Messing around with Arduino ... at all (LEDs won't light up or will be too dim, etc). Too much and things probably won't work right and also might short out and create a fire risk. Resistor ...

The LED segments of the display require current-limiting resistors when powered from a 5 V logic pin. The value of the resistor ... basic wiring diagram of the current limiting resistors and driver ...

const int ledPin = 9; // Test LED wire to D9 void setup ... The wiper of the 10K potentiometer is wired to A0 of Arduino (5V-A0-GND), while anode (A) of the test LED is linked to D5 through a ...

So sensitive in fact, that a resistor of a ... would trigger off its own LEDs and buzzer, trapping itself in a never-ending loop. [Mirko] solved this by encasing the Arduino inside a closed ...