Great news 8)Originally Posted by dave321
Great news 8)Originally Posted by dave321
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Man, I've been an idiot recently... I completely missed this thread.... Ok... here we go.
Yea, its been while since ive played with a FYOE laser and i do remember the blanking being "non standard/Inverted".
With all "real" lasers you have to apply a voltage to slap the opto coupler into shorting/limiting the lead. with these things, its just looking for a deadshort to reroute the diode current. pretty dangerous stuff as far as the DAC's life is concerned.
Chinese lasers are notoriously bad for these type designs.
Sorry I missed the thread like an idiot, ill try to get my brain working again.
I re-open this post
I have this laser too, with TTL modulation only (I have 2 wires for blanking).
But Liteglow, you have the same laser but with ANALOG blanking?
Is it possible (and easy) to change my laser blanking to analog? I definitely need an analog blanking to correctly mix with my red laser
Hi..
I dont think that my laser was analog... :?
I did only belive so becouse of the strange way it did behave when I did connect it to analog signal ... (as I never in my life had seen ANALOG blanking, i did not know better)
But today I know that it was not analog blanking, only a "strange" thing going on..
But I did blow my TTL stuff inside my green laser :roll:
So today it`s only *ON* ... and never off lol
Dont know what to use it for...
Ok... And you can't repair the TTL system? Basically it's only an optocoupler, maybe it's just this that's dead...
I see how TTL blanking works, but I don't see how analog works... Maybe if I know it, I can modify my circuit to achieve analog!
What is modulated? Directly the pump diode current? And with which component? An optocoupler is only on-off, as far I know...
i dunno if I can fix it ?
I did never care anyway...
First there was some problems with the TTL..
Then I think I did blow the circuit, the laser did go BLANK !! no output..
Then I slowly adjusted the volt from 3volt and up to 4.. nothing happend..
5volt.. notting happend.. 7....9...12volt noting... THEN at 20volt :twisted:
there was some black smoke from the TTL circuit, and the laser did go ON :twisted: ..
And the funny thing is that it`s still on working like a dream
without the Blanking....... :roll:
Lol...
I think you blow the optocoupler's phototransistor or diode with the 20V voltage, but why the laser woke up when the TTL smoked?
I will try to reverse engineer the blanking circuit, and if I discover some interesting things, you will be advertised
But you can still look if there is an optocoupler somewhere in the circuit, and verify it...
I will try to take some macro pictures when I got the time
I discovered that I have 3 pins for the blanking, and only 2 are used...
First I wondered that maybe it was analog blanking But no, the third pin is reverse blanking :evil:
The blanking circuit is a SMD circuit, and so not so easy to reverse engineer...
Pfff, who want a >200mW laser TTL for a few bucks, so I can buy a real analog dpss?
@ sbk
What colour is it and how much are you after?
Jim