1Hz-50MHz crystal oscillator measurement frequency meter kit

This is a frequency meter based on PIC single-chip microcomputer, with crystal oscillator measurement function and programmable addition and subtraction frequency setting, five-digit digital tube display, convenient and intuitive, all use in-line components, simple circuit, easy to make. Product parameters: Product name: PIC microcontroller frequency meter production kit Product model: TJ-56-541 PCB size: 64*49mm Shell size: 72*64*13mm Single set weight: 0.034KG Material: FR4 acrylic Power supply voltage: 6.8~12V Features: 1. The measurable frequency range is 1Hz-50MHz, and the minimum voltage is 5V (1Hz-50MHz); 2. It can measure the oscillation frequency of most commonly used crystal oscillators; 3. Five-bit precision resolution (eg 0.0050 kHz, 4.5765 MHz, 11.059 MHz); 4. Automatic range conversion without manual switching; 5. Programmable addition and subtraction frequency settings, used to measure equipment such as radio transceivers; 6. The power saving mode can be selected, if the frequency does not change significantly within 15 seconds, it will automatically turn off the display; 7. The universal USB5V interface can be used for power supply, and an external DC power supply or 9V battery can also be used. 8. The number of components is small, all in-line components, easy to install and debug. Debugging steps: 1. After soldering on the IC, single chip microcomputer PIC16F628A, pay attention to the direction of the IC, inserting may damage the chip! 2. Check whether the IC is reversed, and if so, please correct it in time. 3. After the inspection is completed and the power is turned on, the fourth digital tube will display 0. Indicates that the installation was successful. Steps for usage: 1. Before measuring the signal, please insert the j1 jumper cap. The blue terminal is IN, which is used for signal input. GND is connected to the GND signal. The input signal amplitude cannot be higher than 30V, otherwise the microcontroller and other components may be damaged. 2. Before measuring the crystal, please insert the j1 jumper cap. The crystal oscillator from 4M to 20M can be measured, and the 40M crystal oscillator can also be measured.