K112 Geiger Pal This is a one of a kind custom hand-made Geiger Counter built by

Atomic.Dave. It is based on a kit designed by Username: Brohogan. For 3years, I have built and sold about 120 of these kits, with very good results,and fantastic feedback by ebay customers. All information for this kit isavailable at the developers website. As I have said before, this is more of akit for someone who knows a little bit about electronics but doesnt have thetime or patience to build it, or would rather someone else do all the dirtywork. Having been built by me, of course there will be some imperfections,although as minimal as possible. These instructions will help you tounderstand the basic operation of this meter. Once you have used it a coupletimes, it should be pretty easy for you to operate.

OPERATIONOn the face of the unit are 2 LEDS, 1 GREEN momentary button, and 2triple pole slide switches. Follow the label to locate the listed switchesbelow: LEDSAfter powering the GC on, you will hear the beeping of the piezo as yourSBT-9 GM tube picks up radiation events. The GREEN LED is for radiationevents and coincides with the beeping piezo which can be muted with themute switch. The RED LED will only light up when a set alarm threshold isreached. The piezo for events is located beneath the trefoil under the labeland the piezo for the alarm is located on the top of the unit next to the IRwindow for the newly added remote control feature of this unit.

Switches:1. SELECT Green momentary switch. When you first power on the unit, youwill see this first screen:

GEIGER-

PAL 11.1

This customized first welcome window can be changed, by doing a littleprogramming in Arduino. The second line refers to the kit brohogan softwareversion 11.1. Refer to the DIY site for more info at the SOFTWARE section.The second window will show this:

85 Rate

5.25V

The first line refers to the conversion rate of CPM to uSv/hr for the SBT-9 tube (85) this can be changed with the remote, or in the program sketch,with Arduino which I will explain later. The second line refers to the currentvoltage that your system is running at. This is a 5 volt system. (2) AAbatteries are boosted to 5v with a Up/down regulator. However, this unit isunique in that you can install higher voltage AA size batteries such as (2)3.7v Lipos. As long as you stay under 9 volts. IMPORTANT- MAKE SUREYOU PUT THE BATTERIES IN ACCORDING TO THE INDICATED + AND IN THE BATTERY COMPARTMENT.You can use Alkaline, or nimhrechargeables. Everytime you start up your GC (geiger counter) it will showyou this so you will always know your current voltage. The third window willshow something like this:

Alarm ?

Now 200At this point, you can hold down the SELECT button to incrementally

change the Alarm threshold number. Once you stop holding the button andwait, it will be set to the current number shown on the screen and will staythere until you change it by restarting and repeating the same procedure. You

can also chose from units of measurement such as CPM or uSv/h for theAlarm with Arduino.

The final screen will say:??? c/m Then it starts counting with the first line being the Counts Per Minute

(CPM) and the second line being uSv/hr. Both numbers are continuouslyaveraged with it going back to 0 during pauses under a minute.

This same button is used for changing the display from standard modeto scaler mode. It has two preset timed functions, one for each line. 1 minuteand 10 minute averaging. The 1 minute first timer is set and cannot bechanged, but the second one can be changed with the remote (more on thatlater) or in Arduino to whatever time you wish to set it up to 90 minutes. Itworks like a stopwatch starting as soon as you hit the button. The timecounts down on the right side of the screen in seconds. Until each amount isreached, both lines act as total counters. During this time, you will see a C onthe left side of each line until that time is reached. Once it is reached, theaveraged count is displayed.2. POWER controls the units event LED and power. Left is meter on withoutLED. Middle is OFF, and Right is meter on with LED on.3. SOUND The Sound switch controls the Event piezo and the Alarm piezo.Middle turns off both. Right turns both on. Left turns on only the Event piezo.The Red LED will go off even if the alarm piezo is in off position. This isknown as a visual silent alarm.

OTHER SWITCHES, BUTTONS, PORTS, DIALSA. On the upper right side of the unit, 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 abig deal, while the backlight is on, gently take a small screwdriver and turn itto the left or right until it appears to have the best contrast.

B. Located on the left side of the unit is the AUDIO output multi-portused for Geiger Bot (with the included G-Bot cable) Just plug in the GeigerBot 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 withheadphones, or with a 3 conductor to 3 conductor M-M audio cable, you canrun sound based data logging software or amplify the clicking.

C. On the right side of the meter is the Mini USB FTDI output/input forprogramming in Arduino. This is also used to power the GC for extendedperiods, however when you power it this way, it is very IMPORTANT to take outthe batteries first. When uploading any new changes to the program sketch,this switch can be in any position while you are connected to your pc with theUSB cable. This same USB is also used as an output for usb based FREERadiation Logging softwares. To use these softwares, you must download fromtheir sites, and install on your laptop or PC. Both are not available for Mac. Thecd has the software in zipped format for easy download.

http://radmon.org/download.shtml http://radiohobbystore.com/radiation-logger/

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 alreadysetup 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 the power buttonon the remote to start. As soon as you do that these options will pop up. Usethe channel button to move thru each option, and use the volume buttons tomove up or down within those options. You can also use the number pad toinput numbers rather than using the up down of the volume. After you reachthe 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 anoptionVOL decrements the value already set for the current option or togglesan 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) mustuse 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 inEEPROM on the ATmega328, so they will be in effect when you power backon. Pressing and holding the Select button at power on will reset all menusettings back to their default settings. Here's a brief description of each menuoption along with its default setting: DISP PERIOD (MS) - The number of milliseconds before the display re-freshes. 5000 (5 sec.) is a good setting.(Display counts are based on a "running average" I do not recommend set-tings of less than 5 seconds.)LOG PERIOD - Interval to write the CPM, 'dose', and MCU voltage to the se-rial 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 ratioscan 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 foreither 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 beused to enter a decimal point.ALARM THRESHOLD - When the CPM or DOSE units is greater than thisvalue the alarm is triggered. Default = 500 CPM This can be either in CPM orthe dose unit selected see ALARM UNIT. Zero means the alarm is turnedoff. Unlike using the Select button, any value may be entered. The alarm willstop when activity drops back under the alarm threshold. You can also si-lence the alarm for 30 seconds by pressing the Select button when the alarmis sounding.DOSE UNIT - Use the arrow keys to select the name of the unit for the dosevalue - "uSv/h", "uR/h" or "mR/h". Default = uSv/hALARM UNIT - Sets whether the alarm is based off of CPM or the DOSEunit. Use the arrow keys to select. Default = CPMSCALER PER (MIN) - Sets the period for the second scaler. Default = 10minutes If scaler period set to "Infinite" (setting below 2) , the accumulateddose rate is displayed on the scaler screen.BARGRAPH MAX CPM - Sets the CPM that will give a full scale reading onthe bar graph. Default = 1000 CPM Also see the Tone Mode section for howthis option affects tone mode.USE RADLOGGER? - When "Yes" serial output is compatible with Radia-tion Logger and RadLog applications. Default = OFFTONE SENSITIVITY - Determines how sensitive the tone is to changing ac-tivity. Default = 4 Low numbers are more sensitive. (see below)REG. 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. Entriesthat are out of bounds will revert to the minimum or maximum.

ABOUT DOSE UNITS:The 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->[DOSE] RATIO is adjusted depending on the nameof 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 unitname, and want to measure in milirems. ("mR" more correctly abbreviates asmilliroentgens but is used to save display space.) The rem is defined as .01seivert. Therefore, to use the same ratio that was designed for the tube, youwould multiply that ratio by 10. You would enter a CPM->[DOSE] RATIO as175.43 x 10 or 1754.3. Likewise if you wanted microrems ("uR") you woulddivide the ratio by 10 and enter 17.54. If you do want to use roentgens (usedin older instruments) this source states that they are .96 rem in soft tissue.So the CPM->[DOSE] RATIO for actual mR would be 175.43 x 10 x .96 or1684.1. (for uR it would be 16.84)

PLEASE REFER TO THE DIY GEIGER COUNTER DEVELOPERSWEBSITE FOR FURTHER INFORMATION:http://www.sites.google.com/site/diygeigercounter/

ARDUINO Software and Serial-USB connection information:ON the cd you will find the FTDI driver and Arduino. Install both and restartyour mac. Copy the Geiger Sketch folder to the same folder as your Arduinoprogram is and remember where that is as that will be where you go to saveyour sketch everytime you make a change to it. There will also be a Libraryfolder that will also need to be in the same folder. Just remember that thefolder has to be the same exact name as the sketch name is. And also withinArduino, you will have to go to preferences and show Arduino where yourdefault sketch folder is.

ARDUINO SETTINGS: Brohogan Software system version 10.31. Open Arduino2. Open the saved sketch .ino file, connect your Geiger counter to the USBwith 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 serialport as the top tty choice.

5. Click Serial Monitor (top right looking glass icon). Set Baud rate to 9600and you should see the CPM, uSv and geiger counter voltage datacoming up once per minute.

For more info go to website under Software section on the DIY geigercounter website. Or go to Arduino.ccOTHER SOFTWARE LINKS:http://www.blackcatsystems.com/GM/download.html

HARDWARE1. DIY Geiger counter kit V3.0 by Brohogan, Running operating system 10.32. SBT-9 Russian New Old Stock Geiger Muller Tube

POWERING YOUR GEIGER COUNTERYou can power the Geiger in a couple different ways 1. With internal AA batteries, Alkaline or Nimh rechargeables.2. With PWR switch in any position, USB cable plugged into USB port thenplugged into:

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

GEIGER BOT SUGGESTED SETTINGS: (You may have to play with it to get it just right) GO TO: https://sites.google.com/site/geigerbot/

SBT-9Voltage of start of counting = 260...320V Working voltage = 380V Length of flat part of counting curve = 80V Slope of flat part of counting curve = 0.125 %/V Background noise at 25 OC = 0.15 pulses/sec Working temperature = -45...+50 OC Life = 1*1010 pulses Weight = ~8.5 g Diametr = 10mm Length = 73mm

a. Computer or laptop USBb. Wall charger blockc. Standard 5v USB Cigarette adapter

POWER and OTHER SYSTEM ITEMS: This system is capable ofproducing 900+ volts, so be careful or you may get zapped whenhandling the system while it is powered on.A. Sparkfun Lithium Ion battery - 3.7v 1300mAh

Full charge provides approximately 20 hours constant use of geigercounter with backlight off.

B. USB Lithium Polymer battery chargerC. Pololu 5V Step-Up Voltage Regulator U1V10F5http://www.pololu.com/product/2564D. Sparkfun 5V FTDI Basic Breakout

ENCLOSURE: Serpac H67AADimensions: 4.940 in X 2.750 in X 1.275 inhttp://www.serpac.com/h67.aspx

REPAIRS:If the unit fails for some reason within 6 months of purchase, I will be morethan happy to do any maintenance you need at no charge except for partsand shipping.

PACKAGE CONTENTS:In your package you will find: Geiger Counter & Probe, (2) Cables: Geigerbot 3 to 4 conductor, Mini USB to standard USB2. Wall and Car USBchargers. CD with software and documents, Manual, RAD sticker, and extrafaceplate labels.

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