 |  |
02-24-2005, 06:13 AM
|
#1 | | Senior Member
Join Date: Mar 2004 Location: South of England
Posts: 158
| Oscilascope
Has anyone hooked up a foil to an oscilascope to look at the switch bounce?
Or could anyone do so and pass on the results to me?
__________________ How does it work? Why doesn't it? How to fix it? How to choose equipment? Look for the answers at www.thearmourer.pwp.blueyonder.co.uk When you know everything you, should stop offering advice. | 
|  | | And now for this message... |
| |
02-24-2005, 06:40 AM
|
#2 | | Senior Member
Join Date: Dec 2004 Location: GREECE/Piraeus
Posts: 1,310
| No, I do not.
__________________
The purpose of tactic is to conquer the enemy with proper war movements and actions.
-Tactics of Emperor Leon 6th the Wise
| |
| | |
02-24-2005, 10:25 AM
|
#3 | | Epee fencing addict
Join Date: Jan 2005 Location: Glenwood, ny
Posts: 2,288
| FYI - Radio Shack sells a multi-meter that can be hooked up to a computer via serial port. It allows you to test equipment and record results over time. The resulting tests can be graphed on the computer. I'm not sure of the resolution in terms of time, but I suspect it would be sufficient for our purposes.
__________________
One test is worth a thousand opinions.
I ain't as good as I once was, but I'm as good once as I ever was. - Toby Keith
"We have met the enemy and he is us." - Pogo | |
| | |
02-24-2005, 10:35 AM
|
#4 | | Senior Member
Join Date: Nov 2002 Location: Reading, UK
Posts: 300
| Try using on of the osciloscope programs that run through your sound card (A sound card is effectively a low res frequency analyser /generator). I don't know if these would have the resolution needed but give it ago.
Here is a link to the first thing that "sound card oscilloscope" comes up with in google. http://polly.phys.msu.su/~zeld/oscill.html | |
| | |
02-24-2005, 11:11 AM
|
#5 | | Member
Join Date: May 2004
Posts: 83
| You can do that, but you need a memory oscilloscope to take a good look
at the signal. And of course a voltage supply, but that goes without saying...
I think I take a look at the soundcard scope, it sounds interesting. | |
| | |
02-24-2005, 11:27 AM
|
#6 | | Senior Member
Join Date: Mar 2004 Location: South of England
Posts: 158
| Looks cool.
The resolution looks fine.
Correct me if I'm wrong but it looks like a freebee too :-)
Has anyone used it?
My concern (off the top of my head) would be the posibility of frying something on the sound card, or worse, the mobo.
__________________ How does it work? Why doesn't it? How to fix it? How to choose equipment? Look for the answers at www.thearmourer.pwp.blueyonder.co.uk When you know everything you, should stop offering advice. | |
| | |
02-24-2005, 11:57 AM
|
#7 | | Senior Member
Join Date: Nov 2002 Location: Reading, UK
Posts: 300
| There are a few others out there (some rather more recent than that).
The software scopes of themselves shouldn't fry your sound card....However, you will need to put a voltage across the mic socket to get anything (The card detects voltage not resistance). So before you try anything find out what the maximum voltage that your sound card can take is.
after a quick look (check your self before you do anything) around keeping it under 2V should be ok. | |
| | |
02-27-2005, 12:01 AM
|
#8 | | Senior Member
Join Date: Nov 2004 Location: Kent
Posts: 156
| i have an ocilliscope, let me know exactly what experement you want run and i'll do it. Quote: |
Originally Posted by TheArmourer Has anyone hooked up a foil to an oscilascope to look at the switch bounce?
Or could anyone do so and pass on the results to me? | | |
| | |
02-27-2005, 12:06 AM
|
#9 | | Senior Member
Join Date: Nov 2004 Location: Kent
Posts: 156
| also i looked at the sound card program it won't work. it can't samle less that 25ms. the break in foil to set a point is 15ms. | |
| | |
02-28-2005, 01:46 PM
|
#10 | | Senior Member
Join Date: May 2003
Posts: 562
| Once you get your Oscilloscope working, Try hitting the blade with another blade you will see the shock wave making the the contact through the earth circuit to centre wire breaking. Thats why when the rules for non target hits were first brought out they had to increase the minimum break time to 2 ms to prevent offtarget lights occuring on the meeting/beating of blades.
So too the American father who brought back a blade a second time insisting that his sons blade was still faulty (it was the first time) because he was an expert and he could show breaks in the circuit by hiting the forte region, 'a little knowledge is some times dangerous.' | |
| | |
02-28-2005, 03:39 PM
|
#11 | | Senior Member
Join Date: Nov 2002 Location: Reading, UK
Posts: 300
| Quote: |
Originally Posted by smeric28 also i looked at the sound card program it won't work. it can't samle less that 25ms. the break in foil to set a point is 15ms. |
are you sure? It claims to have a 5ms sweep.
There are other more recent programs out there as well. which seem better or at least more user griendly.
again google is your friend. | |
| | |
03-01-2005, 06:29 AM
|
#12 | | Senior Member
Join Date: Mar 2004 Location: South of England
Posts: 158
| Thanks for the tip Barry.
A little more knowledge and I'm a little less dangerous. Whoo hoo!
(And they said I'd always be dangerouse - murhaa haa haa.)
__________________ How does it work? Why doesn't it? How to fix it? How to choose equipment? Look for the answers at www.thearmourer.pwp.blueyonder.co.uk When you know everything you, should stop offering advice.
Last edited by TheArmourer; 03-01-2005 at 06:34 AM.
| |
| | | Thread Tools | | | | Display Modes |  Linear Mode | 
Posting Rules
| You may not post new threads You may not post replies You may not post attachments You may not edit your posts
HTML code is Off | | | All times are GMT -4. The time now is 09:45 AM. |
| |
