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 ...

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 ...

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 ...

Here is the circuit for the Sparkfun Active Low style sensor. PIR Pin “+” connects to Arduino +5 one side of the 10K Resistor Connects ... flash the on-board LED in front of digital pin ...

Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting resistor and the all-important buzzer. We like how [newsonator] wired up the LEDs to the Arduino by ...

All you have to do is tap into the ground and tail light (not brake light) wire if that’s where you’re adding the LED. Add the resistor across the circuit, which adds a load (resistance) to the ...

The output voltage increases until the current through the LEDs reaches the value ... or if one load is shorted. The circuit contains one bipolar transistor and resistor per string, a voltage ...

These drive circuits must be capable of operating from a loosely regulated power rail, and also be both cost and space effective. To maintain their long operating life, it is imperative that an LED’s ...