Poly(3,4-ethylenedioxythiophene) (PEDOT) was electrochemically polymerized to in situ modify stainless steel (SS) plate electrode to improve its microbial bioelectrocatalytic activity as ...

This is an Arduino-based distance detection system using an HC-SR04 ultrasonic sensor. When an object comes within 100 cm, the system activates a buzzer with random tones and lights up an LED.