This is based on onePICSingle-chip frequency meter, with a crystal measurement function and programmable addition and subtraction frequency settings, five digital display, easy and intuitive, all use of in-line components, the circuit is simple and easy to produce.Circuit characteristics: Measurable frequency range 1 Hz -50 MHz (1Hz-50MHz); Can measure the oscillation frequency of most commonly used crystal; Five precision resolution (eg 0.0050 kHz, 4.5765 MHz, 11.059 MHz); Automatic range conversion, without human switching; Programmable addition and subtraction frequency settings for the measurement of radio transceivers and other equipment; You can select the power saving mode, if the frequency is not obvious changes within 15 seconds automatically turn off the display; You can use the universal USB 5V interface power supply, can also use an external DC power supply or 9V battery. The number of components is small, all straight-line components, installation and commissioning simple. PCB size: 80 * 53 mm Single set of weight: 0.034KG 32.768KHZ of the crystal can not be measured, the conditions are limited only to test the 4-20MHZ crystal can be measured, 48MHZ can also be measured, but because this crystal is used 3 harmonic harmonic, 48MHZ crystal measurement will show the fundamental frequency of 16MHZ .It is also possible to input a frequency signal directly between IN and G (ground) for measurement, noting that the measured signal amplitude is not higher than 5V to avoid damage to the IC.||Male+Female 2.1×5.5mm DC Power Plug Jack Adapter Wire Connector for CCTV USD 2 /piece|Solar charging B3603 high precision CNC DC-DC constant voltage current module LED driver module USD 16.88 /piece|Green board 12V\5V full isolation type switch power supply /AC-DC module /220V 5V 12V dual transmission USD 4.6 /piece|4pcs/lot LED Driver DC-DC constant voltage current adjusta
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- DIY Kits RF 1Hz-50MHz Crystal Oscillator Frequency Counter Meter Digital LED
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