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A microprocessor based frequency counter up to 70MHz

Features:

The software supports the following operations modes:

• Usage with no prescaler, input frequency up to 70MHz, 10Hz resolution 
• Usage with :64 prescaler, range depending on prescaler, corrected reading in MHz, 1kHz resolution
• Usage with :128 prescaler, range depending on prescaler, corrected reading in MHz, 1kHz resolution
• Usage with :640 prescaler, range depending on prescaler, corrected reading in GHz; 10kHz resolution
• Usage with :1000 prescaler, range depending on prescaler, corrected reading in GHz, 10kHz resolution

Software (version 1.1 is now available):

• Download the source code in C
• Download the compiled .hex file for direct programming of the processor

Schematic:

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