The LED segments of the display require current-limiting resistors when powered from a 5 V logic pin. The value of the resistor is typically between 330 and 470 ohms. And, driver transistors are ...

In this experiment we are going to use a element called photoresistor. This sensor allows us to interact with the external environment, through intensity of light. The photoresistor is based on light ...

Making a servo tester using an Attiny85 micro chip, Attiny45 also works for this project. This diy servo tester is as good as ...

It is a pretty common first project to use an Arduino (or similar) to blink an LED. Which, of course, brings taunts of: you could have used a 555! You can, of course, also use any sort of oscillato… ...

With two LEDs in series, the prior example becomes (9 – 3.1 – 3.1)/0.02 = 140, so you could use one 150-ohm resistor for every two LEDs. Mark evenly spaced spokes a few inches from the rim of ...

Posted in Arduino Hacks Tagged arduino, arduino pro mini, candle, lighting, neopixel, neopixel ring, RGB LED, ws2812b ← Retrotechtacular: There’s More Than One Way To Escape A Submarine ...