RANCANG BANGUN TIME-COUNTER SPEKTROMETER NUKLIR BERBASIS MIKROKONTROLER AT89S51

Abstract

It has been designed and built one Time-Counter Nuclear Spectrometer Based Microcontroller AT89s51 for nuclear spectrometer system. Time-Counter chopping many functions pulse output from the SCA. The maximum amount of chopped pulses that can be displayed is 65,535. Time-counter-based microcontroller made to determine the amount of energy and intensity of the spectrometer energy nuclear radioactive. Time-counter that is generated consists of four main series microcontroller circuit as a census taker, astable multivibrator circuit as the timing, sequence viewer to seven segments and the frequency divider circuit to divide the pulse frequency. SCA output pulse will be chopped by the microcontroller, and serves as astable multivibrator timer prescaler made in the program. Because the maximum amount that can be chopped as many as 65,535 displayed, then made 10 and 100 distributors as a replacement for seven-segment digits. From the results of testing using signal generators and frequency counters to get the timing system has a level of accuracy of (0.097000±0.000085)kHz deviation of 0.088%. In the test system has a level of accuracy enumerating each at a frequency of 100Hz is(100.64±0.18)Hz with a deviation of 0.182%, at a frequency of 1000Hz is (1000.07±0.30)Hz with a deviation of 0.03% and at a frequency of 4kHz is (4017.50 ±0.13)Hz with a deviation of 0.0033%. Enumeration system has a percentage of the deviation of actual results of 1.81%.