15 Apr
2012
15 Apr
'12
3:25 p.m.
On 15 Apr 2012 at 12:20, Eric Smith wrote:
Chuck Guzis wrote:
Hence my coffee can container. Not convenient to turn upside down
and stare into. One could add a microswitch or even a mercury switch
to enforce an interlock, but I never found it necessary.
just google for "germicidal lamp" Not
horribly expensive. Add an
inexpensive mechanical timer if you'd like and you're all set.
But remember, the short-wave UV can harm your eyes fairly quickly.
Catching a brief glimpse of it won't hurt you, but avoid looking at it
any longer than that. Put it in an opaque container. I strongly
recommend installing a switch that turns off the lamp when the
container is opened. If you're in a hurry, it is also possible to use a
Xenon or Krypton
flash tube (provided that it is made from quartz class to not filter
out the shortwave UV) to erase the EPROMs nearly instantaneously.
Needless to say, this is even more potentially harmful to the eyes.
Should be easy enough to find if one hoarded the disposable camera
innards. A carbon arc will also do just fine (I remember how
brightly the luminous face on a watch would glow when held to the
observation port of an Ashcraft projector can. See
https://www.youtube.com/watch?v=5Jqc4GiMQE0). A MIG welder would
also probably generate enough short-wave UV.
I wonder if enough UV would get through, say, an ordinary 75 watt
mercury-vapor luminaire.
--Chuck
16 Apr
16 Apr
12:20 a.m.
I wrote:
If you're in a hurry, it is also possible to use a
Xenon or Krypton
flash tube (provided that it is made from quartz class to not filter
out the shortwave UV) to erase the EPROMs nearly instantaneously.
Needless to say, this is even more potentially harmful to the eyes.
Chuck Guzis wrote:
Should be easy enough to find if one hoarded the
disposable camera
innards.
The ones I've seen use a normal glass envelope, so much of the
shortwave
UV is filtered out.
5:40 a.m.
On Apr 16, 2012, at 3:20 AM, Eric Smith wrote:
I wrote:
They make great little improvised tasers, though, if you extend the
storage cap leads out. :-)
- Dave
If you're in a hurry, it is also possible to
use a Xenon or Krypton
flash tube (provided that it is made from quartz class to not filter
out the shortwave UV) to erase the EPROMs nearly instantaneously.
Needless to say, this is even more potentially harmful to the eyes.
Chuck Guzis wrote:
Should be easy enough to find if one hoarded the
disposable camera
innards.
The ones I've seen use a normal glass envelope, so much of the
shortwave UV is filtered out. 
6:26 a.m.
On 16 April 2012 13:40, David Riley <fraveydank at gmail.com> wrote:
They make great little improvised tasers, though, if you extend the
storage cap leads out. :-)
In the UK, at least, just by doing that you can face a charge of
"manufacturing a prohibited weapon". 8-|
This lad was lucky and got away with it:
http://menmedia.co.uk/manchestereveningnews/news/s/1490483_court-frees-phys…
6:46 a.m.
On Apr 16, 2012, at 9:26 AM, Rob wrote:
On 16 April 2012 13:40, David Riley <fraveydank at
gmail.com> wrote:
*sigh* Yes, here in the US they let us own a great deal more dangerous
weapons once we've reached the age of majority (I think it may be a
secret population control plan). I don't think they're worried about
people getting a (generally non-lethal) shock from camera flashes.
- Dave
They make great little improvised tasers, though, if you extend the
storage cap leads out. :-)
In the UK, at least, just by doing that you can face a charge of
"manufacturing a prohibited weapon". 8-|
This lad was lucky and got away with it:
http://menmedia.co.uk/manchestereveningnews/news/s/1490483_court-frees-phys…
9:57 a.m.
In the UK, at
least, just by doing that you can face a charge of
"manufacturing a prohibited weapon". 8-|
This lad was lucky and got away with it:
http://menmedia.co.uk/manchestereveningnews/news/s/1490483_court-frees-phys…
*sigh* Yes, here in the US they let us own a great deal more dangerous
weapons once we've reached the age of majority (I think it may be a
secret population control plan). I don't think they're worried about
people getting a (generally non-lethal) shock from camera flashes.
10:27 a.m.
On 4/16/2012 10:57 AM, Gene Buckle wrote:
I keep wondering when they're going to change the
UK flag to be
reflective silver stripes on a safety yellow background...
When the boatload of duct-tape sp? comes from Canada. Mind you
then they would have to get new t-shirts for all the girls that want
wear the the UK flag as a outfit.
g.
10:41 a.m.
New subject: Amiga PIO-Gen
Genlock for the Amiga 500, 1000, 2000?
In box, probably never used, but kicked around for a long time.
Anybody have a use for it?
(Pickup in Berkeley, or pay $20 (rounded UP) for Priority Mail postage)
--
Fred Cisin cisin at xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236
12:33 p.m.
*sigh* Yes, here in the US they let us own a great
deal more dangerous
weapons once we've reached the age of majority (I think it may be a
secret population control plan). I don't think they're worried about
people getting a (generally non-lethal) shock from camera flashes.
To be fair, I don;t think there's any law over here about making HV power
supplies or using parts from camera flash units in a hobbyist workshop.
There's better not be, becuase I've broken it many times...
However, if you use said parts to make sonething that is intneded to be a
weapon, then you are breaking the law alas. In otehr words a handheld
case with spikes on the HV output is a no-no.
But please don;'t get me started on our _ridiculous_ health-and-safety
rules. The one that annys me is that it's perfectly legal for me to make
things in my hobbyist workshop (for example a drive roller for an HP9810
card reader). It's perfectly legal for me to tell others how to make it.
It's legal for me to allow friends to use my workshop at their own risk.
But if I start making and selling siad part as a favour for other
enthusiasts I would have ot meet so many H&S requirements in my workshop
that it simply isn't worth it.
-tony
1:01 p.m.
On 04/16/2012 03:33 PM, Tony Duell wrote:
I'm certain that, if you stay under the radar and don't make a huge
production of it, things will be fine. We have all sorts of crazy laws
here too (though not quite as bad as the far older UK) and most of the
get ignored, by citizens and judges alike.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
*sigh* Yes,
here in the US they let us own a great deal more dangerous
But please don;'t
get me started on our _ridiculous_ health-and-safety
rules. The one that annys me is that it's perfectly legal for me to make
things in my hobbyist workshop (for example a drive roller for an HP9810
card reader). It's perfectly legal for me to tell others how to make it.
It's legal for me to allow friends to use my workshop at their own risk.
But if I start making and selling siad part as a favour for other
enthusiasts I would have ot meet so many H&S requirements in my workshop
that it simply isn't worth it.
17 Apr
17 Apr
12:18 p.m.
[Health and safety rules i nthe UK]
I'm certain that, if you stay under the radar
and don't make a huge
Unfortunately I am 'on the radar', not under it. I foolishly asked what
the rules/regulations would be, so alas they know about me...
Whether they would take action I don't know, but it doesn't seem worth
risking it.
-tony
16 Apr
16 Apr
11:52 a.m.
Should be easy enough to find if one hoarded the
disposable camera
Do camera flash tubes emit enough UV for this? Since it wouldn't be
required for the intneded applciation of taking photos, and since, I
guess, a special quartz tube is needed, I a doubtful.
I wonder if enough UV would get through, say, an
ordinary 75 watt
mercury-vapor luminaire.
I doubt it. The 'black light' tubes used in discos, etc, and the
PCB-exposure tubes do not generate enough far UV to erase EPROMs in a
sensible time.
The UV erase tube looks very different to a PCB exposure tube. The former
is transparent (quartz I guess) amd you can see little globules of
mercury inside. The latter look more like normal fluorescent lamps.
Of course, as somebody said earlier there is a big differece between
corrupting the data in an EPROM and fully erasing it for reprogramming. I
would not storew a valuable EPROM under any UV source, there's a good
chance that Murphy's law will apply and you'll loose at least one bit.
Coversely, if you want to erase an EPROM you can leave it there for weeks
and the last bit will never clear...
-tony
3:48 p.m.
On 16 Apr 2012 at 19:52, Tony Duell wrote:
Well, a 75W mercury-vapor luminaire is awfully bright. Perhaps if
you removed the outer envelope.
I suspect the real answer is "run whatever it is that you're
interested in using for a minute or so. If you can smell ozone,
it'll probably work."
--Chuck
I wonder if
enough UV would get through, say, an ordinary 75 watt
mercury-vapor luminaire.
I doubt it. The 'black light' tubes used in discos, etc, and the
PCB-exposure tubes do not generate enough far UV to erase EPROMs in a
sensible time.
17 Apr
17 Apr
1:14 p.m.
Well, a 75W mercury-vapor luminaire is awfully bright.
Perhaps if
you removed the outer envelope.
Actually, I think that might work. The inner discharge tube is most
likely quartz, and one of the functions of the outer envelope is to cut
off UV.
Try running a glss cutter round it just about the cap and giving it a
sharp tap...
-tony
4632
days inactive
4634
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13 comments
9 participants
participants (9)
-
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
cclist＠sydex.com -
cisin＠xenosoft.com -
eric＠brouhaha.com -
fraveydank＠gmail.com -
geneb＠deltasoft.com -
mcguire＠neurotica.com -
robert＠irrelevant.com