Random Laser Pointer

Design Requirements

Random laser pointer station. Embedded Rust

• Laser moves randomly.
• Configurable x and y area of laser movement.
• Simple USB-C connector for power and programming.

Hardware

• 1 x ESP32 C3 SuperMini
• 1 x 3.3V Laser diode
• 2 x SG90 servo motor to position the laser
• 2 x 10kΩ potentiometer to control the servo X and Y range
• 1 x Latching button to preview the laser area
• 1 x Toggle switch to control power
• 1 x USB-C Female connector for power and programming
• 1 x 3D printed case

Wiring

Development Environment

This project is built in a no_std environment utilizing the esp-hal crate.

• Rust via rustup
• Install ESP32 Rust tooling

cargo install espup
espup install

• Source environment variables in each shell or in shell profile:

. $HOME/export-esp.sh

Resources

• The Rust on ESP Book

Development Environment

• Rust via rustup
• Install ESP32 Rust tooling

cargo install espup
espup install

Final Product

Future work

• Add 'programmer' support for an external module with a little screen and joystick that can be plugged into the main station to program key settings:
  • Speed
  • Bounding box
• Design ergonomic enclosure for programmer
• Upgrade to bigger, more robust, servos
• Redesign main enclosure with wall mounting keyholes
• Take final product image