1Hz-50MHz frequency meter crystal volume measurement frequency measurement five-digit tube display DIY kit

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This is a kind ofPICThe frequency meter of the single -chip microcomputer has a crystal vibration measurement function and a programmable addition and subtraction frequency settings. The five -digit digital tube is displayed, which is convenient and intuitive. All direct -inserted elements are used. The circuit is simple and easy to make.

Circuit characteristics:

• A measurement frequency range 1hz-50 Mzhz (1Hz-50MHz);
• The oscillation frequency of most commonly used crystal can be measured;
• Five accuracy resolution (such as 0.0050 kgm, 4.5765 trillion, 11.059 MM);
• Automatic volume conversion, no artificial switching;
• Programmable addition and subtraction frequency settings are used to measure radio transceiver and other equipment;
• You can choose a power -saving mode. If the frequency does not change significantly within 15 seconds, the display is automatically closed automatically;
• You can use the general USB 5V interface power supply, or you can use an external DC power supply or 9V battery.
• The number of components is small, all of the components are inserted, and the installation and debugging are simple.
• PCB size: 80*53 mm
• Single set of weight: 0.034kg

32.768kHz's crystal can not be measured. The conditions of limited conditions can only be measured by 4-20MHz crystal, and 48MHz can also be measured, but because this crystal uses a 3x frequency harmonic, 48MHz crystal measurement shows that the base wave frequency will be 16MHz 16MHzEssenceYou can also directly enter the frequency signal between IN and G (ground) to measure. Pay attention that the amplitude of the measurement signal should not be higher than 5V to avoid damage to IC.