leds

CLOCK OF CLOCKS ADDS LIGHT PIPE HANDS FOR BEAUTY AND FUNCTION

CLOCK-OF-CLOCKS ADDS LIGHT-PIPE HANDS FOR BEAUTY AND FUNCTION

We’ve gotten used to seeing “meta clocks,” clocks that use an array of analog clock faces and piece together characters using the hands of the clocks. They’re very clever, and we always like to see them, especially when they come with detailed build instructions like this one does. What’s also nice about [Erich Styger]’s “MetaClockClock” display

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Build the LED Circuit

Ultrasonic Distance Sensor in Arduino With Tinkercad

Let’s measure distances with an ultrasonic rangefinder (distance sensor) and Arduino’s digital input. We’ll connect up a circuit using a breadboard and use some simple Arduino code to control a single LED. You may have already learned to read a pushbutton and PIR motion sensor with Arduino’s digital input, and we’ll build on those skills in this lesson. Ultrasonic

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