1Hz to 10MHz frequency meter using ATtiny2313

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This AVR-based Frequency Meter is capable of measuring frequencies from 1Hz to 10MHz with 1 Hz resolution. The hardware of this project consists of seven 7-segment displays, AVR ATtiny2313 uController, and a few transistors and resistors. The AVR counts input pulses for a precise 1 second interval (generated using the built-in Timer) and displays the result on the multiplexed seven segment LED displays. [via]

1Hz to 10MHz frequency meter using ATtiny2313 – [Link]

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