This is the second version of my lasershow project. I was using Arduino before but since I started working with linux and RaspberryPi I wanted to move away from Arduino as it is much simpler to write code for me on linux (oh, and of course, multithreading!). Originally based on this project: https://www.instructables.com/id/Arduino-Laser-Show-With-Real-Galvos/
- Written in C++ for Raspberry Pi (all versions should work).
- It uses popular WiringPi lib to control GPIOs.
- It uses ABE_ADCDACPi c++ library from ABElectronics for controlling digital to analog converter from Rpi.
- Raspberry Pi Zero
- MCP4822 DAC. I created my own board for that but you can use e.g. ADC-DAC Pi Zero as well.
- galvo kit (2 galvos + controller board)
- laser diode (e.g. green)
- Install WiringPi: http://wiringpi.com/download-and-install/
- Clone this project
- Run
maketo build executable - Start with
./lasershow 0 ilda-files/test.ild(0 means delay after every point in microseconds) - Have fun!
Btw, to create own ILDA files I like to use Laserworld Showeditor which has a free version with limited features (but enough for making ILDA files). It's a bit buggy I know but as soon as you get over it you are just fine :) If you know about good open source / free lasershow editor out there that has ILDA export functionality let me know! Btw#2, this project currently supports only ILDA type 1, so make sure you export correct version.
The code is using SPI for communication with DAC and one GPIO for laser diode:
/-----------------------------------------\
| MCP4822 | RASPBERRY ZERO |
|-----------------------------------------|
| PIN 1 (Vdd) | +5V pin, e.g. 2 |
| PIN 2 (CS) | PIN 26 (CE1) |
| PIN 3 (SCK) | PIN 23 (SCK) |
| PIN 4 (SDI) | PIN 19 (MOSI) |
| PIN 5 (LDAC) | GND pin, e.g. 20 |
| PIN 7 (Vss) | GND pin, e.g. 6 |
|-----------------------------------------|
| PIN 8 (VoutA) | To galvo X |
| PIN 6 (VoutB) | To galvo Y |
| LASER ON | PIN 11 (WiringPi pin 0) |
\-----------------------------------------/
