This project uses OpenCV in Java to detect human faces using a webcam. When a face is detected, it sends a signal via Serial Communication using jSerialComm to an Arduino, which activates a buzzer (or ...

Arduino Countdown Timer This project is a simple Arduino countdown timer that uses a knob to set the time and buttons to adjust the countdown. It also includes a buzzer and LED lights for feedback. I ...

The programmable timer features and up counter, down counter, and point accumulator that can be programmed manually using only one on-board button, or digitally with your Arduino or Raspberry Pi.

The project is aimed at Arduino-based circuits, but any chip with an ADC will work. The 555 timer is used as a free running oscillator.

Runner and Arduino enthusiast Nikodem Bartnik has created a DIY 100m sprint timer which is placed at the finish line and signals the start of timing via an audible bleep from its integrated ...