Thank you for your video and code. It works very well. There are a couple of mistakes on the schematic. The capacitor C1 should be 1000uf instead of 1uf, and you have the 7812 12 volt regulator shorted to ground on the Vin Nano pin. I addressed these before I built the circuit (I've been in electronics since 1974) and it worked first time around. I thought this may help someone else trying to build this project. Thanks again for all the info. Keep up the great works! Regards, Cliff
Oh no, what a mistake. I don't know what I was thinking when I drew the circuit diagram. Thank you a lot for noticing! Hopefully, no one has fried their regulator :) It was actually 1 mF, millifarads. For some reason, CircuitLab converted it to 1 mF, even though I wrote 1000 μF. I also corrected that with separate text in the diagram in the blog post. Should perhaps add a flag to the video, too. Good to hear that you got the circuit working. Apparently, the code worked fine as well? I was considering using an opto-isolator between the output and the triac when designing it. However, I tried without it, and it worked just fine. If you want it to be more safe, you can add the opto-isolator there.
nice!! i had troubles with an SCR staccato using a pentode, again i'm seeing people using this solution but with triodes, my conviction is that the grid 2 of a pentode messes with the SCR trough the tube's cathode and makes it go full 50Hz past some variac power... i used a relay on the primary of the MOT at the end, you have to sync it and it's a bit crude but it works
Thank you for the comment. I haven't worked with pentodes, but they are indeed different from triodes and, as far as I understand, unnecessary in a Tesla coil. Of course, there are good pentodes available and I also have a couple of GU81s, but I haven't done anything with them yet.
Hello, is there an error in the code/sketch right now? If not, you can send a link to the sketch here, otherwise it is not possible to copy it from the assembler
@@GURONTV Do you mean this, on line 25: while (analogRead(pinAC) < 15){}? That's a threshold value for the measured, half-wave rectified alternating current at which the thyristor is triggered. Input A1 on the Arduino.
@@ponttokamera Yes, the 25th line of the sketch has such a coefficient of "15", I just did not understand how it was formed, I thought it was a cubic root (sqrt) of 50 Hz, but it is not so, I assembled stockatto, but on LGT8F328P Chinese arduino logic green and for some reason in my opinion the circuit works a little bit wrong, too the discharges are going fast, I would like to go even slower, thank you
@@GURONTV How fast? The delaytime is sen on line 31: "if ((i >= map(analogRead(potInterval),0,1020,50,0)) && (analogRead(potInterval) > 10)){" Try to change the value "50" and see if it works. You can also try to increase the threshold value "15" to a bigger number. The AD-converter in your board can be slightly different than in Arduino and the value "15" might be too small.
Hello, and thank you for your interest for my project! You're right, there was an error in the code, the blogger had messed it up. I fixed it a couple of days ago, it should be fine now. Have you tested it with the corrected code? The one that is linked directly from the Arduino cloud.
Very nice video and very well done that too with clear explanations. Keep it up.
Thank you for your video and code. It works very well. There are a couple of mistakes on the schematic. The capacitor C1 should be 1000uf instead of 1uf, and you have the 7812 12 volt regulator shorted to ground on the Vin Nano pin. I addressed these before I built the circuit (I've been in electronics since 1974) and it worked first time around. I thought this may help someone else trying to build this project. Thanks again for all the info. Keep up the great works!
Regards,
Cliff
Oh no, what a mistake. I don't know what I was thinking when I drew the circuit diagram. Thank you a lot for noticing! Hopefully, no one has fried their regulator :)
It was actually 1 mF, millifarads. For some reason, CircuitLab converted it to 1 mF, even though I wrote 1000 μF. I also corrected that with separate text in the diagram in the blog post. Should perhaps add a flag to the video, too.
Good to hear that you got the circuit working. Apparently, the code worked fine as well? I was considering using an opto-isolator between the output and the triac when designing it. However, I tried without it, and it worked just fine. If you want it to be more safe, you can add the opto-isolator there.
Yes your code worked perfectly! Thanks again.
Great and informative vid! Have an 833A coil that red-plates the anode fairly quickly. This would solve the problem nicely.
nice!! i had troubles with an SCR staccato using a pentode, again i'm seeing people using this solution but with triodes, my conviction is that the grid 2 of a pentode messes with the SCR trough the tube's cathode and makes it go full 50Hz past some variac power... i used a relay on the primary of the MOT at the end, you have to sync it and it's a bit crude but it works
Thank you for the comment. I haven't worked with pentodes, but they are indeed different from triodes and, as far as I understand, unnecessary in a Tesla coil. Of course, there are good pentodes available and I also have a couple of GU81s, but I haven't done anything with them yet.
Hello, is there an error in the code/sketch right now? If not, you can send a link to the sketch here, otherwise it is not possible to copy it from the assembler
Check the link to the blog post in the video description; the code is there. There shouldn't be any errors.
@@ponttokamera In the sketch, the code has a coefficient of "15", what does it mean?
@@GURONTV Do you mean this, on line 25: while (analogRead(pinAC) < 15){}? That's a threshold value for the measured, half-wave rectified alternating current at which the thyristor is triggered. Input A1 on the Arduino.
@@ponttokamera Yes, the 25th line of the sketch has such a coefficient of "15", I just did not understand how it was formed, I thought it was a cubic root (sqrt) of 50 Hz, but it is not so, I assembled stockatto, but on LGT8F328P Chinese arduino logic green and for some reason in my opinion the circuit works a little bit wrong, too the discharges are going fast, I would like to go even slower, thank you
@@GURONTV How fast? The delaytime is sen on line 31: "if ((i >= map(analogRead(potInterval),0,1020,50,0)) && (analogRead(potInterval) > 10)){" Try to change the value "50" and see if it works.
You can also try to increase the threshold value "15" to a bigger number. The AD-converter in your board can be slightly different than in Arduino and the value "15" might be too small.
Great work. I followed along and built it but the code on your blog is incomplete. Any way you can post the final code. Thanks again.
Hello, and thank you for your interest for my project! You're right, there was an error in the code, the blogger had messed it up. I fixed it a couple of days ago, it should be fine now. Have you tested it with the corrected code? The one that is linked directly from the Arduino cloud.