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Old 06-04-2015, 01:26 PM #1
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Default Disabling/bypassing driver switch

Hey guys. I recently bought two 532nm modules from Offroadfreak that are meant to be used in pen pointers. However, I want to use one of them in a host that has a tailcap clicky switch. How can I disable, or better said bypass the switch that's on the module so it turns on instantly when connected to a battery?

Here a picture of the modules (hope you don't mind me using your pic Offroadfreak)



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Old 06-04-2015, 01:32 PM #2
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Default Re: Disabling/bypassing driver switch

gozert, take a look at this thread, I think this is what you want to do. The diagrams are pretty good and straightforward.
Laser Module Taking out button?

Remember that those 532nm modules are case positive!
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Old 06-04-2015, 01:43 PM #3
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Default Re: Disabling/bypassing driver switch

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Originally Posted by BowtieGuy View Post
gozert, take a look at this thread, I think this is what you want to do. The diagrams are pretty good and straightforward.
Laser Module Taking out button?
Thanks! That's exactly what I was looking for. Does it matter which side of the contact points you connect though? Or do I have to connect them on both sides?

Edit: +rep added!
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Old 06-04-2015, 01:46 PM #4
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Default Re: Disabling/bypassing driver switch

Check out post #7 in that thread, if their are four contacts, you can determine which two need to be bridged that way.
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Old 06-04-2015, 01:49 PM #5
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Default Re: Disabling/bypassing driver switch

You're right. A moment after I posted I saw it. Too late to edit though haha. About the module being case positive, in this case I just connect the positive wire to the host and the negative to the battery right? Or is there a whole different method for getting it working when a module is case positive?

Edit: nevermind I think I got it. Thanks again!
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Old 06-04-2015, 02:00 PM #6
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Default Re: Disabling/bypassing driver switch

Yep, you can just put the battery in with the (+) facing the tailcap, as long as you have a good electrical connection between the module, and the host.
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Old 06-04-2015, 04:59 PM #7
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Default Re: Disabling/bypassing driver switch

Starting the build in an hour or so, but wanted to confirm some things before messing up a module.



So I took this pic from another thread and added a bit. Do I need to isolate the whole module from the host, or can I just fit the positive wire between the host and module without any isolation?
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Old 06-04-2015, 05:06 PM #8
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Default Re: Disabling/bypassing driver switch

You don't want to isolate the module from the host, you need an electrical connection from the body of the module to the host (+). You shouldn't need the pos. wire at all.
I see you are showing a flexdrive driver in your diagram. Those 532nm modules have the driver already built in to them.
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Old 06-04-2015, 05:22 PM #9
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Default Re: Disabling/bypassing driver switch

Quote:
Originally Posted by gozert View Post
Hey guys. I recently bought two 532nm modules from Offroadfreak that are meant to be used in pen pointers. However, I want to use one of them in a host that has a tailcap clicky switch.
You didn't say what host you are using, with some hosts the heat sink and module will be isolated from the host because of anodizing. You should test it with your DMM to be sure because there is a possibility you may need the + wire but probably not.

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Old 06-04-2015, 05:56 PM #10
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Default Re: Disabling/bypassing driver switch

Quote:
Originally Posted by BowtieGuy View Post
You don't want to isolate the module from the host, you need an electrical connection from the body of the module to the host (+). You shouldn't need the pos. wire at all.
I see you are showing a flexdrive driver in your diagram. Those 532nm modules have the driver already built in to them.
The flexdrive already in the picture and I forgot to took it out, sorry for the confusion. The positive wire is on the very far end of the driver on the modules side. Not sure what exactly the driver is that this thing is using, but it's already soldered to the module.

Here are pictures of the actual host and module. The module is already sitting in the heatsink.



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Old 06-04-2015, 06:06 PM #11
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Default Re: Disabling/bypassing driver switch

Looks good, you may want to add a spring to the (-) contact of the driver for better contact, and to keep from pushing the driver against the diode.

Sometimes I'll add a little dab of epoxy to the driver board (see picture below) where it meets the diode, this will also help to keep the driver from being forced against the diode.


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445nm Build "Ole Blue" (2.8W+)
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450nm Custom JETLASERS Ti-B (327mW)
462nm Solarforce T2 (2.1W)-link-
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470nm "Silver Bullet"
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520nm Ehgemus Custom (1.45W) •Coleman Jr. (234mW)
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532nm 1.5W Goldenstar lab (3W)
532nm 500mW JETLASERS PL-E (754mW)
532nm 100mW JETLASERS Ti-B (161mW)
532nm 5mW "Eclipse" mints tin (54mW)

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589nm 50mW Dragonlasers Spartan (124mW)

594nm L/G Rigel-6 "LPF Anniv. Ed." (6.7mW)
635nm 20mW JETLASERS Ti (30mW)
638nm Custom JETLASERS Ti-B (232mW)-link-
638nm "Coleman Special" (260mW)
638nm Build in sinner's "MS-SSW Stubby" (1.25W)
650nm W/L E2 (89mW) • Laserbtb PL-650 1000 (1W)
660nm S/S Build (383mW)
674nm 501B/Melles Griot u/k Build 20mW

LK-3D Projector

5W Ophir/dmm LPM, nospin 5W LPM

Last edited by BowtieGuy; 06-04-2015 at 06:10 PM.
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Old 06-04-2015, 06:08 PM #12
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Default Re: Disabling/bypassing driver switch

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Originally Posted by BowtieGuy View Post
Looks good, you may want to add a spring to the (-) contact of the driver for better contact, and to keep from pushing the driver against the diode.

Sometimes I'll add a little dab of epoxy to the driver board where it meets the diode, this will also help to keep the driver from being forced against the diode.
Yeah I was planning to do that. Otherwise it's gonna be difficult having a good connection with the battery. Just to be clear, can I cut off the positive wire and let the module touch the host?
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Old 06-04-2015, 06:13 PM #13
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Default Re: Disabling/bypassing driver switch

Yes, assuming, as pi has mentioned, that there is no anodizing, and you have a good electrical connection from the module to the host.

Edit - If you add a spring to the driver, check for your available length in the battery tube, you may have to use a shorter battery.
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Last edited by BowtieGuy; 06-04-2015 at 06:17 PM.
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Old 06-04-2015, 06:17 PM #14
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Default Re: Disabling/bypassing driver switch

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Originally Posted by BowtieGuy View Post
Yes, assuming, as pi has mentioned, that there is no anodizing, and you have a good electrical connection from the module to the host.

Edit - If you add a spring to the driver, check for your available length in the battery tube.
Got it. Thanks for the help both of you!
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