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Messages - ritaismyconscience

Pages: [1]
1
Transformer (ferrite core) / Re: Homemade HV transformer
« on: September 14, 2019, 06:35:32 PM »

2
Dual Resonant Solid State Tesla coils / Re: Transistors good for DRSSTC?
« on: September 13, 2019, 05:50:53 AM »
I can also get these:
https://www.infineon.com/dgdl/Infineon-IKW75N60T-DS-v02_08-en.pdf?fileId=db3a304412b407950112b42890113e25

for about a third of the price. Seems like a better idea?

3
Dual Resonant Solid State Tesla coils / Transistors good for DRSSTC?
« on: September 12, 2019, 05:53:51 AM »
So I found a good deal for these transistors:
https://www.mouser.com/datasheet/2/240/ixys_ds99525cixgq24n30pbix5187-1547450.pdf

The main problem I see with using this in a Tesla coil is that it's only rated for 300V. However, it can handle quite a bit of current. Is there anything I should be aware of before buying?

4
Electronic circuits / Re: Induction Heater schematic modification
« on: September 11, 2019, 07:48:43 AM »
Looks like there's a mistake with my circuit. Turning the pot changes the frequency instead of the phase shift. I also found out that the op amp was not needed.

This one should hopefully be correct:


5
I second using a flyback as your supply. You can easily find stuff like this on google:
https://rimstar.org/science_electronics_projects/high_voltage_power_supply_w_flyback_transformer_builtin_diodes.htm
If its too much power you can always add a resistor to the output.

You can also buy a ready made HV module for a few dollars off ebay that run off 3.7V lithium battery. (They advertise numbers like 400000V but are actually around 15-20kV. There is also a capacitor inside so you should probably use a HV resistor to limit the current)

6
Electronic circuits / Re: Induction Heater schematic modification
« on: June 13, 2019, 07:51:18 AM »
Update: Improved layout so it would fit on my blank pcb:


I'll probably make the pcb tomorrow.

7
Capacitor banks / Re: Bought huge capacitors
« on: June 12, 2019, 06:38:07 PM »
One of my other concerns is that my neighbors would get mad at me (it'll probably sound like an explosion)

8
Capacitor banks / Bought huge capacitors
« on: June 12, 2019, 03:02:50 AM »
http://imgur.com/gallery/OcA4IgW

I bought these 15600uF 2800v for 50 dollars each and I was wondering what kind of project I should build with them. I probably won't be able to afford scrs and switching 100kj is likely not easy. Any ideas?

9
Electronic circuits / Re: Induction Heater schematic modification
« on: June 06, 2019, 02:34:30 AM »
There are two terminals for driving the GDT. I will be using this to drive a full bridge of IGBTs on mains voltage. Also I assume that the frequency should change more as the metal melts. See pic below for more information



Edit: I found out that the PNP transistors are backwards. I also made a PCB of this schematic.



Since this is my first time making a PCB there might be a few mistakes I made.

10
Electronic circuits / Re: Induction Heater schematic modification
« on: June 05, 2019, 02:36:18 AM »


Here is my new circuit, which should still lock on the resonant frequency without the arduino. I mostly copied it from uzzors2k. What do you all think?

Edit: Here's the original

11
Electronic circuits / Re: Induction Heater schematic modification
« on: May 27, 2019, 03:44:25 AM »
Well the resonant frequency changes as the metal heats up, so the arduino changes the frequency to match it. There's probably a version which doesn't use an arduino.

12
Electronic circuits / Re: Induction Heater schematic modification
« on: May 27, 2019, 01:11:52 AM »
I don't think the original author intended for it to respond to shorts, I think the goal of the arduino is to slowly change the frequency as the metal heats up.

13
Electronic circuits / Re: Induction Heater schematic modification
« on: May 26, 2019, 04:55:46 AM »
From my understanding (and from the original schematic comments), I think the tank voltage goes through the op amp (I should use the 311 instead probably), then goes through the 4046, then the 4046 finds the phase difference and feeds it into the arduino, which does a few calculations and sends a new voltage back into the VCO. So isn't this closed loop?

14
Electronic circuits / Induction Heater schematic modification
« on: May 26, 2019, 12:44:18 AM »
I found this schematic online:

(There are a few errors, like one of the diodes is backwards and one of the optocouplers is missing +15V.

Because I am a poor student and I don't want to wait for parts, I made this schematic which uses only parts that I have. Basically, I got rid of the optocouplers, which I think act as level shifters. I also added a negative voltage generator because I want to run it off a single 15V supply. 


I don't have a lot of experience, so I would appreciate if someone checked my schematic before I turn it into a PCB. Thanks in advance.
 

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