Development of multichannel analyzer using sound card ADC for nuclear spectroscopy system AIP Conference Proceedings 1584, 50 (2014) Abstract. This paper presents the design of new digital radiation survey meter with LND7121 Geiger Muller tube detector and Atmega328P microcontroller. Development of the survey meter prototype is carried out on Arduino Uno platform. 16-bit Timer1 on the microcontroller is utilized as external pulse counter to produce count per second or CPS measurement. Conversion from CPS to dose rate technique is also performed by Arduino to display results in micro Sievert per hour (μSvhr -1 ). Conversion factor (CF) value for conversion of CPM to μSvhr -1 determined from manufacturer data sheet is compared with CF obtained from calibration procedure. The survey meter measurement results are found to be linear for dose rates below 3500 μSv/hr.

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Geiger Mueller tube is a longstanding device to detect gamma ray in it range and it still preferred in many radiation detection devices due to robustness in rough environment. The high voltage supply to support Geiger Mueller activation needs a transformer at in order to operate. This paper will discuss the effectiveness of the transformer to get satisfactory and stable high voltage. The transformers were winded manually in few sets with limited size of the bobbin and ferrite core. The transformers were applied into three different circuits to analyse the high voltage. The result of the effectiveness of the transformer and the high voltage of the circuit were discussed.