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Getting Started With Electronics Build your own parking sensor Built a parking sensor using only a few components and a few lines of code.
This is what you need: Arduino Ultrasonic sensor Buzzer The Arduino is the control unit. It reads distance measurements from the ultrasonic sensor, and makes sound with the buzzer to indicate how far you are from an obstacle.
Interested in robotics ? Lets make cool projects!
Adjust the brightness of an LED Change the resistor value To change the brightness by adjusting the resistor value, add a potentiometer in series with the LED. When you adjust the knob of the resistor, the brightness of the LED will change. Turn it on and off fast Turn the LED on and off fast. Maybe a few hundred times per second. Usually you want to use a microcontroller for this. By adjusting the percentage the LED is on versus off, the brightness changes.