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PROJECT
463

Build an Ultrasonic Intruder Alarm with LED Indicator

By Maker.io Staff

Learn how to build an Ultrasonic Intruder Alarm using an Arduino Uno and a few off-the-shelf electronic components.

BLOG
11,818

How to Use a Phototransistor with an Arduino

By Maker.io Staff

Many applications could use phototransistors, for example, a sunrise alarm clock. Learn how to use a phototransistor to create a Light Activated LED fader?

PROJECT
321

Create an RGB LED Sequencer using an M5Stack Core 2 and an Arduino Uno

By Maker.io Staff

An M5Stack touch screen can provide a quick and easy user interface. Here, we use it with an Arduino Uno to control the sequencing of an RGB LED.