Dual Red

[FlightLevel350]

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?

 

[jaycey]

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

 

[andy_con]

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

 

[Meatball]

Any particular reason that LASORBS are more necessary in scanners? Is it just because of the series connection between the diodes in this case?

 

[andy_con]

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

 

[HIMNL9]

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 .....