In the circuit diagram the LED and buzzer are connected in parallel. If your LED is working but not the buzzer the problem could be. 1. You mis-matched the polarity of the Buzzer. Buzzers have ...

Take a permanent marker and make a rough layout or path draw on your PCB as shown in figure 1. Fig. 1: Layout or path draw of the PCB Fig.2: Laser Light Circuit Fig. 3: Schematic Circuit diagram of ...

In this project, we are going to make a door alarm system using the ultrasonic HC-SR04sensor The ultrasonic sensor used in this project is used as a distance sensor, it will tell us the distance at ...

Basic Traffic Light System Refer to the circuit diagram (basic-circuit.png) to wire your components: Use RGB LEDs for car and pedestrian lights. ... For the advanced system, check the request LED, ...