3Pcs Original Hiland 1Hz-50MHz Five LED Display Frequency Counter With Frequency Oscillator Kit

Description This is a Frequency Counter based on PIC microcontroller add and subtract with crystal vibration measurement functions and programmable frequency Settings five digital tube display convenient and intuitive easy to makeFeature Measured frequency range 1 hz to 50 MHZ 1HZ to 50 MHZ Can measure most commonly used crystals of oscillation frequency from 4mhz to 50mHzFive precision resolution e g 0 0050 KHZ 0 0050 MHZ 11 059 MHZAutomatic range switching do not need to switchProgrammable Settings add and subtract frequency used for measuring the transceiver and other equipmentOptional power saving mode did not change significantly within 15 seconds if frequency display will be automatically closedCan use generic USB interface power supply also can use an external power supply or 9V batteryElement number less all into components simple installation and debuggingHere is the circuit diagram Package included 3 x Frequency Counter KitTest photos for reference only It is also possible to directly input a frequency signal between IN and G ground for measurement Note that the amplitude of the measurement signal should not be higher than 5V to avoid damage the IC The following figure shows the input 1Hz and 10KHz