The inductor is made with copper wire, which is rather conductive to say the least - thereby putting a short circuit across a capacitor which cannot charge in the first place. As hinted perviously, the Xenon flash tube *is* the switch. So if you want the capacitor to charge, and at some pre-determined time to discharge into the LC circuit, you will need to add a switch (hint: an SCR will do).
Actually he wrote 1948, but he swapped the last two digits. Check the original copyright date.
Yes.
There is no "second" switch.
No - work out why before you electrocute yourself please.
Your "theory" is screwed!
On a sunny day (Fri, 3 Nov 2006 10:51:38 +0100) it happened "Frithiof Andreas Jensen" wrote in :
If anyone had bothered to look up and _read_ the original article, you would find they _do_ use a swicth, take out the flashbulb, and replace it with a coil.
Original text: # Blitzschaltung eines alten, externen Fotoblitzes mit Lichtleitzahl 24. Der Kondensator dieses Blitzgerätes hat eine Kapazität von 330?F und 330V Spannung. # Selbstgewickelte Spule, Maße: 4,5*8cm, lackierter Kupferdraht, 1mm dick, 5 Windungen
So a home wound coil of 4.5 x 8 cm of 1mm thick wire, 5 turns, in series with a switch, with a HV cap of 330uF at 330V.
RFID-Zapper:
You close the switch, and bingo.
RFID detector (click the small pictures for diagram and PCB coil):
- judgement is passed much more efficiently without excessive knowledge ;-)
Spannung.
Windungen
BUT - The flash tube is such a nice High Current switch and the trigger mechanism is conveniently compatible with timers e.t.c. It would be a shame not to use it!
On a sunny day (Fri, 3 Nov 2006 11:46:49 +0100) it happened "Frithiof Andreas Jensen" wrote in :
True, but I'd suspect a lot of energy to go into the flash, and less into the coil.
Thompson's a Bushist. Talking sense to him is like talking to a brick.
Good Luck! Rich
snip.
Thanks, it looks pretty interesting. I gathered up a lot of those
1-shot cameras just for the HV caps for a spark eroder I built. There's a lot of other useful bits in them as well. In many cases, there's still the AA cell, which is barely discharged.One warning, in nearly every one, the HV cap still had about 150-200V on it, even after weeks, It could catch you out, if you are unaware of this.
Anyway, has anybody here actually tried it as an RFID Zapper? More usefully, would it damage the cellphone of the idiot user babbling away next to me on the train?
Barry Lennox
Quite true, I made a point of reading "1984" in 1984 over the Xmas break. It was not very accurate, but not a bad read nevertheless.
However, it comes closer to describing Britain in 2006 with cameras on every street corner, a gross loss of privacy, coppers shooting innocent electricians then walking free, B-liar shouting "global warming" as a distractor and a mad immigration policy that allows in thousands of hate-filled religous zealots.
Barry Lennox
On a sunny day (Sat, 04 Nov 2006 08:27:22 +1300) it happened Barry Lennox wrote in :
This is exactly one of my fears, we will get RFID tags in passports for example. A new passport is expensive, and I dunno how many times they are prepared to issue one, and if you go abroad and are not sure the tag works...... Better keep all those things is a metal box or envelope.
You can use one at the airport to zap all passports.......
oops.
I was talking to my brick yesterday..... I said
'Hey, you're oblong in a three dimensional sort of way and kind of ruddy brown.'
We had a cuddle later.
DNA
Was that the one where you had to type your name and ID code into a teletype machine, every place you went?
He wrote "1984" _in_ 1948, duh.
No - you didn't have to, because Big Brother even had cameras in your house. They were watching you 24/7.
We had to read it in high school English, and I found it very frightening and strangely prophetic. We also read "Animal Farm", and I was able to see the equivalent actually happening in society before my very eyes.
But I seem to be the only one on the planet who got the point. (or at least, in the USA.)
Thanks, Rich
That would be fun. I see the two guys arrested after the Heathrow epic in August have been released, insufficient evidence....
But where do you get RFID tags from, to test to destruction? My little village(1) has barely caught up to the barcode era, and most things dont seem to have RFID tags (yet).
(1) nor does it have traffic wardens, or parking meters or CCTV, but I just found out where the brothel is.
martin
It is indeed, and it still is a good reading (can actually enjoy rereading it one of these days, it has been 15 years now since I last read it). The final sentence of the novel ("He loved Big Brother...") is perhaps the most chilling one I have ever read.... and so applicable to our day.
Dimiter (supposedly no longer in Seldon mode :-)
Richard The Dreaded Libertarian wrote:
Nope, there were "Telescreens" , cameras and microphones all over the place to catch out wrongdoers. There's a good summary at
The Teletype machine rings a bell, there may have been something like that in Brave New World or Fahrenheit 451, it's been a long time since I read them
Barry Lennox
Me too, I read them all decades ago. I haven't seen much decent SCI FI in print, in years. I got so desperate that I started writing some of my own.
But sir! Gotta have a bunch of hate-filled zealots to "justify" repressive measures! Without them, the repressionists would be out of a job!
example.
Do not fall into a hole...
"Michael A. Terrell" wrote in news: snipped-for-privacy@earthlink.net:
try reading James P Hogan's stuff. The Two Faces of Tomorrow,the "Giants" trilogy,Bug Park,Voyage From Yesteryear. Greg Bear is also OK. Darwin's Radio and Darwin's Children are good reads.
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