![]() Just search the internet / ebay for " 20Kpps galvo" and you should find an adequate set. The most expensive parts of this project are the 20Kpps galvos. If you want to build the (optional) ILDA amplifier, see the parts list in the amplifier step. ![]() a box/casing to mount the project (optional but recommended).some Lego bricks (optional, for the laser mounting).some crocodile/alligator clips (to easier connect the laser pointer).MCP4822 DAC (a cheap dual channel 12 bit DAC).a 220V or 110V power cord (if galvo power supply does not come with a cord).20Kpps galvos with driver cards and power supply (these typically come in a set, see below).an Arduino UNO / Nano (or a compatible clone) + USB power.Using speakers is very limited regarding quality and complexity of the objects you can draw, which is why we use real galvos in our project. I was originally inspired by the following project, which explains quite well how laser projectors work and which uses speakers to simulate the galvos: Optimized for small program size (PROGMEM font/objects) and speed (fixed-point arithmetic) Īll source code is provided and can be easily adapted to create your own show!.Drawing effect (draw object or text incrementally).Text rendering (including zoom/translate/rotate). ![]() On the software side, a complete Arduino sketch is provided which features: ![]() ![]() You can build this project if you have some basic experience with an Arduino board and a breadboard.You can get away without any soldering, although it is probably a better solution to solder a PCB finally. On the hardware side, we build the Arduino driven projector by using a external 12Bit DAC (digital to analog converter) and an (optional) amplifier circuit to create the signal for the galvonometers. We are using real galvos (galvanometers) like in commercial laser projectors, since these have become quite affordable recently (around 100 Euros/Dollars) and provide a much higher quality than speakers or stepper motors. In this project we use an Arduino UNO/Nano to run a laser show with a laser pointer. ![]()
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