Here is the circuit of an Arduino-based Panic Alarm! The wiring is very simple so that even a novice can construct this interesting circuit without any difficulty. Arduino is a family of ...

DO NOT connect in any ways the main power supply that drive the LOAD to the arduino and transistor circuitry! You can use this code example to introduce a delay in your circuit. The variable “stayON” ...

Author Jim Walker describes a very low cost analog delay line circuit using parts such as the LM311 comparator and 74HC74 D flip-flop The concept of an audio delay line is simple. The voice or ...