Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 67 users online :: 4 registered, 0 hidden and 63 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

uber-gauss gun idea

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Unread postAuthor: paaiyan » Tue Nov 13, 2007 2:41 pm

So I honestly haven't played with capacitors much. For a 100 volt cap, do you need a 100 volt source to charge it all the way, or can you use something lower voltage that will just take longer?
  • 0

"Who ever said the pen was mightier than the sword, obviously, never encountered automatic weapons."
-General Douglass MacArthur

Read my dog's blog - Life of Kilo
User avatar
paaiyan
Major General
Major General
 
Posts: 2140
Joined: Wed Dec 27, 2006 10:03 pm
Location: Central Oklahoma
Country: United States (us)
Reputation: 1

Unread postAuthor: jimmy101 » Tue Nov 13, 2007 5:20 pm

paaiyan wrote:So I honestly haven't played with capacitors much. For a 100 volt cap, do you need a 100 volt source to charge it all the way, or can you use something lower voltage that will just take longer?

You need a 100V source to charge a cap to 100V. But, the source doesn't have to be continous, and indeed it usually isn't.

The typical photoflash board from a disposable camera converts 1.5V to ~300V pulses. The pulse duty cycle is usually pretty small, it is "off" for a lot longer than it is "on". IIRC, the photoflash boards cycle at 2KHz to 20KHz (or more) and have a duty cycle of perhaps 10%.

A diode is usually wired in series with the cap so the supply can charge the cap when the supply is "on" but the cap does not push current back into the supply when the supply is in the "off" part of the cycle.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3128
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: paaiyan » Tue Nov 13, 2007 5:21 pm

So, I could use an inductor coil to charge it then?
  • 0

"Who ever said the pen was mightier than the sword, obviously, never encountered automatic weapons."
-General Douglass MacArthur

Read my dog's blog - Life of Kilo
User avatar
paaiyan
Major General
Major General
 
Posts: 2140
Joined: Wed Dec 27, 2006 10:03 pm
Location: Central Oklahoma
Country: United States (us)
Reputation: 1

Previous

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'