World of Arduino

  • Water Level Sensor
    We tried the water level sensor today and using a RGB to indicate different water level, let us show you how to do this. How does water level sensor work When we use the water level sensor, we need to connect to 5V, GND and Signal to the … Continue reading Water Level Sensor
  • 7 Segment DEC & HEX counter
    This is our second Arduino project, using 4 piece 7-segment LED display to create a DEC / HEX counter which can support both common anode and common cathode components. 7 Segment Display See the photo for how we connect the 7 segment display, you need to connect a … Continue reading 7 Segment DEC & HEX counter
  • Anode vs Cathode
    When you deal with diode or transistor components such as LED, 7 Segment display, RGB LED, etc., you need to understand whether the component is common anode or common cathode, it will give you completely different result. 7 Segment Display Let’s us the 7 Segment display as example. … Continue reading Anode vs Cathode
  • RGB LED
    R – Red, G – Green, B – Blue, basic display component to display color. We call this as one pixel for all display unit, such as monitor, TV and smart phone. It contains three inputs for red, green and blue, as well as a common ground(1). When … Continue reading RGB LED
  • Our First PCBA
    After we learnt some basic idea about the Arduino UNO board and basic LED circuitry, we started to build our first project – LED array. But, keep in mind, always put loading (i.e. resistor) for LED. Otherwise, you will burn it or even damaged the board. We built … Continue reading Our First PCBA