{"id":771,"date":"2018-10-08T14:14:24","date_gmt":"2018-10-08T12:14:24","guid":{"rendered":"http:\/\/www.laser-maker.com\/?page_id=771"},"modified":"2019-07-22T09:53:44","modified_gmt":"2019-07-22T07:53:44","slug":"00-description-english","status":"publish","type":"page","link":"https:\/\/www.laser-maker.com\/index.php\/alos-project\/00-description-english\/","title":{"rendered":"00 – Description (English)"},"content":{"rendered":"

\"\"<\/a><\/p>\n

The goal of this project is to make a 5W laser show projector from an enclosure recycling! <\/span><\/span><\/p>\n

An old 19” amplifier rack 3U and 28cm depth or you can use an old out of order laser projector.
\n<\/span>The control part of the project is made from a Raspberry PI model B and two HAT PCB cards (Hardware Attached on Top) so we add two printed circuit boards on top of the nano computer.<\/span><\/span><\/p>\n

PCB 1<\/a> allows to manage the inputs \/ outputs (2 LEDs, 2 push buttons) and the security part (shut when pressing on the emergency stop or the key) It also allows the adjustment of the laser levels of each source <\/span>(up to 4) and the cooling of the computer with a fan. <\/span>It is also on this PCB that we add the additional sensors (temperature, humidity, current in the diodes …)<\/span><\/span><\/p>\n

PCB 2<\/a> manage the laser diodes temperature via the control of a TEC and also contains the electronic circuit “scan-safe” which constantly checks that the laser scanners work and cuts the laser sources in case of problem by acting on the security part.<\/span><\/p>\n

Each HAT PCB card has its own hardware key chip.
\n<\/span>Above all this is the LCD screen to display the different informations at the back of the laser projector.<\/span><\/span><\/p>\n

This set of circuits constitutes a “server” and the application manages a maximum of 3 servers (currently) so 3 different laser projectors can be controlled on a single client application.<\/span><\/p>\n

Communications between servers and clients are done using a bidirectional secure protocol based on TCP \/ IP.<\/span><\/p>\n

Regarding the optical part it is made with a red green blue laser source, already assembled and already aligned. (1.5W red, 1.1W green, 2.4W blue, with overall divergence under 1.3mRad)<\/span><\/p>\n

This is to limit the risks to the maximum, because as you know the lasers are very dangerous for the eyes, the skin, and many other surfaces!<\/span><\/p>\n

For this, we ask you to scrupulously respect the steps of the project and we remind you that laser-maker can not be held responsible in any case.<\/span><\/p>\n

The construction of a projector is measured in hundreds of hours.<\/span>
\nIf you have neither time nor patience, then go your way.<\/span><\/span><\/p>\n

This tutorial is intended to help people who want to assemble their own laser projector, while limiting the risks.<\/span><\/p>\n

Fortunately, the application manages the levels because with 5 W of power this laser projector will illuminate all your small, medium and even big private parties!<\/span><\/p>\n

Good luck, maker!<\/span><\/p>\n

 <\/p>\n

\"\"<\/a> \"\"<\/a><\/p>\n

The application as of March 1, 2019<\/span><\/p>\n