## Search found 35 matches

Fri Sep 24, 2004 10:31 am
Forum: General Discussion
Topic: Ferrox Cube
Replies: 8
Views: 4076

### Re: Ferrox Cube

Sorry, i was in a hurry. Ferrox Cube.
Thu Sep 23, 2004 11:17 am
Forum: General Discussion
Topic: Ferrox Cube
Replies: 8
Views: 4076

### Ferrox Cube

Anyone know of a distributer of Ferrox ube cores and bobbins that will sell to the publics without huge minimum orders?
Wed Sep 22, 2004 11:05 am
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Thanks so much for all the help Mr.Al. I think that I understand, so i will try it and see what happens. I'll keep you posted.
Mon Sep 20, 2004 10:49 am
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Thanks Al, my transformer, has a center-tapped primary, a base feedback winding, and center-tapped secondary. And I have no idae how to model it, I have tried to use several transformers and set the turns ratio as needed, but the ratios are shared and I can't figure out how to make them unique. Plea...
Wed Sep 08, 2004 7:44 pm
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Oh man, you guys are a great help. Now i just need to figure out how to model a custom transformer in spice, any ideas ? But, thanks so much for the cap formulas.
Wed Sep 08, 2004 10:22 am
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Is the formula for a cap's charging current, I=Io*(1-e^(-t/RC))? Thanks or all the help.<p>[ September 08, 2004: Message edited by: camino75080 ]</p>
Tue Sep 07, 2004 10:51 am
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Buy chance, I am calculating the current though an arc. What would be a good aproximation of the arc's resistance?
Mon Sep 06, 2004 6:22 pm
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Thanks Al, I dint realize there were there were other formulas, I looked on the internet and only for PHD research papers, that sucked, I could make any sense of them!
Mon Sep 06, 2004 12:31 pm
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Okay, thanks. So if I plugin time time constant for a given resistor/capacitor combination, for S then I get the current . Thanks again for the help
Mon Sep 06, 2004 7:30 am
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Re: Capacitive discharge

Colin, thanks for the formula, i was way off, but I don't understand how that works without having the resistance. If you can, would you please explain that. Thanks again for the help.
Sun Sep 05, 2004 9:55 pm
Forum: General Discussion
Topic: Capacitive discharge
Replies: 25
Views: 5717

### Capacitive discharge

Man, am I on a roll tonight. Anyway a am looking for a formula calculate the current of a capacitive dischare, varibles: voltage, current (duh), and resistance. So far I've got this I=(((C*C)*V*R)/2). Please help me.
Sun Sep 05, 2004 9:50 pm
Forum: General Discussion
Topic: Another spice question
Replies: 0
Views: 901

### Another spice question

How do you make a custom transformer? I am desighing a saturable core inverter and need to make a custom transformer model. PLEASE HELP ME!
Thu Aug 05, 2004 9:31 am
Forum: General Discussion
Topic: Heating Element Question
Replies: 9
Views: 2106

### Re: Heating Element Question

Okay, guys new plan, what is I puts 2 supercaps in series, and then used a simple current mode ps. Could that work?
Wed Aug 04, 2004 7:33 am
Forum: General Discussion
Topic: Heating Element Question
Replies: 9
Views: 2106

### Re: Heating Element Question

Thanks for the ideas here are my answers:<p>Dale Y: The super cap will be charged from a charging base in about 5 min. The batteries were AA rechargable alkine because, you have to hold the tool like a pencil to trimm the bird's nails.<p>stephen: I'm wasn't trying to control the temperature, I was t...
Tue Aug 03, 2004 10:53 pm
Forum: General Discussion
Topic: Heating Element Question
Replies: 9
Views: 2106

### Heating Element Question

I'm sorry I ask so many questions, I dont know as much as would like to think. Sorry for the long post, this is a very puzzling promblem for me so I have explained as best I could. Thanks for any help.<p>A bird store I goto uses a tool consisting of a battery switch, and Ni-Chrome element to trim th...