Hitachi’s HD44780 based 16×2 character LCD are very cheap and widely available, and is an essential part for any project that displays information. Using the LCD backpack, desired data can be ...

This frequency counter design uses 2 pushbuttons that are connected to analog comparators to read their states. Figure 3 Completed frequency counter in 3D printed enclosure with LCD.

Computer engineer Thiery Guennou based in France has created a new Arduino compatible precision frequency counter 5 or 120 MHz. The inspiration behind the Arduino board was to build an open, very ...

This isn’t the first home-made frequency counter we’ve featured. We’ve seen more than one Arduino-based counter, one based on 74 logic, and a PIC based counter with a serial output.