1Hz-50MHz Digital Crystal Oscillator Tester Frequency

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Description:

This document describes the construction of small frequency counter with a cheap PIC and seven-segment LED digits.
Frequency Hz ... 50 MHz
Five digits resolution (display for example x.x , x.x MHz,
or xx. MHz)
Measuring signal amplitude can be up to 30 v
4-40 m passive crystals can measure
Automatic range switching with different gate times
Optional addition or subtraction of a frequency offset ()
Very low component count: a PIC 16F628, 5 7-segment LED displays, a 20MHz crystal and resistors
Optional (configurable) power-saving which automatically turns
If the frequency does not change significantly within 15 seconds, the display turns off
Can use USB 5V or -12V

Package Includes:

1x DIY
1 x USB Cable

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