Introduced a single chip AT89C2051 frequency as the core of intelligent design, the use of single-chip internal timer (count) device under test signals completed cycle (frequency) measurements. The system signal pre-processing circuit, control circuit and display circuit three most studied, using RS232 interface circuit, the use of VB6 programming language to achieve a PC serial port to receive machine control procedures.

MCU-basedsystemforintelligentfrequencymeter.pdf

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