0

The Laser Doodler

Over at ch00ftech, there is a great tutorial on using an Adafruit LED matrix as a display, and a sensor.

So when this display arrived in the mail, I wanted something to do with it so I could get accustomed to the pinout and LED intensity. I thought it would be fun to create a simple display that can be “drawn on” with a light source. An LED would work, but using a laser allows you to doodle from across the room if your hand is steady enough.

In order to accomplish this, the display needed to alternate between being a display and being a sensor. During its sensor stage, it records where the laser dot is located, and during its display stage, it lights up the LED associated with the laser dot’s position. But how do you make an LED matrix into a sensor matrix?


Join 6,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython in 2018 – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Aquarium troubles: the cost of iteration and troubleshooting with a manufacturers abroad

Wearables — Plastic gem know-how

Electronics — Counting Pin Numbers

Biohacking — Exploring Our Inner Reality : Entopic Visions

Python for Microcontrollers — CircuitPython 3.0.0 Release Candidate 0 released!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.