This is DIY Geiger SD Logger project based on Arduino IDE. The kit includes main board with 16x2 LCD and SD Logger Shield. The link to download source files will be sent to a buyer with the package. The Arduino sketch is written for Arduino IDE 1.06 and it easy to modify if you have some experience with the IDE.

SD Shield has SMT parts that require good soldering skills! Atmega microcontroller comes with Arduino IDE bootloader, but you need to upload supplied sketches by yourself.

The kit has basic simple functions to count GM tube events (CPM), calculate gamma radiation DER for ambient background level or for low-moderate radioactive samples and to write the data on SD card. Since it's educational Arduino IDE project, do not rely on its readings in real hazardous situations!

SD Shield has RTC circuit (real time clock), 3.3V level shifter for SD card, Buzzer and micro SD socket. Support connection of Adafruit GPS module or UART logging through RX TX pins. Files on SD card contains CPM readings for each data point, your local date and time, nmea geographical data and total absorbed dose. 450V high voltage for GM Tube produced with PWM. You can set it through software calibration of PWM. For each Geiger event the kit produces clicker sound similar to a “classic” Geiger counter sound.

Note: Geiger Tube, Enclosure, uSD Card, Batteries and TTL Module are not included in the purchase! This kit requires good soldering skills, TTL module for uploading firmware and ability to use Arduino IDE.

Technical specifications:

• Geiger Tube Compatibility: GM Tubes with anode voltage 350-480V
• Arduino IDE compatible
• LCD 16x2 HD44780
• Two tact buttons for controlling the software
• Moving Average calculating algorithm
• Display dose rate in uSv/h or uRn/h units
• UART logging with "Radiation Logger", require USB-TTL dongle
• Adafruit GPS module support
• SD Shield Board with RTC
• Absorbed dose, CPM, NMEA logging
• Smart Backlight Control
• Fast Bargraph on LCD
• Clicker Geiger Sound, Buzzer installed on Shield PCB
• Low Battery Indicator
• Clock 24 hours format
• Supply Voltage: 5V DC or Battery
• Supply Current: 25mA without backlight
• Dimensions: 81(L) x 37(W) x 50(H) mm
• UPC Number: 634654895714
• SKU: RH-K-GK-1-L

Full Parts List:

Main Board include:

1x High Quality Manufactured PCB

1x Atmega-328 Preprogrammed Microcontroller

1x LCD Module 16x2 Green Color

1x 100R ohm Resistor

1x 220R ohm Resistor

2x 1K ohm Resistor

3x 10K ohm Resistor

1x 4.7M ohm Resistor

1x 10K Potentiometer

1x 1K Potentiometer

4x 100nF Ceramic Capacitor

1x 300pF Ceramic Capacitor

2x 22pF Ceramic Capacitor

1x 10nF 1000V Ceramic Capacitor

3x 100uF Electrolytic Capacitor

1x 1N4937 Diode

1x LED 3mm

1x MPSA44 High Voltage Transistor

2x 2N3904 Transistor

1x 100uH Axial Inductor

1x 10mH Radial Inductor

1x 16.000 MHz Crystal

1x 28 Pin IC Socket

1x Slide Switch On/Off

2x Tact Switch Side Right Angle

1x Terminal Block

1x Battery Connector Set

2x 6 Pin Female Header

1x 6 Pin Male Header Right Angle

2x 6 Pin Male Header Long

2x Standoffs for LCD

4x Screws for LCD

SD Shield Include:

1x High Quality Manufactured PCB

2x 2.2K Resistor SMD 1206

1x 10K Resistor SMD 1206

3x 100nF Capacitor SMD 1206

1x 10uF Capacitor SMD Tantalum

1x 100uF Electrolytic Capacitor

1x BC847 Transistor SMD SOT-23

1x LM1117 3.3V Regulator SMD SOT-223

1x DS1307 RTC SMD SOIC 8

1x 74HC4050 SMD SOIC 16

1x 32.768KHz Crystal

1x Micro SD Socket SMT

1x CR1220 Socket

2x 3 Pin Female Header Connector

1x 4 Pin Female Header Connector

1x 6 Pin Female Header Connector

1x Piezo Buzzer

1x Jumper Cup

4x Standoff for PCB

4x Screws for PCB