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AN-925: Radiation Design Test Data for Advanced CMOS Product -
National Semiconductor Application Note (app note added 2/06)
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AN-926: Radiation Design Considerations using CMOS Logic -
National Semiconductor Application Note....[App Note] |
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Build this Negative Ion Detector - Figure 1 shows a schematic
diagram of the Ion Detector--a rather simple circuit consisting of three
transistors (two PN2907 PNP, and a single PN2222 NPN type), three
resistors, one capacitor, an antenna, a mA meter, and an LED.... [by
Vincent Vollono] |
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CDV700 Geiger Counter Probe Rebuilding - This article describes
the process of rebuilding a geiger counter probe from the Victoreen CDV700
geiger counter. The process of converting the hard-wired... [Circuit
Design by Forrest Cook] |
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Cheap but Sensitive Radiation Detector - This project started
out as a gag project, a "Nuclear War Detector". The idea was to make a
device that would flash a little red light if a nuclear attack were
underway or if there were some sort of massive radiation spill right
outside the house. It would be like a rain detector built into an
umbrella, perfectly functional but totally useless....(added 05/05/05)
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Circuit forms gamma-photon detector - 24-Apr-03 Issue of EDN The
circuit of Figure 1 includes a PIN photodiode that detects individual photons of gamma
radiation. The reverse bias on the photodiode sometimes creates a depletion region.
When such a photon strikes this depletion region, a small amount of charge develops.
This charge is proportional to the photon's energy.... [Design Idea by Bruce Denmark,
Maxim Integrated Products, Sunnyvale, CA] |
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Count Accumulator for Radiation Levels (CARL) - The CARL device is
an add-on numerical counter that plugs into the headphone jack of 1960s
vintage geiger counters such as the Victoreen CDV700 and CDV700-6B. It
should also work with the Lionel ENI/LENi counters, and any other geiger
counter that has a headphone ...(electronic design added 06/09) |
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Count Accumulator for Radiation Levels CARL - The CARL device is
an add-on numerical counter that plugs into the headphone jack of 1960s
vintage geiger counters such as the Victoreen CDV700 and CDV700-6B. It
should also work with the Lionel ENI/LENi counters, and any other geiger
counter that has a headphone output pulse greater than -5V. Vintage 1960s
era geiger counters don't actually count, they use an analog meter with an
integrator circuit to give short-term averaged....(circuit added 05/06/07)
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Darling SE Tube Amplifier - Scroll down to find this circuits.
In the diagram I've put the transistor numbers as the ones I've used,
although you can use standard 2n3904's etc in these positions without
problems as they're similar spec. The transformer used is a normal audio
output transformer, such as an LT700....(added 04/05/06) |
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Geiger counter - Schematic only, no circuit description |
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Geiger counter - Geiger counters are available in all shapes and sizes, but
they tend to be quite expensive to buy (typically a couple of hundred US dollars for a
simple model, rising to a thousand dollars or more for a professional instrument). For
a first-timer, and/or a reasonably experienced electronics hobbyist, building your own
can be a very rewarding alternative.... |
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Geiger Counter imagesco - (electronic circuit added 4/05) |
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High Voltage Generator for Geiger Tubes - The following two circuits are an
improvement over the older circuits below. The circuits are shown generating 500 volts
but they may be modified to supply a couple of hundred to nearly 1000 volts by
changing the zener diodes. The difference is subtle; the feedback signal increases the
voltage on the base of the 2N4403 to stop the oscillator instead of stealing current
from the capacitor on the emitter. The result is much lower power dissipation when
there is little or no load on the high voltage....(electronic circuit added 7/03)
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High-Value Resistor from Neon Lamp - (added 04/05/06) |
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Hot Rodding a CDV700 Geiger Counter - This project involves making several
modification to an early 1960s era Victoreen CDV700 or CDV600-6B geiger counter. These
counters are available on E-Bay for around $50 to $100. The modifications use modern
electronic parts to improve the counter's stability, extend the run time, and add a
solar recharging capability....(electronic design added 6/07) |
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Ion Chamber Bias Supply (Battery Topper) - After discovering that one of my
bias batteries was jumping around a few volts, wreaking havoc with the readings, I
decided to build a floating, regulated high voltage supply. The result is a
micro-power 110 volt supply that runs on an ordinary 6V.... |
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Ion detector - Schematic only, no circuit description |
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Ion Detector - Figure 1 shows a schematic diagram of the Ion Detector--a
rather simple circuit consisting of three transistors (two PN2907 PNP, and a single
PN2222 NPN type), three resistors, one capacitor, an antenna, a mA meter, and an
LED.... [by Vincent Vollono] |
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Modifications for CDV700 Geiger Counter - (diagram added 05/06/07)
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Negative Ion Detector - Figure 1 shows a schematic diagram of the Ion
Detector--a rather simple circuit consisting of three transistors (two PN2907 PNP, and
a single PN2222 NPN type), three resistors, one capacitor, an antenna, a mA meter, and
an LED.... [article by Vincent Vollono] |
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Neon Bulb Quench Experiment - .... |
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Neon Lamp as Resistor - It seems to be common knowledge that a NE-2 or
similar neon lamp can be pressed into service as radiation (x-ray) detector. But can a
simple lamp serve as a low-level detector, possibly replacing a Geiger tube?
Initial.... |
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Nuclear War Detector - The circuit is similar to the earlier darlington
circuits except that the output transistor is a mosfet transistor like the BS170 or
2N7000 and the load is an LED with a built-in flasher circuit. The circuit as shown
will draw ….... |
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Polonium Pen - Recent events point to the need for a simple device for
testing cocktails and beers for excessive quantities of polonium. The Polonium Pen is
a pocket-sized ion chamber with LED readout that is perfect for the job. Simply hold
the Polonium Pen over your drink and, if the LED lights up, order something else....
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Radiation Design Considerations using CMOS Logic - National Semiconductor
Application Note....[App Note] |
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Radiation Design Test Data for Advanced CMOS Product - National
Semiconductor Application Note....[App Note] |
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Radiation Hardened Performance of Discrete Semis - MicoNote 50 from
Microsemi....[App Note] |
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