Frequency counter 400Hz to 50MHz with PIC 16F84

  
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It consists only from Microchip PIC 16F84 cpu and LCD text module. Author states that this counter is capable metering frequencies from 400Hz to 50MHz. I used faster, 20MHz version of 16F84A-20I/P, and it managed to count 80MHz oscillator output.
Frequency counter 400Hz to 50MHz with PIC 16F84 - schematic



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