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  1. #1
    TheFlyingDharma's Avatar
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    Default Remote switching for a dob-mounted GLP?



    I recently ordered a new Orion dob with an extra dovetail mount and a GLP-to-scope rail. I've never mounted a GLP before, but I'm concerned that pressing the button to turn it on will nudge the scope, particularly a dob. Has anyone experienced this? If so, what solutions have you found to the issue?

    I probably won't know how much of an issue this will be until I actually mount it, but in the meantime I'm considering modifying the switch on my GLP to counteract this. Possibly by adding some sort of toggle switch or remote switch that I could holster somewhere away from the OTA. Now, I'm pretty handy with hobby electronics but I've never taken apart a laser and don't really know what to expect. I'm sure adding or replacing the switch itself will be a piece of cake, but how likely am I to damage or mis-align the laser in disassembling it? Will I have to collimate the beam afterward?

    edit: After watching some laser-modding videos on youtube it doesn't look like I'll need to mess with the laser assembly at all to get at the circuit board, which is fantastic. However, my question still remains as to whether this would even be necessary or at least useful in minimizing nudges from turning the laser on.
    Last edited by TheFlyingDharma; 05-28-2010 at 12:14 AM.

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  2. #2
    TheFlyingDharma's Avatar
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    Default

    Quick proof of concept because I'm bored. I'm not much of an artist so nevermind the fact that the focuser is on the wrong side.


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  4. #3
    craterdavy's Avatar
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    Default

    I think you don't have to worry about nudging thescope when you push the button.,.,because first off you point the scope in the general direction of your target .,.,then you push the button an get your beam on target.,.,then you release the button.,.,If your laser stays on till you push the button again .,.,just keep ahold of the scope and it should stay put.,.,Plus you will almost always need to center the target in your finder.,.because it's just to hard to get the laser exactly on,., I would play with it a bit before going through the time and trouble to set up a remote switch,.,.,Just my 2 cents.,.,good luck.,.,P.S. your drawing was quite clear.,.,O+O

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  6. #4
    TheFlyingDharma's Avatar
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    Default

    I don't think accuracy will be an issue, Orion makes a pretty good adjustable mountaing rail that can be calibrated like any other finder.

    The situation I had in mind for the switching control was when I'm out with friends and explaining exactly what we're looking at. It really adds to the wonder when you make the connection of what you're looking at through the eyepiece and where it actually sits in the sky. The remote switch would allow me to calibrate more accurately and to activate the laser without having to worry about nudging while the scope is actually trained on an object (probably more of an issue under high mag.)

    I actually started the project while I was waiting for my scope to arrive, but so far I'm having a really hard time removing the tip of the GLP. The videos on youtube make it look easy, but I get the impression my GLP is sealed with excessive amounts of epoxy. My pliers have certainly made their mark on the pointer and I'm ok with the fact that it'll never be pretty again. I may look into insulating the laser housing while I'm at it to cover up the scratches and guard against lower temperatures.

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  7. #5
    WWPierre's Avatar
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    Default

    I like your drawing, in any case.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5; Orion 127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  8. #6
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    It is the eyeball that is not so accurate.,.,you point the laser and it looks like it is right on the star.,.,but a star is a mere spot .,.,to get the laser right on it is not so easy.,.,I have a laser on my scope and with low mag my target is sometimes in the FOV.,.,with high mag it is rarely there.,.I lined up my laser using high mag on polaris.,but alas I am only human.,the target is always in my finder though.,.good luck,.,O+O

  9. #7
    TheFlyingDharma's Avatar
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    Default

    Thanks Pierre. It's the little things.

    @craterdavy: I see your point now. In that case, approximation is good enough for me. The best I can do is try to align it with a distant terrestrial object and go with that.

    I haven't had much time to work on this project today but I've made significant progress. I'll post pictures soon.

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  10. #8
    TheFlyingDharma's Avatar
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    Default

    Finished! Sorry about the dirty carpet, pretend the white specks are the great triangle or something.



    I'd still like to clean up the wire a bit, but it will stay how it is until I find something small enough to insulate a single cat5 twisted pair and still be easily bendable.

    I'm also toying with the idea of adding a second, smaller dip switch on the right to turn on the led built into the red switch. It's just bright enough to use as a small reading light, but currently it's always on. My other option would be simply use the handle as storage for a spare set of GLP batteries. I'm leaning toward the second option since the LED calls for 1.7v and I don't really feel like trying to pack in a resistor AND another switch into the hand controller.

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  12. #9
    WWPierre's Avatar
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    That is very cool. Nice work.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5; Orion 127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  13. #10
    EricFD's Avatar
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    I agree! That is very cool!
    Name: Eric

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