Flashing Alarm In this project we will build a flashing alarm using a buzzer block and an LED block. We will also use a non-blocking way to control flashing of LED and buzzer instead of using delay() function which blocks the execution of entire sketch. There are two types of buzzers, an active buzzer and […]
Rainbow Light In previous projects, we have used different colored LEDs like red, green and blue and controlled their luminescence with microcontrollers. In this project we will see how can we produce these colors along with many others from a single LED. An LED is made from a semi conductor material. When an electric current
Traffic Lights With a single LED blinking, it is easy to increase the number of LED to blink in any sequence or order. In this project, we will use two LED blocks, red & green, to create a traffic lights. In this project, we need to synchronize the switching of LEDs to make sure when
Car parking sensor detects the distance between car and the obstacles around it. A buzzer beeps faster or slower depending on whether the car is close or away from the obstacle to provide perception to the driver. We can design a similar system using a ultrasonic range sensor and an active buzzer. Ultrasonic range sensor
In an access-controlled parking area, there needs to be a boom gate to allow cars in the parking area to exit out but prevent unauthorised entry from outside. This gate detects presence of a car at the gate and opens the gate for it to go out. However, this gate remains closed and does not
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Musical Tunes In this project we are going to combine art of music with technology. We will utilize a microcontroller to create musical symphony and play it on a speaker. Music is a combination and sequence of different musical notes. A musical note is a simply a sinusoidal wave with certain frequency. For example, the
Auto Sensing Light with LED Ring This project is an enhancement to the auto sensing light project built with a photoresistor and an LED block. In this project we are going to use an addressable LED ring instead of a single LED block The LED ring we are using is called WS2812b which consists of
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Police Lights With the understanding of controlling LED with microcontroller and use of push button as input, we will create police lights. The police lights use flashes of red and flashes of blue in a continuous fashion. We will make a few modes of flashing sequences in this project and keep cycling through these modes.
