Recently I brushed up my knowledge on LED ... upload the following PWM sketch to your Arduino Uno r3/Nano v3 and connect a 10mm water-clear green LED to D9. const int ledPin = 9; // Test LED wire to ...

He’s included a 150 ohm resistor on the collector of each transistor. It must be set up to only allow one segment ... As for date and time, an Arduino board monitors a DS1307 RTC and manages ...

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 ...

Now, everything’s set up, so click the right-facing arrow near the top-left corner of the Arduino IDE window ... You may also want to use a resistor here to prolong the LED’s life, but for ...

Now lets see the schematic and how I’ve connected the 8 leds + resistors and 1 button + pull-up resistor to the Arduino Board (this was the easy ... In the setup() function we set all led pins as ...

LOW); // set the LED on The Arduino Micro is closely related to the Leonardo, with some small difference. Each led in both is connected in series with a 1kΩ resistor to limit current. One ...

To the human eye, it looks like multiple LED’s are lit up simultaneously. [Alex] planned to use an Arduino to control ... had to run the signals through a set of PNP transistors to flip the ...