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51 single chip microcomputer AC voltmeter
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AC voltmeter based on STC89C52 single chip microcomputer, AC measurement range 0-500v & nbsp; & nbsp; & nbsp; measurement accuracy 5% & nbsp; & nbsp; & nbsp; over range sound and light alarm & nbsp; PC string & nbsp; communication & nbsp; & nbsp; & nbsp; range automatic switching circuit: complete signal range selection and decimal point selection.
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Single chip recorder
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Using a recorder designed by STC89C51 single chip microcomputer and isd1820 chip, we can record and play by ourselves,
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Automatic range switching DC voltmeter based on STC single chip microcomputer
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STC89C52 / 51 single chip microcomputer is used as the main control chip, 3 and 1 / 2 DC digital voltmeter is used to realize automatic range switching and serial output of voltage value. DC voltage value of test load: 1v-100vdc; measuring gear: 0-2v, 0-200v, 0-500v.
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Arduino non contact infrared temperature measurement
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Arduino development board, mlx90614esp non-contact infrared temperature sensor, LCD display temperature, and can upload data to onenet platform for display
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Single chip microcomputer pH concentration measuring instrument
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The pH concentration meter based on stc15 MCU, digital tube display concentration value, can calibrate the concentration and sensor
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