Old 07-11-2010, 06:03 AM #1
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Thumbs down Dual Red

I'm working on combining 2 red diodes for a scanner. I am using two LOCs. How do I wire them up so that they are at the same current level as they are being modulated. I am planning on using a flexmod driver (if drlava starts making them again).

Also, I have seen many dual red builds that include LASORBs. Are these really necessary in a scanner?


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Old 07-11-2010, 07:19 AM #2
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Default Re: Dual Red

Lasorbs...YES in a scanner setup.

Wiring, in series, + from driver to + on diode number 1. - on diode number one to + on diode number 2. - on diode number 2 to - on driver.

Simples...innit!

Beam alignment (and keeping it aligned)....not simples
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Old 07-11-2010, 12:13 PM #3
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Default Re: Dual Red

lasorbs on 2 lasers......

so not necessary

a LOC is 2 a lasorb is $8, so more than the laser. if you had a 90 laser diode then yes you would want to protect it
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Old 07-23-2010, 08:45 PM #4
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Default Re: Dual Red

Any particular reason that LASORBS are more necessary in scanners? Is it just because of the series connection between the diodes in this case?
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Old 07-24-2010, 02:27 PM #5
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Default Re: Dual Red

lasorbs arent designed for scanners.

they are designed to add additonal protection to laser diodes. they can be used to protect any laser diode, so in a scanner or pointer.

people seem to want points for free these days so no one is willing to pay $8 to put a lasorb in
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Old 07-24-2010, 03:27 PM #6
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Question Re: Dual Red

Sorry, why not use the old, efficent (and cheaper) diode-capacitor-resistor in parallel to the LD ??

Place in parallel to the LD an 1N4148 diode (reversed respect the LD, ofcourse), an 1K resistor and a 10nF capacitor, and you have the same protection .....
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