If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Interesting idea of the week:- Make a miniature keyring sized Geiger counter that does not beep but instead pulses a vibrate motor from a mobile phone. Short pulses would be ignored but repeated pulses would be very obvious the closer one gets to a dangerous radiation field, with an LCD to display the actual dose and a speech chip to warn audibly just to make sure. The same approach could also be used for 3G and microwaves etc so people can see if they are near a wifi access point etc.
Another related idea, use Stella/Proud Mary's generously donated fluorescent screens and ZP1314's to make a 3 wave (alpha, beta/gamma, X-ray) sensor using my pyrographite based end window method and a modified Aixiz module. Turns out that vacuum can be generated of the required level (0.01atm) using a modified fridge compressor with a peltier cold trap in series according to the folks on the fusor forums.
EDIT:- Yes, running the assembly in a vacuum would certainly boost efficiency. I've confirmed that the 2005 internal USB ISight cameras used on older Mac's with the A3 sensor can be used as alpha sensors, the colour filter used doesen't seem to affect them much. The graphite does need to be very thin indeed, as thin as you can make it and as close to that chip as possible to maximise the conversion efficiency. The sensor is a 640*480 backlight compensated one and putting a small dot of silver scintillator on the back of the graphite would also help.
It might be worth experimenting with multiple corona wires, as this should noticeably increase the sensitivity. A "Flat" tube would also be an interesting experiment as these have been known to be very sensitive indeed if run in a strong kGauss static magnetic field to polarise the gas inside.
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Geiger counter hacking
