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Old 07-21-2010, 01:03 AM #1
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Thumbs down Simple little twinkler. No need for circuit?

I know how fustrating it is for you guys to have newbies ask dumb questions. So i did a little research before hand.

I have this laser light in pieces on my desk.
>>> Music Active DJ Club LED Green n Red Laser Stage Light on eBay (end time 10-Aug-10 11:45:29 BST) <<<

The supplied adapter did not fit in my wall. The unit needs 5Vdc, and the only spare one i had did either 4.5v or 6v. You can guess which one i chose.

Long story short the +1 extra volt smoked a little chip on the board, but all the laser diodes and mirror motors inside are fine. The lasers are 50mw green, and 100mw red. They are also 'LED lasers'?

What i need to know is do both lasers take 5Vdc or did the circuitry bring it down to say 3Vdc, or 5V for one and 3V for the other, etc.

Thanks for any help!


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Old 07-21-2010, 01:06 AM #2
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Default Re: Simple little twinkler. No need for circuit?

Pictures would be useful - without pics, the only way anyone could help is if they had one of their own.
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Old 07-21-2010, 01:08 AM #3
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Default Re: Simple little twinkler. No need for circuit?

There are pictures on the linked page, unless you mean images of inside the unit? ill post some up now.
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Old 07-21-2010, 01:13 AM #4
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Default Re: Simple little twinkler. No need for circuit?

Its not that dumb a question really. I assume the unit contained some TTL chips and/or a microcontroller that required 5 volts exactly and did not survive 6 volts fed to it from the adapter.

Taking some pictures of the internals would certainly be helpful, so we can suggest how to test if the actual lasers are still in working order or also fried.

Just running some tests could easily solve if the lasers are dead or not, even without repairing whatever circuitry you managed to blow up... although i suppose that adapter put out a lot more than 6 volts to fry anthing.
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Old 07-21-2010, 01:17 AM #5
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Default Re: Simple little twinkler. No need for circuit?

Interesting you should say that - i know adapters get warm, but i just took this one out the wall (left it in unconnected) and the plastic was melting.. cant have been right..

Anyway, heres a pic of the two lasers, and the little motor/gobo that difracts the beams.



Ill probably do some tests with a multimeter and a variable power supply to find the minimum volts where the diodes are brightest - that the right step to take?
Thanks
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Old 07-21-2010, 12:00 PM #6
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Default Re: Simple little twinkler. No need for circuit?

I believe this is the laser i have:

>> http://www.laserss.com/doc/6194SH2-090714101443.pdf <<

It says the power type is 'CW' or continuous wave. Is that reffering to its output or its input?
I tried it on 2.88v dc today both polarities and it flashed dimmlyfor a split second then nothing. **baffled**
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Old 07-23-2010, 02:21 AM #7
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Default Re: Simple little twinkler. No need for circuit?

If it says 5v, use 5v. Many digital circuits have a very narrow voltage range.
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