Author Topic: Electrojolt's Stable PWM Step By Step Assembling Instructions  (Read 11552 times)

0 Members and 1 Guest are viewing this topic.

Offline Login to see usernames

  • Hero member
  • ****
  • Posts: 980
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #24 on: June 17, 2009, 04:20:38 am »
I have my switches on, had to buy a new soldering iron, only burned myself twice.

Truck load of questions for you :) if you don't mind.

1. The Black wires in the corner, what gauge are they?
2. The orange wires, what gauge are they?  (is 22 suitable? i have plenty of it)
3. Each of the three black wires is the ground for each channel, and the orange is the positive?
4. When you use two orange wires, they both act as the positive, so you would join both of them to the primary? and a black to the bottom/other end of the primary?
5. The reason for more orange wires is because larger wires don't fit?

6. if i want to send a gated signal to the primary, i am combining channel 1 and 2, so do i hook up channel 1 or 2 to the primary?
7. The red and black wires on the right side in the middle, these are the input from my variac? (or what is a suitable source?)

8. I have 2 power supplies out of old computers, would it be a useful idea to use this and connect a 12 volt output from the c-ps to the input of the pwm?

9. Is this heat sink too big? 3.5x1.5x1.25, half of a CPU heatsink, i could cut more off if you think it is not needed this big, how hot will these mosfets get?

Thanks :)

« Last Edit: June 09, 2015, 14:49:14 pm by Steve »

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 368
  • Yes I got Jolted,
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #25 on: June 17, 2009, 16:34:02 pm »
No problem

I used 18 gauge wires,

I don't see a problem using 22 gauge specially if you just planing to test with the VIC, since the VIC is not supposed to use a lot of power.

The back wires are the ground source.

the orange wires are the negative output that connect to one side of the primary. the other wire from the primary goes to the positive of your power source.

I personany used 2 orange wires becasue I use this circuit for other experiments, when I drive coils with over 10 AMPS.

To pulse the VIC in gated mode, you use the middle output. 

when you use 2 power supplies, you need to connect the grounds of both PS toguether. Shared ground. then one positive goes to the red wire on the PCB, next to the LM7808.

and the other positive goes to the primary on the VIC.

that heat sink looks fine. it is allways better to have bigger heat sink.

Offline Login to see usernames

  • Hero member
  • ****
  • Posts: 980
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #26 on: June 17, 2009, 17:07:58 pm »
Thanks, I'll probably have some more questions in a few days, but i'm liking how things are coming together.

If you are interested in designing a Frequency Sweeper with a PLL to lock onto resonance, as Stan describes, then i'll be first in line to buy that from you too.

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 368
  • Yes I got Jolted,
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #27 on: June 17, 2009, 17:16:45 pm »
thanks..

Yeah, that is the reason I build this very versitile circuit so we can experiment and try to find the correct signal to perform the magic.....

then once that is found, I can build one that will do it automatically.

Offline Login to see usernames

  • Hero member
  • ****
  • Posts: 980
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #28 on: June 17, 2009, 17:18:45 pm »
Can you build an "add on" sweeper and pll that connects into this pwm, or would it need to be a whole new board?

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 368
  • Yes I got Jolted,
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #29 on: June 17, 2009, 17:24:03 pm »
would have to be a new PCB.

Offline Login to see usernames

  • Hero member
  • ****
  • Posts: 980
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #30 on: June 17, 2009, 23:07:45 pm »
Right on, I just had a thought, for the frequency sweeper, a nice idea would be to have a variable upper and lower range, maybe with two pot's and some switches, so once you figure out the working range for your setup you can just narrow the sweep range to match, or maybe if it sweeps so fast this isn't even needed, i don't know

Offline Login to see usernames

  • 50+
  • *
  • Posts: 68
Re: Electrojolt's Stable PWM Step By Step Assembling Instructions
« Reply #31 on: June 18, 2009, 06:16:13 am »
Engineering a pll around a functionning cell is not some walk in the park .

That schematic provided has to be totally re-done .