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 ...

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 ...

Now, however, [Jose] has come up with an LED candle that solves all of these problems. (Original link to the project in Spanish.) The heart of the project is an Arduino Pro Mini, which is ...

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 ...