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K107 GK5 w/LND712 Geiger Counter by Atomic.dave
[email protected]
This is a one of a kind custom hand-made Geiger Counter built by
Atomic.Dave. It is based on a kit de-signed by the original creator
of the DIY Arduino based Geiger Counter Kit- Brohogan. For over 3
years, Ihave built and sold over 100 of these kits, with very good
results, and fantastic feedback by ebay customers.All information
for this kit is available at the developers website and its a good
idea to visit the site from timeto time as the software and other
parts of it may change, upgrade or improve. As I have said before,
this ismore of a kit for someone who knows a little bit about
electronics but doesnt have the time or patience tobuild it, or
would rather someone else do all the dirty work. Having been
builtby me, of course there will be some imperfections, although as
minimal aspossible. These instructions will help you to understand
the basic operationof this meter. Once you have used it a couple
times, it should be pretty easyfor you to operate.
OPERATIONOn the face of the unit starting from the top are IR
sensor, LCD backlitdisplay, 2 LEDs, piezo vent, 1 momentary button,
and 4 triple pole slideswitches. Follow the label to locate the
listed switches below:
IR Sensor (Small hole just above the display)Under this small
hole is the IR for the wireless remote control, so when operating
the remote, try to aim it tothis general location. The other small
hole below the LCD display is the vent for the piezo.
LEDSAfter powering the GC on, you will hear the beeping of the
piezo as your internal LND712 GM tube picks upradiation events. The
GREEN LED will coincide with the beeping piezo but can be muted
with the SNDswitch. The RED LED will only light up when a set alarm
threshold is reached. Both LEDS can be turned offfor indiscreet
radiation monitoring. The two switches for this operation are the
ones listed as LTS and ALM.Middle postion is off.
SWITCHESA. PWR Power switch controls the power and charging of
the GC. Up turns it on the GC with battery power,Middle turns it
off, and Down position is for charging the unit. To charge the GC,
push down the USB powerswitch on the left side of the GC, as well
as have the PWR switch down. When you do this, a RED LED to
theright of the USB port will remain constant RED while charging,
and will turn BLUE when charging is com-plete. If you wish to power
the unit with the USB in, and bypass the batteries for extended
periods, put thePower switch in the middle position, and push the
USB power switch UP. Always keep the USB power switchin the UP
POSITION when powering the unit with the batteries. It only goes
DOWN for charging.B. LTS This is the Light switch that controls
both the GREEN Event LED and the LCD Backlight. Up turns onboth,
Middle turns both off, and Down turns on just the LED, and turns
the Backlight off for power saving. C. MODmomentary switch (Green,
located below the piezo vent ) does 4 things. 1- Alarm control. 2-
Scaler modestart/stop. 3- Alarm 30 second mute. 4- Menu reset.
1.When you first power on the unit, you will see:Atomic.Dave
K107
LND712 GK5qv10.3C
This customized first welcome window can easily be changed if
you want, by doing a little programming in Ar-duino. Refer to the
ARDUINO section for more detailed instructions. But the default is
now set to my name, Kit110, and the second line is the Geiger
Counter Tube and the version of software that the AT328 chip is
runningwhich is v10.3C.
Then a second window will come up with the first line showing
the current set uSv to CPM conversion rate.100 CPM=1 uSv/h
Running at 5.24V
The second line refers to the current voltage that your system
is running at. This is a 5 volt system. The3200mAh 3.7v lipo
battery is boosted to 5v with a pololu booster. Everytime you start
up your GC (geigercounter) it will show you this so you will always
know your current voltage.
The third window will show this:Alarm Set ?
Now at 500 CPM
At this point, you can push the MOD button to incrementally
change the Alarm threshold number. Onceyou stop holding down the
button and wait, it will be set to the current number shown on the
screen and willstay there until you change it either again
restarting and waiting for this part, or by using the included
remotecontrol to change it. You can also choose from units of
measurement such as CPM or uSv/h for the Alarmwith the remote.
USB PORT &STATUS LED
AUDIOOUTPUT
USB PWR
NULLLND712
FITTED SILICONE BOOT
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2. It also acts like a stopwatch starter for the scaler mode. It
has two preset times of 1 minute and 10minute averaging. You can
change this with the remote, or the sketch when connected to pc.
Although it ismuch easier with the remote obviously. Push the
button and the timer starts where the first line is countingdown
from 60 seconds. The numbers on the left are the current total
events during this timed one minute. Thenumbers on the right is the
seconds counting down from 60 to 0. Same thing goes for the second
line, but for10 minutes.
3.When your alarm goes off you can tap this button to mute the
alarm for 30 seconds. 4. After programming your unit with the
wireless remote, if you want to reset it to default settings.
Hold
down this button while the unit starts up.D. ALM The Alarm
switch controls the Alarm RED LED and Piezo. Up for both on, Middle
for both off, andDown for LED only on. This makes for a silent
visual alarm.E. SND The Sound switch controls the Event speaker. Up
for tone mode, Middle for mute, and Down forStandard Click Mode.
More on Tone Mode later.F. NULL The black tactile button (located
on the very top next to the LND712 grill) is used in "Tone
Mode"where clicks are replaced by a tone which varies in pitch
based on the CPM. When pressed, a new baselineis created for the
pitch so if you are moving to an area with a higher background the
pitch will still indicatechanges at the new level.
DISPLAY IN DEPTH:
The top line shows the CPM (updated every 5 sec. by default) and
a quick response bar graph (updated20 times / sec.). The bargraph
will be replaced with ALARM if the displayed CPM exceeds the alarm
thresh-old. It is also replaced by Vcc when it drops below 4.2V.
The second line shows the dose unit and the calculateddose. The
dose unit and the dose ratio (CPM to dose unit) are settable in the
menu (controlled by the wirelessremote or via arduino). Pressing
the Select button while in this screen will switch to the Scaler
screen . . .
Two scalers are provided, each with its own period. The scaler
on the top line is fixed at one minute andthe scaler on the bottom
line is set to a programmable period from the menu. Each scaler has
two modes -counting and ongoing. The screen on left shows both
scalers counting. A running total of the counts is dis-played,
along with the amount of time left for the scaler period. The
screen on the left shows that the oneminute scaler finished the
counting mode and is now showing the average CPM and dose rate for
the period.These values now become a moving average. The bottom
scaler can also be set to "Infinity" in the menu bysetting it below
2. This is a special mode that shows the total accumulated dose
since the scaler screen wasfirst started. Pressing the Select
button while in the scaler screen will bring you back to the main
screen.However both scalers will still be accumulating counts, so
you can go back and forth between the mainscreen and the scaler
screen and still see meaningful data.
OTHER SWITCHES, BUTTONS, PORTS, DIALSA. On the upper right side
next to the LCD is the LCD contrast dial. As the LCD is used, it
might get to a
point for you to readjust the contrast for it. Not a big deal,
while the backlight is on, gently take a small screw-driver and
turn it to the left or right until it appears to have the best
contrast.
B. Located on the lower left side is the AUDIO output used for
Geiger Bot (with the included G-Bot cable),and for Just plug in the
Geiger Bot cable into this with the 3 conductor plug, and the 4
conductor into youriphone or ipad. It also serves as a mono audio
output for silent listening with headphones, or with any 3
con-ductor to 3 conductor M-M audio cable, you can run sound based
data logging software or amplify the clicking.
C. On the lower right side is the USB power and charge control
switch with status LED. If you want to powerthe GC without using
the batteries- 1. Turn off the GC battery by switching PWR to
middle position. 2. plug in theUSB cable, and other end to any 5v
source such as a wall charger, cigarette adapter, pc, mac or laptop
usb output.3. Flip USB switch to the ON position. To charge the GC-
1. Push PWR switch down to CHARGE position. 2. Pluginto USB source.
3. Push USB switch to the CHARGE position. When you do this, a RED
LED comes on to theright of the USB port and will remain RED till
it is done charging, then the RED LED will become BLUE. During
nor-mal operation with battery, keep this switch (UP) or ON
position.
D. In this same area is the Mini USB FTDI output/input for
programming in Arduino. This also is used tocharge the internal
Lithium Ion battery (with the power switch in the bottome
position.) Or it can be used to powerthe GC for extended periods,
however when you power it this way, I would advise to turn off the
LCD backlight tosave the life of the backlight. Its ok to turn it
on once in a while, but I wouldnt leave it on for extended
periods.When uploading any new changes to the program sketch, you
will need to have the USB PWR switch in the upposition white it is
plugged into your pc with the USB cable. This same USB port is used
for data logging output totwo different usb based FREE Radiation
Logging softwares. Both are PC based and not available for mac.
http://radmon.org/http://radiohobbystore.com/radiation-logger/
SCALER SCREEN
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REMOTE CONTROL SYSTEMThis adds some conveniences such as the
ability to adjust certain things on the GC without the need to plug
into your PC or mac. It is al-
ready setup to work. All you have to do is point the remote
towards the IR window (above the display behind the steel speaker
grill), and push thepower button on the remote to start. As soon as
you do that these options will pop up. Use the channel button to
move thru each option, and usethe volume buttons to move up or down
within those options. You can also use the number pad to input
numbers rather than using the up down ofthe volume. After you reach
the desired amount you push ENT to enter it into the system.
The keys on the SONY Remote Control perform these
functions:GREEN POWER BUTTON enter or exit the menu system. "DISP
PERIOD (MS) is the first prompt you will see.CH + moves to the next
menu optionCH moves to the previous menu optionVOL + increments the
value already set for the current option or toggles an optionVOL
decrements the value already set for the current option or toggles
an optionENT finalizes the entry in the current menu option if
changes were made. When used out of the menu, it acts like the
"null" button to reset the tone.Digits 0-9 for direct entry of
values (instead of Volume or Arrows) must use Enter after using
digits.Decimal Point - enters a decimal point - used when setting
the ratio.Mute used when out of the menu mutes the speaker
MENU OPTIONSInitially, the menu options are set to defaults.
Settings made will be stored in EEPROM on the ATmega328, so they
will be in effect when youpower back on. Pressing and holding the
Select button at power on will reset all menu settings back to
their default settings. Here's a brief de-scription of each menu
option along with its default setting: DISP PERIOD (MS) - The
number of milliseconds before the display refreshes. 5000 (5 sec.)
is a good setting.(Display counts are based on a "running average"
I do not recommend settings of less than 5 seconds.)LOG PERIOD -
Interval to write the CPM, 'dose', and MCU voltage to the serial
output. Default = 1 minute Zero means logging is turned
off.CPM->[DOSE] RATIO - Sets that ratio for the type of GM tube
used. Default = 175.43 CPM and 100 CPM to dose unit (uSv) Note this
ratio will dependon the dose unit being displayed - see DOSE UNIT.
Also note that 2 ratios can be stored. The second ratio can be
selected by the Tube Switch. De-pending on the position of the
switch this menu option will set the value for either the 1st or
2nd ratio. 175.43 is the common default for the SBM-20 and100 for
the LDN 712. The DEC PNT or AV/TV key on the remote can be used to
enter a decimal point.ALARM THRESHOLD - When the CPM or DOSE units
is greater than this value the alarm is triggered. Default = 500
CPM This can be either inCPM or the dose unit selected see ALARM
UNIT. Zero means the alarm is turned off. Unlike using the Select
button, any value may be en-tered. The alarm will stop when
activity drops back under the alarm threshold. You can also silence
the alarm for 30 seconds by pressing the Se-lect button when the
alarm is sounding.DOSE UNIT - Use the arrow keys to select the name
of the unit for the dose value - "uSv/h", "uR/h" or "mR/h". Default
= uSv/hALARM UNIT - Sets whether the alarm is based off of CPM or
the DOSE unit. Use the arrow keys to select. Default = CPMSCALER
PER (MIN) - Sets the period for the second scaler. Default = 10
minutes If scaler period set to "Infinite" (setting below 2) , the
accumu-lated dose rate is displayed on the scaler screen.BARGRAPH
MAX CPM - Sets the CPM that will give a full scale reading on the
bar graph. Default = 1000 CPM Also see the Tone Mode sectionfor how
this option affects tone mode.TONE SENSITIVITY - Determines how
sensitive the tone is to changing activity. Default = 4 Low numbers
are more sensitive. (see below)USE RADLOGGER? - When "Yes" serial
output is compatible with Radiation Logger and RadLog applications.
Default = OFFREG. VOLTAGE - Displays the voltage powering the MCU
(Vcc). To a large degree, this represents the state of the
battery.Note that each menu setting has a minimum and a maximum
setting. Entries that are out of bounds will revert to the minimum
or maximum.
ABOUT DOSE UNITSThe menu allows you select the name of the dose
unit that appears on the display. However, to be clear, there is no
built in conversion betweenthem. Instead the CPM->(unit) is
adjusted depending on the name of the DOSE UNIT selected. For
example, 175.43 is the default set for theSBM-20 with uSv as the
dose unit. Suppose you pick "mR" as the dose unit name, and want to
measure in milirems. ("mR" more correctly abbre-viates as
milliroentgens but is used to save display space.) The rem is
defined as .01 seivert, and 1uSv = 0.1mR. Therefore, to use the
same ratiothat was designed for the tube, you would multiply that
ratio by 10. You would enter a CPM->(unit) as 175.43 x 10 or
1754.3. Likewise if youwanted microrems ("uR") you would divide the
ratio by 10 and enter 17.54.If you do want to use roentgens
("exposure" - used in older instruments) this source states that
they are .96 rem in soft tissue. So the CPM->(unit) for actual
mR would be 175.43 x 10 x .96 or 1684.1. (for uR it would be
16.84)
TONE MODEInstead of the usual 'clicks', tone mode produces tones
that vary in frequency with the current activity - much like a
metal detector. There is alsoan associated "null" button that
resets the scale to the current activity. Tone mode is very
responsive to changes in activity, and the change inpitch is much
more noticeable than a change in the rate of clicks. It was
primarily designed for field surveying. The sensitivity of the tone
mode isset by the TONE SENSITIVITY menu option. Sensitivity refers
to the 'bandwidth' of the tone. When set to low numbers, say 4 (the
default) only asmall increase in activity is needed to produce
higher tones. When dealing with more sensitive GM tubes, decrease
the sensitivity by using avalue of say 8 or 10. Experiment with
values that suit your ear.
The BARGRAPH MAX CPM menu setting also affects tone mode by
defining the CPM that will produce the highest frequency of tone.
Normallythis is set to highest CPM for situation and tube being
used. In order to get the best spectrum of tones, tone mode is
based on a logarithmic pro-gression rather than a linear one. This
fits with the fact that radiation intensity is inversely
proportional to the square of the distance from thesource. The
"null button" resets the range of tones so that the low notes are
set back to the current activity. This is a useful feature when
switchingfrom a low to a high background for instance. The null
button removes the higher background so increased activity may be
more easily discerned.
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SETTING UP TONE MODE1. Set the proper conversion ratio for your
tube. With the proper ratio set, the null point will automatically
be set when the counter is powered onso normal background radiation
is ignored. 2. Place a sample of the mineral or other radioactive
item you are trying to detect approximately oneinch from the
detector. Note the CPM reading after it has stabilized. 3. In the
menu, set the BARGRAPH MAX CPM to the CPM value you notedin step 2.
4. Adjust the tone sensitivity setting to suit your preferences.
For most mildly radioactive items (such as red Fiestaware),
sensitivity set-tings from 1-5 work well. The ideal value varies
depending on the activity level of the target object, the tube, and
the distance. Lower settingscause the tone to increase in frequency
faster in response to smaller changes in the count rate. Higher
settings cause the frequency to increasemuch more slowly for
changes in count rate. When the sensitivity setting is 0, the
frequency will jump very rapidly from the lowest frequency tothe
highest one. This setting is useful to quickly scan an area to
determine if there are hot spots. You will likely want to change
the setting to ahigher number to help locate the hot spot.
LOGGINGLogging is provided in the form of serial output through
the FTDI connector at 9600 baud, N,8,1. The frequency to send the
serial output is deter-mined by the LOG PERIOD menu setting. The
default format has a header on the first line with each line of
data in comma separated values forCPM, Dose. and Vcc. For example,
36,0.2052,4.79 (36 CPM, 0.2052 dose, 4.79V) When USE RADLOGGER? is
set, no header is cre-ated, and only CPM is output. This setting is
used when connecting the serial output to the Radiation Logger
application.
LOGGINGLogging is provided in the form of serial output through
the FTDI connector at 9600 baud, N,8,1. The frequency to send the
serial output is deter-mined by the LOG PERIOD menu setting. The
default format has a header on the first line with each line of
data in comma separated values forCPM, Dose. and Vcc. For example,
36,0.2052,4.79 (36 CPM, 0.2052 dose, 4.79V) When USE RADLOGGER? is
set, no header is cre-ated, and only CPM is output. This setting is
used when connecting the serial output to the Radiation Logger
application.
RADIATION LOGGERThis may be the simplest application to
interface to and provides some very nice features. It's a Windows
freeware application available on thissite. It was originally
intended to work with a clone of the Geiger kit sold there.
Beginning with v10.1 the Geiger kit can interface to this
applicationby setting a menu option USE RADLOGGER? to "Yes" and
setting LOG PERIOD to either 5 or 10 seconds. The application
expects only CPMfrom the serial port in either 5 or 10 second
intervals and combines it with the local time. Setup the parameters
on the logging application by se-lecting the comm port and the baud
- 9600. It does a great job logging and graphing. Logs can be saved
and graphed at a later time. It may bethe best logging and graphing
application I've run into. All that is needed to use it with the
kit is v10.1+ software and a USB to serial dongle.
RADMON.ORGThis is a very unique approach that maps and graphs
the output collected at the PC to a web site. This allows you to
compare your readings withother's around the globe. It is very easy
to get this working with the kit . . . Register and download the
application from radmon.org. Set the menuoptions on the kit to: USE
RADLOGGER? = "Yes" and set LOG PERIOD to at least 30 seconds.
(Unlike the Radiation Logger above, you can setlonger periods if
you wish.) Run the application you downloaded, set the comm port to
your FTDI cable, the baud to 9600, and enter the user-name and
password you registered with. You will also see the kits output on
your PC and also on the radmon.org website.
GEIGER BOT SUGGESTED SETTINGS: (You may have to play with it to
get it just right) GO TO:
https://sites.google.com/site/geigerbot/
SOFTWARE SWITCHESIf you are willing to load the software, modify
it, and upload it, you can set #defines to change certain behavior
or add special features to the pro-gram. In general all the common
features are enabled and you don't have to mess with it. But if,
for example, you want to use a 2x8 LCD, you sim-ply change a
#define, and upload the new release. All user based #defines are
located at the beginning of the sketch and may change based onthe
version. Below is a list of the most interesting defines in the
current version.
EIGHT_CHAR - formats for 2x8 LCD when true DOGM_LCD -DogM LCD
used for display (SPI interface) IR_RC5 - use Phillips RC5 IR
protocol instead of Sony ANALOG_METER - support for analog meter
output - REQUIRES HARDWARE - see this project TONE_POT_ADJ if set,
a 100k pot can be used to set TONE SENSITIVITY instead of the menu
option. SELF_TEST - adds one to each counter every 167ms -
simulates a ~360CPM count
There are step by step instructions on installing the Arduino
IDE and uploading new software.
Select options Select Geiger Counter Select LND712 CS137 Adjust
Conversion factor to your tube:
123 for LND712175 for SBM-20
360 for LND7317Select I/O Settings
Auto Adjust OFF(you may need to play
with this setting) RMS Window 1
Delay Window 30Volume Thresh 20000
Ultrafast Rates ON
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ARDUINO Software and Serial-USB connection information:ON the cd
you will find the FTDI driver and Arduino program version 1.
Install both and restart your mac. Copy the Geiger Sketch folder to
thesame folder as your Arduino program is and remember where that
is as that will be where you go to save your sketch everytime you
make achange to it. There will also be a Library folder that will
also need to be in the same folder. Just remember that the folder
has to be the same exactname as the sketch name is. And also within
Arduino, you will have to go to preferences and show Arduino where
your default sketch folder is.
ARDUINO SETTINGS: Brohogan Software system version 10.3C1. Open
Arduino2. Open the saved sketch .ino file, connect your Geiger
counter to the USB with power switch off.3. Verify the file by
clicking the little check mark icon.4. Click TOOLS, and Select
Board type as Arduino UNO, and select serial port as the top tty
choice.5. Click Serial Monitor (top right looking glass icon). Set
Baud rate to 9600 and you should see the CPM, uSv and geiger
counter voltage data comingup once per minute.For more info go to
website under Software section on the DIY geiger counter website.
Or go to Arduino.ccPLEASE REFER TO THE DIY GEIGER COUNTER
DEVELOPERS WEBSITE FOR FURTHER
INFORMATION:http://www.sites.google.com/site/diygeigercounter/
HARDWARE1. DIY Geiger counter kit V5.3 by Brohogan, Running
operating system 10.32. SBT-11A Geiger Muller Tube (New Old Stock
from Russia)3. Power System by Panasonic, Sparkfun and Pololu
(please charge the unit until the RED light turns BLUE)A. You can
power the Geiger in a couple different ways 1. With internal Lipo
battery2. With PWR switch OFF (middle), USB cable plugged into USB
port on bottom panel of GC then plugged into:
a. Computer or laptop USBb. Wall charger block- This is the
fastest way to charge the battery.c. Standard 5v USB Cigarette
adapter d. To power and operate the unit this way for long periods,
I would suggest to TURN OFF BACKLIGHT to conserve the life of the
LCD.
POWER and OTHER SYSTEM ITEMS: This system is capable of
producing 900+ volts, so be careful or you may get zapped when
han-dling the system while it is powered on.
A. Panasonic Lithium Ion battery - 3.7v 3400mAh Full charge
provides approximately 20 hours constant use of geiger counter with
backlight off. Charge with PC/USB will take about 5 hours or
more.
B. USB Lithium Polymer battery chargerC. Pololu 5V Step-Up
Voltage Regulator U1V10F5 http://www.pololu.com/product/2564D.
Sparkfun 5V FTDI Basic Breakout
LND-712 GEIGER MULLER TUBEInstalled inside the aluminum probe
housing and connected by BNC is an LND712 GM Tube which senses
Alpha, Beta, Gamma and Xray.
http://www.lndinc.com/products/711/
ENCLOSURE: Takachi LCS165H-N Dimensions: 171mm X 85mm X 40mm
REPAIRS:If the unit fails for some reason within 6 months of
purchase, I will bemore than happy to do any maintenance you need
at no charge exceptfor parts and shipping.
PACKAGE CONTENTS:In your package you will find: GK5-K108 Geiger
Counter with silicone boot, Lead Pig w/ Sample, Sony RM-EZ4 Remote
Control, (3) Cables: Geiger bot 3 to 4 conductor, Longand Short
Mini USB to standard USB2. CD with program sketch, photos,
documents, Manual, RAD sticker, and extra faceplate labels. FREE UV
key-chain flashlight with batteries while supplies last.
THE GEIGER KIT IS NOT INTENDED TO GUIDE ACTIONS TO TAKE, OR NOT
TO TAKE, REGARDING EXPOSURE TO RADIATION. THE GEIGER KIT AND IT'S
SOFTWARE ARE FOR EDUCATIONAL PURPOSES ONLY.
DO NOT RELY ON THEM IN HAZARDOUS SITUATIONS!
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daveRADIATION DETECTOR
atomic.
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