Hi All.
The other day I bought a Dual-Head disco laser at a local pawn shop.
I bargained them down because the red laser diode was so dim, you could barely see it in the daylight.
The specs say it has a 60mW Green, and 120mW Red Laser, but as this is a chinese unit, any lies are possible
The green laser assembly is larger than the red one.
I started a discussion on http://www.eevblog.com/forum/repair/measuring-laser-diode-powersupply/
Which was basically for me to try figure out what replacement laser diode I can get.
A recommendation was to put a DVD writer Red Diode in there, which I did, and it works. But the only one I had does not have lenses. They are part of the DVD Laser Assembly caddy. I tried to take it out, and put it in the housing replacing the red diode, but I could not get a focused beam.
If I leave it in the DVD Laser assembly caddy, it does work quite bright.
I measured the current and voltage while running this new laser diode, and it was giving
150mA Average
2.65V Almost Constant.
Which works out to almost 400mW.
Now, I was wondering, are the laser diodes classed by their input power draw, or light output?
Because to me this means that the Laser diode is a 400mW one???
How can I figure out the proper diode I will need.
Attached are pics of the whole laser, as well as the powersupply that drives them.
(I did replace all the rusted resistors at the bottom of the powersupply board)
Thanks for any help you can provide.
Peter
The other day I bought a Dual-Head disco laser at a local pawn shop.
I bargained them down because the red laser diode was so dim, you could barely see it in the daylight.
The specs say it has a 60mW Green, and 120mW Red Laser, but as this is a chinese unit, any lies are possible
The green laser assembly is larger than the red one.
I started a discussion on http://www.eevblog.com/forum/repair/measuring-laser-diode-powersupply/
Which was basically for me to try figure out what replacement laser diode I can get.
A recommendation was to put a DVD writer Red Diode in there, which I did, and it works. But the only one I had does not have lenses. They are part of the DVD Laser Assembly caddy. I tried to take it out, and put it in the housing replacing the red diode, but I could not get a focused beam.
If I leave it in the DVD Laser assembly caddy, it does work quite bright.
I measured the current and voltage while running this new laser diode, and it was giving
150mA Average
2.65V Almost Constant.
Which works out to almost 400mW.
Now, I was wondering, are the laser diodes classed by their input power draw, or light output?
Because to me this means that the Laser diode is a 400mW one???
How can I figure out the proper diode I will need.
Attached are pics of the whole laser, as well as the powersupply that drives them.
(I did replace all the rusted resistors at the bottom of the powersupply board)
Thanks for any help you can provide.
Peter
