A frequencymeter circuit was designed using the AT89C52 microcontroller from the MCS-51 Family.
• LCD display.
• Measures the frequency of signals up to 100kHz.
• The amplitude of the periodic electrical signal whose frequency is to be measured is 5V at most.
• Regardless of the waveform (sine, triangle, sawtooth, etc.) of the periodic electrical signal whose frequency is to be measured, the frequency is measured.
• The clock frequency of the microcontroller system is 12MHz.
• The written program should be compiled and simulated with the Keil-C51 Compiler.
• The drawing and simulation of the frequencymeter designed using the PROTEUS program has been made.
Note: To understand PINs:
1-https://exploreembedded.com/wiki/LCD_16_x_2_Basics
2-AT89C52 Datasheet
3-http://www.learningaboutelectronics.com/Articles/HD44780-LCD-read-write-RW-pin
4-http://www.learningaboutelectronics.com/Articles/HD44780-LCD-register-select-RS-pin
5-http://www.learningaboutelectronics.com/Articles/HD44780-LCD-clock-enable-pin
