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. 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. I was originally inspired by the following project, which explains quite well how laser projectors work and which uses speakers to simulate the galvos:.
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. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson.
For this, you need to buy a cheap red laser pointer. On my pointer, I just used duct tape to permanently press the button. Next you need to remove the battery case back part of the pointer and add power supply wires instead of the batteries. If your laser pointer draws too much current to be safely connected to the digital output of the Arduino, you have to use a transistor or MOSFET to switch it.
My pointer worked without problems, so it probably draws less than 50mA. The pointer needs to be at the correct height to point into the galvos, for this you need to build some holder. I used some Lego bricks to build the holder, see above picture. Of course you can use any other material to build it. In my set, the power supply did not have a power cord, so I added a standard 3 wire power cord I used an old PC power cord and removed the PC connector.
I recommend that you get some kind of box to mount everything in and reserve an extra isolated spot for the power supply. I glued a plastic box on top, covering the power supply so that nobody can touch the high voltage input. Now connect the cables from the power supply to each driver card and each driver card to one of the galvos.
You should have two remaining connector cables, which you can plug into the ILDA input of each card. You can either use these connector cables or instead you may use individual female jumper cables instead. It is available for euros.
It offers dual channel 12bit and there is an Arduino library available for it. It will generate two output signals ranging 0V to 4.
This leaves us with DAC pin 6 and pin 8 which provide us with the two analog output signals. In a later step, we will learn how to create a correct bipolar signal.
The DAC code is inside of the Laser. Don't forget to add an opening so that the laser ray can be emitted. As you can see in the picture, I have plenty of room left, so I should have choosen a smaller box. After everything is mounted, place the laser pointer near the galvos and adjust it so that it points into the center of the first galvo. I recommend to not fixate it at this point, so that you can re-adjust it later on.
Arduino Laser Show With Real Galvos
You could also get the power from the galvo power supply, but this would require a DC-DC step down module, which is easy to add but out of scope of this project. Your setup should look similiar to the one given in the image above, except for the extra optional amplifier PCB on the image, which will be explained later on.
Since the laser pointer does not have a lot of power, you will need a dark place to fully enjoy the show. Of course you can upgrade the project to a more powerful laser diode, but this is not covered in this tutorial and requires additional safety measures.
Fine Tuning: Have a look at the Laser. In my setup I still had problems reaching the closing point of a contour exactly, probably because of the overshooting. NOTE: you only need to do this step if you want to get a bigger projection angle or if you are eager to learn how to generate bipolar signals and their inverse. In the previous steps, we have already built a working laser projector, but we did not generate the correct bipolar ILDA signal that the driver cards expect.However in these days I don't had the knowledge to program a controller for a galvo scanner.
So I have used an existing firmware with cartesian motion. But today and after some research I found an instructable where the author uses an arduino to create a DIY Laser Galvo show. I thought this is exactly what I am searching for, so I have ordered the parts like in his instructable and made some experiments. Please remember this controller is just a prototype, but usable for a lot of projects.
If you like my Instructable, please vote for me in the Remix Contest. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. Here are all required parts for the galvo controller.
I tried to source all parts as cheap as possible. Here I will you explain, how the controller works in general. I will also show some details for example the calculation of the right angle. The motion controller is the part where you will create the step and direction signals. In addition to the step and direction signals there is a need for a center allignment pin to make the STM32 and the Motioncontroller consitent.
That is because the galvos are absolute controlled and there is no need for any limit switches. The STM32 microcontroller is the heart of this controller. This microcontroller has several task to do. These task are:. The first task is to measure the input signals. In this case it will be step and direction signals.
Because I don't want that the motion-controller will be limited by input frequency, I designed the circuit for kHz tested. In addition to the step and direction signals there is the llignment signal. This alignment is controlled by an external interrupt on the STM Now the controller needs to compute the signals to the right value for the DAC.
Because the galvo will create a non linear polar coordinate system, a small calculation is needed to create a linear dependence between step and actual moved laser. Here I will show you a sketch of the calculation:. Now we need to find the formula for the calculation. Finally I need to thought about the distance d.
I personally want a scan field of xmm, so my d will be 50mm. The high h will be the result of phi and d. To bring the distance d in relation to the angle phi I used a little formula, which will use the tangents and convert the angle from radians into "DAC-values".
Finally I only need to add a bias ofbecause my scanfield is center alignment and all of the calculations are done. I am using TL OpAmps.Stock Animations most probably supplied with the controller because you either couldn't be fucked learning any software or you tried but aren't cluey enough to pick it up quickly….
More wasted server space full of shit to waste peoples time. I bought a same hardware but i cant use attached software fof ild-files.
My was damaged and seller dont want send me it. I would like to create graduation works by obtaining the skills of a certain technology, and of course I am going to use that technology to teach. You didn't make anything ffs.
I know how to buy shit on ebay, I even know how toi find manuals for said shit if I can't work out what plug goes where. They're usually different sizes, it's not hard. At least it isn't one of those tutorials that its just silent while playing the same annoying song over and over.
That's not very much of a "make" video, rather more of a "plug the connectors in, shove it into a cardboard box, and call it yours" video. Wonderful project thanks, could make video on how to design those scatches or pictures and figures!!! Thanks ahead. Galvo Lazer TV.
By far one of the best examples of what not to do with a laser and a set of galvos! Yorumu Cevapla. But, I want to get your advice. I'll be waiting for your contact. How to buy a whole laser projector and drop into a cardbox.
Congratulation, this is amazing! I just have this mental image of Nelson Simpsons pointing and saying " Ha Ha ".
Cheap Dual Mirror Laser Projector
I want to buy.The one exception that it uses singled ended color signals. If you would like a history of this project and how it got to this point please go to the DAC History Page.
The history page details the origin of the idea and its progression over the years. This board is built as an Arduino Shield. It requires a Arduino Duemilanove or compatible Arduino micro-controller board. The newer UNO boards are not supported yet. This is used to control the stream of serial data being sent to the Arduino. The Freeduino will work however it does not break out a pad for the CTS pin this makes it a bit more difficult to modify. I have uploaded the Eagle. They also take Eagle.
BRD files directly. For any other services use the Gerber files provided in the Hardware release below. Most services take Gerber files zipped up in a zip file. Interface DLL V3. Test Program V3. MLD File V1. Then close and restart the IDE.
Use this program to test the OLSD hardware. It can be used by other applications to interface with the OLSD hardware in a standard way. Just simply copy the OLSD. This should overwrite the OSLD.
DLL that is in there already which is the non-public version. This is the Arduino firmware. It will fit in a smaller amount of flash however you may need to remove some of the built in test frames. This firmware supports point output rates up to 30kpps. It also has built in test patterns. These are activated by pressed the button near the ILDA connector. The firmware was developed using WinAVR. There are 2 development environments to choose from. A make file is included.
You can also compile and upload to the Arduino from the command line too. The schematic and board were done in the free version of Eagle CAD.
A PDF version of the schematic has been included. It is possible to write your own programs that communicate with the OLSD device. There is a library to install in your Arduino IDE that allows you to output points at specific rates. There is an example for a point, line, and circle included with the library.
See the downloads above for more information.Logout Register. You do not have the required permissions to view the files attached to this post. To start from the beginning i need also the schedules that shows in the post. Only the link to the eagle files no longer exists. How can I get these files?Max Laser Basics - Episode 9: Hardware
What is the basic process for compiling though, as I've been having huge trouble getting it to work I've tried converting the pre-compiled "main.
Does the framebuffer text support work, as I noticed it is commented out in a few places? I don't have huge in-depth knowledge of Linux, but I have Ubuntu set up on VMware for compiling this sort of thing, and I can generally read and modify most standard C code etc.
I managed to get the OpenILDA folder partly compiling from an Ubuntu terminalbut I can't seem to figure out how to compile the libraries such as bob, emmc etc.? I've also downloaded FAT library version "ff9b" and installed Eclipse Luna, but can't see how to import the libraries, and which folders to include? Also, do you have a quick usage guide for your code, and do you normally just use a serial dongle to talk to the Pi?
I really want to get this working for my projector. I did buy an Olimex MP3 player board a few years ago, but never got around to testing it. The Rasp Pi is so cheap now that it makes complete sense to use it for this sort of thing. Here's an old vid of my lowly projector I'm thinking about building your board and have some questions and remarks please keep in mind that i did not start building yet and those points are of theoretical nature : it took me some time to realize that you have to build a second board in order to get the ilda-board running with the pi.
Jump to. Board index All times are UTC.Animated Lines is a royalty free marketplace for online laser animations purchase. At Animated Lines you can search for laser frames and animations, view watermarked previews and immediately download your purchases. Animated Lines aims to create a platform that lets people discover and enjoy the greatest selection of laser animation. Laser professionals use Animated Lines to both share and monetise their content with a global audience.
When you decide to purchase files, you will get access to the original ILDA source file and can then download the unprotected ILDA file for your personal use. More download formats will be offered in the future. All of our files are sold royalty free, this means the frames and animations can be used wherever you want, for as long as you want, in any production you want.
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Like us and share it! Find animation. Advanced search. About Animated Lines Animated Lines is a royalty free marketplace for online laser animations purchase. Upload your animations and make money! Click here for more information.It's a shame that holographyforum. I heard from a few people stating that they wanted a place to get in touch with members they don't have contact information for, so here we go.
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