Results 1 to 4 of 4

Thread: 200mw mains powered chinese laser? power adgustment?

  1. #1
    Join Date
    Nov 2014
    Location
    mid michigan
    Posts
    792

    Default 200mw mains powered chinese laser? power adgustment?

    Click image for larger version. 

Name:	$_57.JPG 
Views:	10 
Size:	102.9 KB 
ID:	46062
    does any one have experience with this laser? mine works fine i just would like to turn down the power for some applications. on the inside it has 2 adjustments one is for the tec and i don't know the other, i just got it so i don't want to be careless with it. it runs on 120-240 volts, has a tec with feed back but the damn maker sanded off the markings on the main semiconductors. now that i think about it i should have opted for analog control rather then ttl.
    Right now i think i will cut some of the beam power with a prism
    Last edited by Draco; 01-16-2015 at 11:36.
    Polk SDA SRS, Parasound HCA 3500, Luxman M117, Onkyo 504, 7.62X39, sometimes a ball on a string is the greatest of toys for us nonhuman types. oh and some lasers, lots of lasers

  2. #2
    Join Date
    Nov 2014
    Location
    mid michigan
    Posts
    792

    Default

    i have a second question regarding TTL control, grounding the line, does that blank the beam or does a logic high blank the beam?
    it seems this hunk of crap is working backwards from what i know TTL to be, unless they sent me an analog controlled unit, that would be a plus
    Last edited by Draco; 01-17-2015 at 02:34.
    Polk SDA SRS, Parasound HCA 3500, Luxman M117, Onkyo 504, 7.62X39, sometimes a ball on a string is the greatest of toys for us nonhuman types. oh and some lasers, lots of lasers

  3. #3
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,477

    Default

    Chinese "TTL" lasers often need a NPN transistor to pull down their blanking input. Sometimes a HC series 74HC04 inverter will work, but usually the inverter needs to be a NPN with say 1K ohm in the base and 470 ohms in the collector to pull down the input. A quick test is to short the input to the laser's Ground via a low Cost Radio Shack 470 Ohm, 1/4th watt resistor. If the laser winks out, you need a pulldown. If the laser does not blank, check switch settings.

    Steve
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  4. #4
    Join Date
    Nov 2014
    Location
    mid michigan
    Posts
    792

    Default

    Thank you, it did blank when i grounded the line, right now i just built an adapter with a switch, i have the other parts and will build a circuit for that
    Polk SDA SRS, Parasound HCA 3500, Luxman M117, Onkyo 504, 7.62X39, sometimes a ball on a string is the greatest of toys for us nonhuman types. oh and some lasers, lots of lasers

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •