die4laser driver help

[andy_con]

ok im running 2x open can reds using one die4laser driver.

details on the driver can be found here

http://www.die4laser.com/dvd-rec/Die4Drive.htm

ive got a 2.2R 0.25 watt resistor connected to both diodes. both diodes are running in parallel to the driver, the resistors were sent to me via robin him self.

the driver is being powered by a 5v 8amp psu

using this excel sheet off robins site ive only got J1 connected so i can have up to 1.4amp being out putted from the driver.

http://www.die4laser.com/dvd-rec/Die...iles/Drive.xls

the diodes are already combined through a cube and im only getting a max out put of 350mw from the diodes, with both pots on the driver turned fully.

i should be able to get much more power.

using the mon pad on the driver and selecting a range of 1ma on the multi meter im getting a reading of 6.5. so i think im correct in saying the driver is only out putting 650ma?? im sure im correct in using this way to measure the out put from the driver?

any help please?

[p1t8ull]

Strange.. a couple of things to double check -

Are you certain J2/3 are both open?
Are the diodes definitely wired in parallel and not series?
Has one diode possibly died?

Also you need to set the multimeter to mV not mA to get the LD current reading via the MON pad, 1mV = 1mA

[Doc]

You probably need about 7v in to the driver.

[andy_con]

Strange.. a couple of things to double check -

Are you certain J2/3 are both open?
Are the diodes definitely wired in parallel and not series?
Has one diode possibly died?

Also you need to set the multimeter to mV not mA to get the LD current reading via the MON pad, 1mV = 1mA

J2/3 are definatly not connected

yes diodes are in parallel

both diodes are working.

yeah i just noticed it should be mv not ma cheers.




different people are saying different things. ive been told i should be using series not parallel and also i need 6-7v not 5v.

im unsure of the max input voltage a standard driver can take?

[andy_con]

also checked the mon pad again. i selected 10v on the meter and got a reading of just under 1v. so the driver mush be putting out 1amp give or take

yet im still only getting 340mw of red light combined

[andy_con]

another update

just change drivers and got the same result, so its gota be something im doing.

[andy_con]

ok been on the phone to robin, he thinks the open can reds have a slightly different make up to normal red diodes.

but in general the driver is running fine, i am loosing 160mw through the cube!!!

so i blame rob so sending me dodgy goods

[mccarrot]

I have done some measuring on the Laserwave PBS.

Before the PBS i have >200mW after pass trough I have 175mW.

This is a approximate transmission of 87,5%

but 160mW loss is almost impossible.

[andy_con]

yeah i checked with a 15mm cube and the losses are small. something is up with this 10mm cube.

its ok though ill sort it with rob.

[mccarrot]

yeah i checked with a 15mm cube and the losses are small. something is up with this 10mm cube.

its ok though ill sort it with rob.

How small is small?