Features:
Yellow - This document describes the construction of small frequency counter with a cheap PIC microcontroller and a few seven-segment LED digits. - Frequency range 1 Hz ... 50 MHz - Five digits resolution (display for example x.xxxx kHz, x.xxxx MHz, or xx.xxx 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 (programmable) - Very low component count: a PIC 16F628, 5 7-segment LED displays, a 20MHz crystal and a few resistors - Optional (configurable) power-saving mode which automatically turns - The display off if the frequency didn't change significantly within 15seconds - USB 5V or DC5-12V power supply can be used Package included: 1x DIY Kits(DIY kits, not assembled) 1x USB cable Red Color: Red
SIze: 8 x 5.4cm Suitable For: Crystal measure (4M, 16M crystal) Crystal measure (20M, 11.0592M crystal) Features This is a PIC microcontroller-based frequency meter, subtraction frequency is set with crystal measurement functions and programmable, five digital display, easy and intuitive, all using in-line components, the circuit is simple and easy to make 1. measurable frequency range of 1 Hz -50 MHz (1Hz-50MHz); 2. The most commonly used measure of the oscillation frequency of the crystal; 3. Five-digit precision resolution (eg 0.0050 kHz, 4.5765 MHz, 11.059 MHz); 4. Automatic range conversion, without human handover; 5. Programmable subtraction frequency setting, such as a transceiver for measuring equipment; 6. selectable power saving mode within 15 seconds if there is no significant change in the frequency automatically turn off the display; 7. You can use a common USB 5V interface, power supply, can also use an external DC power supply or 9V battery. 8. A small number of elements, all in-line components, installation is simple. Instruction manual 1. All line elements, PCB printing press to the correct welding, 2. After welding is completed with a standard source input signal, 3. Adjust the yellow adjustable capacitor so that the display is equal to the value of the signal frequency Packing Included: 1 x 1Hz-50MHz frequency meter (DIY kits, not assembled,No Case) Frequency Counter
Use 8 bit Microchip PIC16F648A,up to 1.1GHz
Gate time 0.64 seconds Test sensitivity 1 MHz ~ 10 MHz: superior 60mVpp 10 MHz ~ 60 MHz: superior 60mVpp
60 MHz ~ 1.1 GHz: not tested
3) . Frequency reference 5032 package 13.000 MHz Warming voltage controlled crystal oscillator ( VC - TCXO) , frequency stability is ± 2.5 ppm IF settings The minimum frequency is adjustable in steps of 100 Hz, frequency range 0 ~ 999.9999 MHz, can be set to plus or minus IF mode working voltage DC input: DC 9V ~ 12V working current The backlight is enabled: ≤ 55 mA backlight disabling: ≤ 55 mA Display maximum of 8 digit display physical dimensions Length * width * height: 58mm × 32mm × 27mm Board interface RF INPUT ( measuring signal input ): XH2.54-2P side outlet port ICSP INPUT (MCU programming interface ): XH2.54-6P pins
POWER INPUT ( Power Interface ): XH2.54-2P side outlet port
Package included:
1 x Frequency Counter Tester Measurement For Ham Radio Package includes: 1MHz-1.1GHz 1Hz-50MHz Crystal Oscillator Tester Frequency Counter Meter DIY Kits
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