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?
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!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Ladyada @adafruit & makers removed from @whitehouse website #WHChamps #NationOfMakers @mfgday @makerswomen
Wearables — Velcro dread
Electronics — Your job’s a joke, you’re broke, your semiconductor is DOA
Biohacking — Data After Death
No comments yet.
Sorry, the comment form is closed at this time.