Custom laser apparatus for stageshow

Discussion in 'The Projects Forum' started by sonnyangell, Jul 6, 2017.

  1. sonnyangell

    Thread Starter New Member

    Mar 1, 2017
    16
    1
    Hello!

    I recently created a stage apparatus for my band which consists of 13 laser modules each needing 3.7-5v each

    9 Red laser module diodes (650nm - 5mw)
    2 Violet Blue 3v-5v (405nm - 20mw)
    2 "fat lasers" 3.6v - 5v (405nm - 250mw)

    *THESE LASERS WILL BE POINTING UP AND OR AWAY FROM ANYONES EYES - AS WELL AS NOT AT REFLECTIVE SURFACES*

    I would like to use ONE AC adaptor for this setup. I tested 10 of the lasers in a series with a 3.7V AC adaptor to discover some voltage drop (some of the lasers were not illuminating) Then I used a 4.7V AC Adaptor and it works great. I tested this setup for 30 minutes straight without any issues

    I want to be use I am providing the correct and clean voltage to my diodes. Can someone confirms this circuit for me or provide me with a formula that will help me in the future?

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    Last edited: Jul 6, 2017
  2. hrs

    Member

    Jun 13, 2014
    179
    29
    Your images are not showing for me. You can use the "Upload a File" button to attach images to your post.
     
    atferrari and sonnyangell like this.
  3. sonnyangell

    Thread Starter New Member

    Mar 1, 2017
    16
    1
    Thank you! =] Whoops
     
  4. hrs

    Member

    Jun 13, 2014
    179
    29
    Nice laser beams! No circuit diagram though. If you post a circuit diagram someone may be able to help you. Otherwise it's all guess work.
     
  5. DickCappels

    Moderator

    Aug 21, 2008
    4,959
    1,510
    What is the recommended power supply voltage for the red lasers?
     
  6. sonnyangell

    Thread Starter New Member

    Mar 1, 2017
    16
    1
    Hey!! Thank you for replying

    The red lasers require: Operating Voltage 3-4VDC Operating Current 100mA

    The other lasers require 3.7v

    also Here is a crude diagram of the apparatus

    Lasers.jpg
     
    Last edited: Jul 30, 2017
  7. DickCappels

    Moderator

    Aug 21, 2008
    4,959
    1,510
    You can put one or two 1N4001 through 1N4007 rectifiers in series with the lower voltage lasers to drop the voltage for the red lasers.

    You seem to be running a lot of power. You might want to check into government regulations for the country in which you plan to use your array. From memory there are special provisions for live performances. For the United States you would look at the document to which is linked below.

    HHS Publication FDA 86-8260 COMPLIANCE GUIDE FOR LASER PRODUCTS
     
    sonnyangell likes this.
  8. sonnyangell

    Thread Starter New Member

    Mar 1, 2017
    16
    1
    You're the best.. I'm going to read through this today to make sure I don't get in trouble :)

    Let me ask you. Do you suggest attaching one or two 1N4001's to the leads going to the red lasers?? Where should I put them and what else would i need to make this last? All the lasers have a voltage need from aboit 3.5v - 5v

    I was originally using a 3.7v power adaptor for the whole system, when I tested it was all dimmed (I guess from voltage drop?) now since I used a slightly higher voltage I have full visible lasers. But I guess I'm risking frying the lasers now in some spots?
     
  9. DickCappels

    Moderator

    Aug 21, 2008
    4,959
    1,510
    If your red lasers don't draw more than 750 ma total you can try one or two 1N4001 (through 4007) diodes in series to drive all of the red lasers in parallel.

    The chart below from the General Semiconductor datasheet will help you decide whether to use one or two diodes based on the current drawn.
    upload_2017-7-30_22-54-5.png
     
    sonnyangell likes this.
  10. bertz

    Active Member

    Nov 11, 2013
    327
    60
    Laser diodes are not like LEDs. They require special circuitry to drive them including safety controls. See this link.
    I service and repair laser show devices and strongly advise against amateurs trying to build their own. At best they will fry the diodes and be out $$, at worst someone can end up with a permanent injury.
     
    sonnyangell and DickCappels like this.
  11. sonnyangell

    Thread Starter New Member

    Mar 1, 2017
    16
    1
    I am aware of the dangers, however I am only learning and testing now. Dick Capples (above) post listed a document explaining laws and regulations on use of lasers. How the laser should be in a housing and dangers of radiation. So I understand a bit more now.

    I have this burning question..How is it that clubs use the laser boxes with the same if not STRONGER powered laser in them can use them? Id see these things bouncing of people and shining directly on them.
    Look at the power of these lasers. and these fly around and shoot all over the place.. Mine will be stationary and point straight UP.

    laser.PNG

    All of the laser diodes I purchased have the drivers on them already, so that shouldn't be too much of an issue.. however yes I am am amateur, so I am here to LEARN how to safely and properly use them (without burning them out)

    @DickCappels - Since I have drivers on all diodes, do I still need to attach rectifiers? also is there ANYTHING else I need to do for this project to work smoothly


    Here is a full datasheet of the lasers I have for this project. I realized I had the wrong info for the red lasers they run at 5mw not 30mw


    2) “Fat” Violet Lasers (2)

    http://www.ebay.com/itm/Fat-Beam-405nm-Violet-Blue-250mW-Laser-Diode-Module-f-KTV-Bar-DJ-Stage-Lighting/381391292958?_trksid=p2481888.c100675.m4236&_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=d1861c0865d84110b26ce48341d66e40&pid=100675&rk=4&rkt=15&sd=291977365061&_trkparms=pageci%3A4ef57485-754d-11e7-9ef4-74dbd1800fd8%7Cparentrq%3A94900fb915d0a9c56c2a8686ffff2ea0%7Ciid%3A1

    Working Voltage: 3.6v - 4v DC

    Operating Current: 300mA

    Wavelength: 405 nm

    Output Power: 150 mW
    Class: 3B (LOW scale)


    2) Blue/violet Diodes

    https://www.amazon.com/gp/product/B017M7B5NO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1


    Working Voltage: 3v - 5.5v DC

    Operating Current: < 55mhA

    Wavelength: 405 nm

    Output Power: 20 mW
    Class: 3B (LOW scale)

    10) Red Lasers


    https://www.amazon.com/gp/product/B012V3U3KK/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1


    Working Voltage: 3v - 4v DC

    Operating Current: 100mA

    Wavelength: 650nm

    Output Power: 5 mW
    Class: 3R (VERY LOW scale)
     
    Last edited: Jul 30, 2017
  12. bertz

    Active Member

    Nov 11, 2013
    327
    60
    Show lasers are equipped with special safety features which mitigate the effects of the beam. The simplest is they pass the beam through a lens which disperses the beam so that the power is attenuated. In addition, most (if not all) audience scanning lasers are equipped with a feature called PASS. This is a combination of software and circuitry which continuously measures the output of the laser and will trip a shutter if the power exceeds a danger level. It is more complicated than this, but suffice it to say you are way out of your depth if you think you can build your own show laser. Be warned!
     
    sonnyangell likes this.
  13. sonnyangell

    Thread Starter New Member

    Mar 1, 2017
    16
    1

    Hmm makes sense, I am learning a great deal from you..thank you.

    Let's say I dont continue, but... I still want the effect.. WHO do I contact to build it for me correctly.

    OR should I lower the power so they are deemed safe?
     
    Last edited: Jul 30, 2017
  14. bertz

    Active Member

    Nov 11, 2013
    327
    60
    If you lower the power, you lose the effect. With that having been said the company I work for uses show lasers made by arctos and kvant. I am not a shill for these companies, I simply maintain and repair the devices made by these two firms. I'm not sure why the moderator redacted the names but if you want to have a safe AND impressive show, use devices made by companies such as I recommended or similar. Beware of Chinese clones which are not FDA approved and do not incorporate all the required safety features.
     
  15. DickCappels

    Moderator

    Aug 21, 2008
    4,959
    1,510
    URL of manufacturer's site in post #10 restored.
     
  16. DickCappels

    Moderator

    Aug 21, 2008
    4,959
    1,510
    It looks like you can power all of the lasers from a single adjustable power supply that can be set to output between 3.8V volts and is capable of supplying 2A or more.

    Just be careful to use heavy enough wire so that you don't drop below 3.6 volts for the violet, 3.5 volts for the blue/violet, and 3.0V for the red laser.

    It might be best to buy one unless you have a strong desire to build your own.

    This is a link to a non-isolated DC to Dc converter for less than US$1.00 Maybe you can find something similar that you can have delivered soon.

    http://www.ebay.com/itm/Mini-3A-DC-...733300?hash=item3d08911e74:g:3b4AAOSwuAVW1Ql1
     
    sonnyangell likes this.
Loading...