Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: My shutter

  1. #1
    Join Date
    Jan 2008
    Location
    Belgium
    Posts
    1,009

    Default My shutter

    Yesterday, I received my solenoid I planned on using as a safety shutter in the mail. (It was smaller than I expected)

    I got to work right away. I made a flag, a driver and a mount

    Here are the results

    ps: The L-piece the solenoid is mounted on will be shortened

  2. #2
    Join Date
    Jul 2007
    Location
    Knoxville, TN & Huntsville, AL, USA
    Posts
    3,140

    Default

    Quote Originally Posted by FourDee View Post
    Yesterday, I received my solenoid I planned on using as a safety shutter in the mail. (It was smaller than I expected)

    I got to work right away. I made a flag, a driver and a mount

    Here are the results

    ps: The L-piece the solenoid is mounted on will be shortened
    Nice - small is good in this case!

    If you don't mind, post the details on the parts, circuit, etc. you used - that looks like something many of us could use!

    Randy
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

  3. #3
    Join Date
    Jul 2008
    Location
    Rotterdam, Netherlands
    Posts
    789

    Default

    nice work, buurman :-)

  4. #4
    Join Date
    Jul 2008
    Location
    Eugene Oregon
    Posts
    952

    Default

    nice looking shutter! i like it!
    -Josh

  5. #5
    Join Date
    Jan 2008
    Location
    Belgium
    Posts
    1,009

    Default

    The circuit is pretty straight forward. An optocoupler and a mosfet (with internal protection diode).

    You could even drive the mosfet directly, but I like to be safe
    The circuit draws less than 6mA from the dac at 5V. The mosfet here can drive loads up to 30 amps at 10 volts
    You can choose any optocoupler/FET combination, but if the mosfet doesn't have an internal protection diode, don't forget to add one externally

    V+ and V- are the power connections (any voltage up to 55V)
    S+ and S- are signal connections (5v ttl)
    C1 and C2 are the connections for the solenoid coil

  6. #6
    Join Date
    Jul 2005
    Location
    Flying over a town near you
    Posts
    1,404

    Default

    Nice! Should handle a lot more load than a TIP120 ! This has a lot of other uses as well...
    You are the only one that can make your dreams come true....and the only one that can stop them...A.M. Dietrich

  7. #7
    Join Date
    Jan 2008
    Location
    Belgium
    Posts
    1,009

    Default

    You can add a led with a series resistor parallel to the solenoid for an emission indicator too
    (that's what i did)

    ps: the +5V on the schematic is just in my case, you can use whatever voltage you need for your shutter

  8. #8
    Join Date
    Jul 2007
    Location
    Knoxville, TN & Huntsville, AL, USA
    Posts
    3,140

    Default

    Thanks for posting!
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

  9. #9
    Join Date
    Nov 2007
    Location
    Sydney, Australia
    Posts
    600

    Default

    I have a solenoid similar to that one that Iím thinking of installing into my projector, but I was going to use a flag design like this

    I see the benefits of this being:
    1. The flag is balanced therefore requiring less effort to move and increase responsiveness of the shutter.
    2. As the flag is balanced less vibration is created (less likely chance that the flag will slip on the shaft)
    3. And as both sides of the flag are used (top and bottom) the beam cut off would be faster
    Similar to your design it would be it setup so that it needs to be powered to un-block the beam and the only issue would be if something happened to the spring.
    RTI Piko RGB 4 Projector
    CT6215 Scanners & CT 671 Amps; CT6210 & Medialas Microamps. GS124PD
    RGBLaser Systems 6000mW RGB Module - 638nm/445nm/532
    LD2000 Pro + QM2000.net + Beyond
    Etherdream + LSX

    Old Projector Build


  10. #10
    Join Date
    Jan 2006
    Location
    Akron, Ohio USA
    Posts
    1,754

    Default

    If you forget about the response time of the motor and just look at the TTL switch, how fast can that thing go?

    James.

Posting Permissions

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