Old 08-16-2013, 01:22 PM #1
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Default How to Replace Spring with Wires?

hi, i'm new to this website, and was just wondering how i could replace the springs on a laser diode with positive and negative wires? I'm basically new to these things. I can get a laser working but just wondering how to replace the spring with wires. A guide or video tutorial would be great.


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Old 08-16-2013, 01:38 PM #2
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Default Re: How to Replace Spring with Wires?

Do you have a soldering iron?
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Old 08-16-2013, 01:42 PM #3
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Default Re: How to Replace Spring with Wires?

Yes i do.
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Old 08-16-2013, 01:50 PM #4
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Default Re: How to Replace Spring with Wires?

I assume you have a laser module. You just heat up the part where the spring attaches to the driver board and try to pull it off.
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Old 08-16-2013, 02:39 PM #5
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Default Re: How to Replace Spring with Wires?

Yep, and then?
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Old 08-16-2013, 02:50 PM #6
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Default Re: How to Replace Spring with Wires?

Then you take a couple pics and show us. Because I didn't knew a laser diode had springs.
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Old 08-16-2013, 02:59 PM #7
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Default Re: How to Replace Spring with Wires?

i meant like the module.
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Old 08-16-2013, 03:03 PM #8
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Default Re: How to Replace Spring with Wires?

Each driver/diode has a different connection/pinout... Do you want us to guess what do you have?

Repeating. Pictures, please.
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Old 08-16-2013, 03:34 PM #9
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Default Re: How to Replace Spring with Wires?

Quote:
Originally Posted by ichistar2013 View Post
Yep, and then?
Solder a wire in place of the spring

Again, picture will help.
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Old 08-16-2013, 09:20 PM #10
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Default Re: How to Replace Spring with Wires?

You have to figure out weather the spring is making contact with + or - terminal on the battery, then solder accordingly. I was taught to always tin the wire first before soldering. It can be difficult to get the solder to stick to the wire unless you use flux. Liquid rosin flux usually works very well for this.
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Old 08-17-2013, 12:52 AM #11
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Default Re: How to Replace Spring with Wires?

Hi, sorry for the late reply, i have a link here: 30mW 405nm Blue-Violet/Royal Purple Laser Module (3V) - Free Shipping - DealExtreme this is the exact one, Also a question; if it says 3v that means i can only use 3v and no more higher? (what are the causes if i use more than that?)
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Old 08-17-2013, 03:40 AM #12
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Default Re: How to Replace Spring with Wires?

That spring would be easier to snip in the middle on both sides and pull out the pieces. If not you will have to heat both sides at once and "unscrew it". All it requires is 3V. If you run it higher it will run hotter and potentially ruin it.
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Old 08-17-2013, 03:50 AM #13
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Default Re: How to Replace Spring with Wires?

This is clearly a boost driver, so it would only run hotter if there was no regulation. I don't see any other reason for having a 0.1 ohm resistor in there besides current sense for regulation purposes. In fact, it will probably run cooler with higher voltage. 4.2V should be fine in theory, just as long as the supply voltage is lower than the diode forward voltage by a certain margin.
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Old 08-17-2013, 04:01 AM #14
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Default Re: How to Replace Spring with Wires?

Did someone delete my reply? It seems like some posts are missing. Anyway, I had said you can see that the spring is marked negative and the little hole with the V+ above it is the positive. It could be that there are notches cut into the end of the board and the spring will just pull out when heated. You can't really tell from the pictures. Otherwise you will have to do as Speedy78 says.

Since the driver is a boost converter, using more than 3V is potentially risky for both the driver and the diode. If you have a variable voltage supply, you can put a finger on the board and slowly turn up the voltage. Also keep an eye on the current draw. When the current starts rising or the board gets hot, you know that the voltage is getting too high.
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