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Old 04-29-2014, 03:52 PM #1
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Default Momentary Switch to DPDT Switch

**I'm terribly sorry for double posting but time is of utmost importance thus I need the highest possible chance for someone to see my request.**

Hi guys, I'm following this Instructable (Step 9) Laser Spirograph on building my first spirograph and I'm completely lost as to where I have to solder a wire to the "right component of a surface mount transistor" to bypass the switch and allow me to use a DPDT toggle switch instead of the momentary button switch.

PLEASE help!!




http://postimg.org/image/6ymbkzw1f/
http://postimg.org/image/bvzw63y0j/


This project is due in 6 hours so I'm cutting it quite close. Thank you!!


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Old 04-29-2014, 04:03 PM #2
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Default Re: Momentary Switch to DPDT Switch

I'm terribly sorry for negative repping you, but double-posting on purpose is of utmost importance not to do.
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Old 04-29-2014, 04:27 PM #3
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Default Re: Momentary Switch to DPDT Switch

Just solder the leads on your new switch onto the leads of the momentary switch.
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Old 04-29-2014, 04:40 PM #4
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Default Re: Momentary Switch to DPDT Switch

I'm assuming the two contact points on the sides of the momentary switch. The instrucable tells me to wrap a red wire around the heatsink and a black wire to the surface mount component on the opposite side of the switch, however. What would be the reasoning for his logic?

I'm a complete noob at this but I learn quickly so patience please!
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Old 04-30-2014, 07:23 AM #5
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Default Re: Momentary Switch to DPDT Switch

Quote:
Originally Posted by Sybaril View Post
I'm assuming the two contact points on the sides of the momentary switch. The instrucable tells me to wrap a red wire around the heatsink and a black wire to the surface mount component on the opposite side of the switch, however. What would be the reasoning for his logic?

I'm a complete noob at this but I learn quickly so patience please!
Please also show patience and not double post. I don't think you'll do it again though. At least you've taken some decent pictures though; some people post these 8 megapixel blurry blobs with the background plant in focus.

But anyway...

Think about what that switch is doing for your laser: when you press it, it connects to the two electrical connections attached to the switch together and you get laser light out. Likewise, you can make your own "switch" by connecting wires to each of the connections of the switch. You could even remove the switch after if you want.

I would also not follow the Instructable guide directly. Those green laser modules are made by hundreds of different manufacturers. I've ordered them from the same supplier, the exact same model, in the same online-order, and they still had different circuit boards.

The most reliable thing is to solder to the switch, or if the module has no switch, treat the case as positive and the spring as negative and put the switch elsewhere. Regardless, you'll need to attach power to those points anyway.

You'll also probably want to heatsink that module somehow. They can get hot.
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Last edited by Bionic-Badger; 04-30-2014 at 07:23 AM.
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Old 05-04-2014, 11:02 PM #6
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Default Re: Momentary Switch to DPDT Switch

OP
please resize ALL pics to medium
I generally never reply if you do not have your location in your profile-- at least what country- AND few here will sell to you unless we have your DOB in your porfile too-
BTW

any untrue info is grounds for a pema ban-

hak

PS we need to hear back from you??
where you able to turn in your project on time??
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