Messing around with Arduino can lead to some ... controlling the current in an electrical circuit. This is particularly important if your project uses LEDs, or is complex enough to otherwise ...

Here is a simple, yet useful circuit of an Arduino 4-digit 7-segment LED display unit. The module used here is ... resistors when powered from a 5 V logic pin. The value of the resistor is typically ...

This is a simple 0 to 9 counter circuit constructed using Arduino! Here, a common cathode 7-segment LED display is connected to Arduino ... For testing purpose only one 330 Ohm resistor (R2) is added ...

It is a pretty common first project to use an Arduino ... resistor also has to have a sufficient view of the LED. You might use this as a safety light that only works in the dark. A simple circuit ...