npaltmp built this Arduino Laser Projector:
I have been playing with Arduinos for about a year now, and I noticed that none of my projects were really utilizing the speed capabilities of the ATmega328 chips. At 16 MHz, they can do a hell of a lot more than blink LEDs. To improve my appreciation of their capabilities, I wanted to build a project which required very fast and precise timings. That is what motivated me to build a persistence of vision alphanumeric laser projector.
My projector uses a single laser and has only one moving part. 6 mirrors are hot glued to a spinning platform. Each mirror is at a slightly different angle, and each is responsible for 1 of the 6 lines of vertical resolution. One full rotation sweeps the laser across the target 6 times at 6 different heights. An optical sensor detects the start of a rotation and times the laser pulses to produce readable text.
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 — How Authority and Decision-Making Differ Across Cultures
Wearables — Perform operation
Electronics — Soldering Pointer!
Biohacking — EGG – Gut Monitoring Using Electrical Signals
No comments yet.
Sorry, the comment form is closed at this time.