Description

This document describes the construction of small frequency counter with a cheap PIC microcontroller and a few seven-segment LED digits.
Automatic range switching with different gate times.
Optional addition or subtraction of a frequency offset (programmable).
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.
Description:
Product Category:tool
Frequency range 1 Hz … 50 MHz
Five digits resolution (display for example x.xxxx kHz, x.xxxx MHz, or xx.xxx MHz)
Very low component count: a PIC 16F628, 5 7-segment LED displays, a 20MHz crystal and a few resistors
Measuring signal amplitude can be up to 30 v
4-40 m passive crystals can measure
Packing list:
1x DIY Kits(DIY kits, not assembled)
1x USB cable
Note:The colors deviation might differ due to different monitor settings.