly our build system in github is broken because of some packages missing.
To start if you have npm:
npm run-script install-electron
npm run-script start-electron

For the headless version (with webserver):
npm run-script install-node
npm run-script start-node

Quote
Is there a way to change the scale of the telemetry readout? I have my maximum current set to 300a, but the graph seems to default to 327a/division.
It's calculated with max measurable current... The values are not in Teslaterm, the UD3 say Teslaterm how to configure every chart and gauge. So needs changes in the UD3... Please show what you mean, I'm not 100% sure.

7
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: November 25, 2021, 07:09:29 AM »
Hello,
Quote
The UD3s are playing the frames by the timecode. To get it over multiple control computers working the master sends his time to all slaves every 500ms. The slaves are calculating a offset (which get smoothed to get rid of latency jitter) to their time and are sending the corrected time to their UD3 which is syncing to this time (the master time). I need to measure the timing differences but it sounds good.

I had some confusion over this, is there one master computer using the others as slaves, and then each slave is paired with a ud3? Or is one computer with a master ud3 using the others as salves (with the other computers being used as aux USB ports?)

Thanks so much! The ud3 looks amazing

Problem is, that I hadn't time to implement it in the new Teslaterm version.

-One UD3 is connected to one instance of Teslaterm it syncs its time with a PLL to the computer time
-One Master Teslaterm syncs the time to all slave Teslaterms
-The Master Teslaterm plays the SID and taggs the frames with time and transmit it to slaves.

Quote
Which commit is last safe for using QCW synth? This one? https://github.com/Netzpfuscher/UD3/commit/cd4d18a4d5818ee01e0f0742d89642772fda708a

Seems so. All before VMS I think.


8
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: November 16, 2021, 07:09:35 AM »
Camels_Run.sid - https://i.imgur.com/tz1zx1n.mp4

Here im trying the QCW function with a 15ms burst - https://i.imgur.com/LzcDnUn.mp4

Cool, good progress

This is the coil accidently going CW when I issued  "set synth 3" - https://i.imgur.com/v4iRskI.mp4

Oh, yes there was something. Check the newest commit (I also switched VMS_Dev to master) I disabled QCW synth for now. With the VMS it was intended to make the QCW MIDI synth also block based configurable but I had not time to do it yet. So I disabled the QCW synth for safety reasons now.

I have a few small things im still working on, I want to include an ESP8266 or 32 on the board, i bought some modules but cant figure out how to interface with them.  I should choose MIN over UDP, correct? And i shouldn't need to modify any code?

Not right... The ESP32 project is obsolete and not working anymore. https://github.com/TMaxElectronics/UD3-Fibernet-Firmware <--Essentially we need to port this or port it in parts. MIN UDP is very simple, you get a UDP packet from teslaterm and you can put it 1:1 to the UART on the ESP. For receiving you need to implement parts of the MIN UART receive function to detect frame start and end (you can take a look at the fibernet code) und put a MIN frame 1:1 in a UDP packet and send it to Teslaterm.

I cant get the pulse width longer than 400us in TR mode. I've tried editing the range in psoc creator, and some of the GUI files for TeslaTerm, nothing seems to work and i don't know where to look.  Another suggestion i have is a "one shot" button for TR and QCW mode.

The 400us is only a limit in Teslaterm. The UD3 allows 10000us have you set "max_tr_pw" also to a higher value? For the Teslaterm slider I need to take a look in the code. As workaround you can set a higher pw directly in the console with "set pw 1000" or so

And finally, for tuning, I run "tune_Prim" and i get a graph. Say my secondary resonance is 55khz, I should try to get my primary resonance in the graph at ~50khz? Then have the auto tune start at 56khz?
If you run tune prim you get the primary resonance frequency. For best results you should remove the secondary and make a run at low voltage (like 60V or so) to change the frequency you only can change the tap on the primary. There is no way to change the frequency in software.


9
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: October 22, 2021, 07:03:26 AM »
Anyway very long story short I got the driver working! I am unsure if i am using it right though, there is not much documentation for the interface.

Cool  8)

There was also a lot of timing warnings when i built and programmed the board. Do i need an external crystal for this board? I also moved the gate drive pins around to fit the dev board layout. And is the correct order to build the "UARTldr_QFN", then program the board, then build the "UD3_QFN" and program the board?


Yes, all correct. You don't need a crystal.

As you can see in the photo im using a USB to TTL converter to connect to my laptop. I see the default baud rate set to 460800 but it looks like my computers USB can output a max of 128000. Do I change it in the PSoC creator to match my USB port?

You can change the baudrate with Teslaterm in settings. But 460800 is standard for all UD3 also for the Fibernet, its fast enough. You get no benefit of turning it up.

I connect to Teslaterm in serial(simple) with 460800 baud, then change it to serial(MIN). I connect my coil with a low voltage on the bus and type in "Tune Prim" to run the tuning and get the suggested resonant frequency. I then change the start frequency to that frequency with 3 start cycles.  I turn "TR mode on" and adjust the on time and frequency which works fine. But when I try to play MIDI files it sounds bad and a lot of files that work on other members coils don't sound right. 

Have you tested with a coil or a speaker on TP6? A speaker will not sound right on current modulation for debugging with a speaker it needs to be set to ontime modulation ("vol_mod"). For the coil, there is another parameter (you also can use ontime modulation on a coil) Whats the maximum current of your coil? There is a min current parameter, it's used for volume modulation "min_tr_current" maybe set it to a lower value. "set min_tr_current 50" It means that a playing note with low volume still produces a output of 50A (for linearization).

As im typing this i realize that it might be the UVLO triggering, im powering it at 17v because the on board regulators get way too hot at 24v im afraid they will die.  Could this be the problem, or is it a serial issue, or a problem with the midi files?  But i see in PSoC creator the UVLO doesn't have anything there so maybe thats not it.


You cannot set the UVLO in software it is simply a digital pin, you need to modify the external voltage divider. You can check if it was UVLO, with "alarms get" if there is a UVLO event in the alarm monitor or display the signal state with "signals". I bet it is the problem. No one has a problem with MIDI.

Also what's the difference between UD3 node and Teslaterm? What is UD3 node for? only if you want to connect over ethernet? Do i need it to play SID music files? When i try running UD3-node.exe from https://github.com/malte0811/Teslaterm/releases/tag/v0.0.2  i get this error message.

 I also see this version of UD3 node from https://github.com/Netzpfuscher/UD3-node but i don't know what to do with those files, so i will stick with using Teslaterm on malte0811's github.

If you use a new version of Teslaterm and Node... There is no difference in function. The node version is simply for a headless device like a Raspberry in the coil. The UI can then accessed with Chrome from another computer.

Please use only this: https://github.com/Netzpfuscher/Teslaterm/tree/new_versions
Binarys: https://github.com/Netzpfuscher/Teslaterm/actions/runs/1221655930

Other versions are not really supported anymore.

Sorry for all the questions and for rambling on, I want to get everything working and make sure im doing it right so i can write step by step instructions instructions for the wiki how to get it to work.

That would be great :)

Oh and please give me your complete changed pinout, then I put it into github. That makes updates easier. Now I put together the VMS branch, it is a super big improvement over the old MIDI synthesizer. But the master branch is also working. But it doesn't support drums and other instruments in MIDI mode.

If you want to try (I added the pinout of the screenshot):
https://github.com/Netzpfuscher/UD3/tree/vms_dev

The instrument file (you need actual Teslaterm: https://github.com/Netzpfuscher/Teslaterm/actions/runs/1221655930) just pull the file into the scope on teslaterm to flash it into the UD3:
https://github.com/TMaxElectronics/MidiStick_Firmware/releases/download/V2.0/VMS.example.mcf

If you update the UD3 over psoc creator the instruments are deleted you need to reflash the mcf file. If you update over bootloader it is preserved.

10
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Idea for QCW DRSSTC
« on: September 24, 2021, 07:26:30 AM »
Copied from the spec sheet:

Phase Shift Bridge Driving
For QCW operation, the UD3 can be commanded to operate as a phase shifted driver, where the phase shift controls the average applied voltage to the tank circuit and can be modulated.  The phase shifted output is sent alternately to each GDT so that each set of transistors will spend half their cycles as ZCS and half their cycles as hard-switched phase shifted drive.  The GDT waveform required to do this puts up to 2X the V-s (volt-second) stress on the GDT, therefore, GDTs used with phase shift drive should be tested down to ½ of the intended operating frequency to verify they do not saturate. 

QCW Test Mode
At this point, the GDT outputs can be scoped and you should see an in-phase GDT drive signal with a frequency as defined in config.start_freq.
Phase shift doesn’t happen until the feedback CT (which is CT1; CT2 is for the hall effect sensor and may be omitted) receives config.start_cycles number of cycles, after which it will begin phase shift drive from ~20deg or so. Note that 0 = no phase shift and 255 = 180deg shift. To test this, a test sine wave can be fed into the CT input to simulate this.



Above shows the GDT outputs (cyan and yellow) and purple (Ch1 - Ch2). A transition point happens where phase shift begins after the desired number of cycles. The drive will then also lock onto the feedback frequency. A good way to look at this intuitively to see the ‘duty cycle’ as the area of the purple signal. In the first few cycles which are normal drive, phase shift is 0 and duty cycle is 100%. Then phase shift begins and the area drops significantly, beginning around 20 degrees or so.





By the way, we are collecting ideas for a UD4. The psoc in the UD3 is nearly full and we can't implement more features in hardware. I think we make a design with a Smart Fusion 2 SOC complete digital (sample everything with a high speed ADC) The Smart Fusion has a Gbit MAC which is great for cheap fiber ethernet and with DDR3 interface we have enough memory for all fancy shit ^^

https://www.microsemi.com/product-directory/soc-fpgas/1692-smartfusion2


11
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Idea for QCW DRSSTC
« on: September 23, 2021, 08:49:51 AM »
On the UD3 one half of the bridge switches normally in zero crossing the other half is shifted from 0-180 deg. After each pulse the bridge switches to equalise thermal load. (Steve Ward design)

The ramp is arbitrary. I have a ~150µs interrupt in which I copy new phase shift values from a buffer to the logic. Ramps can be programmed with a few simple parameters, or with drawing functions (line x1 y1 x2 y2, ...)

I also have QCW MIDI and QCW SID support (In the newest synthesizer implementation I tossed the actual MIDI implementation but there is something better ;)) actually it is more a long pulse plus modulation, I simply synthesise a sound waveform and send it to the coil on a note on event, but without a ramp (but add a ramp should be easy)
The new synth is a block based synth from TMaxElectronics Midistick ported to the UD3. It has the nice feature to build a "instrument" on a graphically basis you can connect several blocks like ramps, sines, jumps, random.... if I add the qcw phase angle to the writable values its done. Then you can control phase angle, current and pulse length in realtime (1 ms resolution, I think I need a underlying buffer for faster events).

12
The bootloader in the qfn project is pointing to the UART_LDR project. Compile it first and then the UD3. Or just change the path to the precompiled binary, like you did.

The second error is fixed since yesterday, just pull a fresh version from the git. The problem is, that we all work with the TQFP Version and we sometimes forget to add new files to the qfn project. The warnings are okay.

13
You need a fiber link which is capable of 460800 baud.

To the dev board version. You need to double check the pinout against psoc creator. I bet something has shifted to the profdc version. I don't take care of the pins, some are auto placed during synthesis. For me the dev board version is only for debugging com and OS.

And you need to stick to the schematic of the real thing. Don't let pins unconnected, they can trigger a sysfault.

https://github.com/Netzpfuscher/UD3_PCB
For Altium, but I think we can give you a pdf schematic and production files.

14
Beginners / Re: Mitsubishi CM300DY-24H IGBT
« on: April 26, 2021, 07:51:48 AM »
Why would the SKM200GB12T4 be good for any coil with a max switching frequency of 20khz, the one I want to build will be in the range of 50 to 100 khz. So doing soft switching is one able to go much higher, or best to find better igbt with faster switching. Thanks again, will read again your stuff on igbts. (Mads)

No, the SKM200 goes much higher than 20kHz. The 20kHz from the datasheet is for hardswitching @ 100% dutycycle. I have used them in a 65-70kHz coil with no problems.

If you add up the switching times CM300 (1450ns) vs SKM200 (732ns) you see that the CM300 are twice as slow. The SKM600 are around 885ns and much more powerful.

15
Beginners / Re: Mitsubishi CM300DY-24H IGBT
« on: April 24, 2021, 08:33:42 AM »
The CM300 are a very old generation. The SKM are newer. From a SKM200 you can expect 750A a SKM400 ~ 1000A and a SKM600 (half bridge are very rare, they can't handle 600A cont. because of package limit) around 1400A. SKM600 single switches maybe more because of the better thermals.

But the price goes from cheap to expensive. It depends how long you are willing to wait. eBay I would look for a auction with more than one. For a SKM200 25-30€ is ok. I got mine IGBTs from scrap for 0€ or the most from a HAM flea market where I payed 5€ per module SKM600 and Infineon 300,... A big Box full  ;D

So you see the price is relative wide spread.

16
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: April 03, 2021, 08:04:49 AM »
The 16Mhz shouldn't be an issue, the PLL locks to 64Mhz if you set the XTAL to 16Mhz in Psoc Creator. But then you need to make it every time I change something on this file in the GIT. A much better solution is to just remove the XTAL from the board. The firmware starts on the internal oscillator and try to start the XTAL, which fails and stays on the internal oscillator. The accuracy from the crystal isn't needed. The clock to the PC is synced with a PLL and can compensate for that. With the dev board version of the UD3 there is also no crystal.

The IP problem...
You can logon to the fibernet through the UD3. Just type "debug fn", then you get the CLI in the fibernet. To exit just press CTRL+C, to exit top or iotop in the fibernet just press "q".
"ifconfig" gives you some ip infos or let you set a ip (You loose connection with setting the IP over a IP connection ;) ) If you connect over USB to the UD3 you can see the DHCP messages from the fibernet without the problem of loosing the connection.

The ifconfig settings are not saved yet. I think we can make a config file on the SD card later.



17
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: April 02, 2021, 10:18:24 PM »
With min enabled you cannot use a normal Terminal, you need Teslaterm. It's a binary protocol. If you want to use a normal Terminal you need to switch off min save and restart. Then you should get a CLI with a usb serial cable.

With fibernet... You have a DHCP running? We have a fallback to a static IP but it can take some time.


18
Dual Resonant Solid State Tesla coils (DRSSTC) / Re: Next Gen DRSSTC
« on: April 01, 2021, 09:10:08 AM »
- Baudrate 460800 is correct for Fibernet.
- ivo_uart needs to be set to 0
- RX-TX is swapped in the revision you tested (I forget to change this back, the first fibernet revision had false pinout) I fixed it: 5e215fe77a72e46d5eb83f55406cefff23c0661f
- min_enable needs to be set at 1... Then saved with eeprom save... then restart with reset... The "garbage" are binary min frames. The 1s min reset is correct until a client is connected
- blink of the com light is good
- with min_enable = 1 the "garbage" is a "hello computer I'm a starting UD3" frame ;)
- Teslaterm with a serial cable should connect with "min" and baudrate 460800 and the correct COM port
- USB-CLI is exactly for that reason, if the serial parameters are fucked up to configure the UD3

Quote
* with the firmware located here (https://github.com/Netzpfuscher/UD3/blob/master/common/binary/UARTldr/CY8C5868AXI-LP032.hex), the UD3 would boot, fibernet LED would be red. Right after boot, fibernet LED would go solid green

This is only a bootloader. I think I can compile you a actual complete binary and put it on the git release page today.

Quote
Oh, and I killed my programmer over the weekend, so I need to wait for another devkit to show up
If the bootloader is still on the board it can be recovered. I take a look if the bootloader pinout is correct. The binary is 13 months old, perhaps it is also from the pre fibernet time. But for updating the bootloader you need a programmer.

If you still have problems, I'm shure we can solve that over Zoom or Teams ;)



Edit (new binarys):
https://github.com/Netzpfuscher/UD3/releases/tag/2.1.0

19
The circuit out of the datasheet is to reduce current ripple. With the parallel transistor to the LED you have no fast current changes on the supply. For a 555 interrupter it is not relevant.

20
You cannot use such current transformer with a standard driver. The driver has a input impedance of around 3 Ohm and your current transformer around 12 Ohm. Such transformers are for around 100mA on the secondary. The driver needs about 1A.
Build your own CT from two cores.

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post Re: My completed 14-stage Cockroft-Walton voltage multiplier
[Voltage Multipliers]
Alberto
March 24, 2024, 07:27:24 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
MRMILSTAR
March 24, 2024, 04:25:23 AM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
Alberto
March 23, 2024, 10:47:35 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
MRMILSTAR
March 23, 2024, 09:30:21 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
Alberto
March 23, 2024, 04:34:31 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
MRMILSTAR
March 23, 2024, 03:04:25 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
Alberto
March 23, 2024, 01:38:34 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
MRMILSTAR
March 23, 2024, 04:20:03 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
davekni
March 23, 2024, 12:54:30 AM
post Re: Smoke Screen Machine Protect 950 XP - Teardown of a Smoke Cannon!
[Electronic Circuits]
davekni
March 23, 2024, 12:05:57 AM
post capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
Alberto
March 22, 2024, 11:45:03 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
OmGigaTron
March 22, 2024, 11:30:09 PM
post Smoke Screen Machine Protect 950 XP - Teardown of a Smoke Cannon!
[Electronic Circuits]
Mads Barnkob
March 22, 2024, 10:20:35 PM
post Re: Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
Benbmw
March 22, 2024, 09:21:13 PM
post Re: What actually kills MOSFETs?
[Beginners]
AstRii
March 22, 2024, 03:37:11 PM
post What actually kills MOSFETs?
[Beginners]
FPS
March 22, 2024, 05:09:20 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 22, 2024, 03:57:54 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 22, 2024, 02:59:25 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 21, 2024, 06:31:42 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
rikkitikkitavi
March 21, 2024, 03:08:01 PM
post Re: [WTS] IGBT, Ferrite, Capacitors, Tools, PSU, Industrial components and parts
[Sell / Buy / Trade]
Mads Barnkob
March 21, 2024, 01:37:32 PM
post Re: Difference between these transformers
[Transformer (Ferrite Core)]
Alberto
March 21, 2024, 11:42:07 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 21, 2024, 04:09:14 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 21, 2024, 02:15:31 AM
post My Homemade Structural Analysis X-Ray Machine
[X-ray]
Luca c.
March 21, 2024, 01:35:40 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Saattvik24
March 20, 2024, 10:40:00 PM
post Re: Difference between these transformers
[Transformer (Ferrite Core)]
Mads Barnkob
March 20, 2024, 08:03:41 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Mads Barnkob
March 20, 2024, 07:51:57 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 20, 2024, 10:39:47 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 20, 2024, 04:09:59 AM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 20, 2024, 01:13:23 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Keybored
March 20, 2024, 12:45:16 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
March 20, 2024, 12:30:30 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 19, 2024, 11:12:24 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 19, 2024, 09:47:49 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 19, 2024, 09:44:19 PM
post Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Saattvik24
March 19, 2024, 06:52:09 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
March 19, 2024, 05:02:44 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
Mads Barnkob
March 19, 2024, 05:01:41 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 19, 2024, 04:31:02 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 19, 2024, 03:59:54 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 19, 2024, 06:41:39 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
davekni
March 19, 2024, 04:05:49 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
OmGigaTron
March 18, 2024, 09:08:35 PM
post Re: Can I Trust This Super Cheap Site?
[General Chat]
2020-Man
March 18, 2024, 09:07:35 PM
post Re: Can I Trust This Super Cheap Site?
[General Chat]
Twospoons
March 18, 2024, 08:57:06 PM
post Re: Can I Trust This Super Cheap Site?
[General Chat]
MRMILSTAR
March 18, 2024, 03:51:33 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 18, 2024, 02:59:46 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 18, 2024, 02:33:25 PM
post Can I Trust This Super Cheap Site?
[General Chat]
2020-Man
March 18, 2024, 11:02:12 AM
post Re: Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
Twospoons
March 18, 2024, 02:36:11 AM
post Re: Best forum for vacuum tube amplifiers?
[General Chat]
Mads Barnkob
March 17, 2024, 07:42:55 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Michelle_
March 17, 2024, 04:15:14 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Michelle_
March 17, 2024, 05:05:04 AM
post Re: Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
davekni
March 17, 2024, 04:50:51 AM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Twospoons
March 17, 2024, 04:45:17 AM
post 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Michelle_
March 17, 2024, 04:17:51 AM
post Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
Terry
March 17, 2024, 01:29:32 AM
post Re: DRSSTC Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
March 17, 2024, 12:33:06 AM

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