DB-25 ILDA breakout board

[mccarrot]

PLEASE consider a optocoupler for the R G B I.

I allready damaged 5 laser diodes because the QM.NET controller give a voltage peak when you switch off the QM!

Or at least transorbs or zener diodes to prevent ESD discharge or other voltage higer than 5V on the RGb inputs.

[DZ]

PLEASE consider a optocoupler for the R G B I.

I allready damaged 5 laser diodes because the QM.NET controller give a voltage peak when you switch off the QM!

Or at least transorbs or zener diodes to prevent ESD discharge or other voltage higer than 5V on the RGb inputs.

Funny you should mention this, the color board will have a feature similar to this.

[mccarrot]

Here is a photo and schematic of the breakoutbox made by a forum member on the german laserfreak forum.

[-=Jim=-]

I'll take 2 when you start your next production run.

[DZ]

Should be less than 2 weeks now.

mccarrot, thanks for sharing, however this board is not intended to be an all-in-one solution. There's another forum member here working on that and I'm sure this information may be useful to them.

[mccarrot]

Can you tell me more about the specs of your board.

If it contains protection I'll take 2.

I'm in the urgent need to protect my red diode drivers, because since I switchedd the the QM.NET solution I allready blown 6 diodes.

Protection in the QM net really sucs...

[loopee]

I'm in the urgent need to protect my red diode drivers, because since I switchedd the the QM.NET solution I allready blown 6 diodes

SO wouldn't this be a fault of the diode drivers not the QM board

Any protection mechanism should alway be closest to the item it's protecting

[DZ]

Can you tell me more about the specs of your board.

If it contains protection I'll take 2.

I'm in the urgent need to protect my red diode drivers, because since I switchedd the the QM.NET solution I allready blown 6 diodes.

Protection in the QM net really sucs...

Can you tell us more about how about how a QM2K in a QM.net is destroying your diodes? In my opinion, the best protection you can have for you projector is to have it connected to a QM2K, whether in a PC or a .net. I don't even like connecting my projector to an ADAT anymore.

What type of diodes are you using, what type of driver, how is it all wired? With the aggregate experience of the folks on this forum, I'm sure we can get to the root cause of this problem with some more information.

[mixedgas]

sounds like all he needs is a 6V zener to ground on his projector inputs. A real good driver would protect against overcurrent to begin with.

Optos have really nasty transfer curves VS time. I've looked at the LF circuit posted earlier in the thread and I think it sucks. If your gonna use a opto for signal transfer, you either need a much newer part then what is used in that drawing, one designed for fast signal transfer, or you need a second identical opto for eaqch channel in a opamp feedback loop to compensate for the transfer curve that the opto has.

Steve Roberts

[DZ]

Are you refering to the CNY74-4H? It is an opto coupler, the only problem is the way it's being used in that circuit, it's not offering any real protection. It appears to be just a way to disable the inputs. I'm not sure why you would need that, if you're in a situation where you need to stop the projector, I'd just rather use an EPO.