lasersbee said:
Hey alx...
at 700mA... what is the duty cycle (ON to OFF time) of your
driver in a standard Aixiz module without extra heatsinking... :-?
Jerry
Hi Jerry,
If is not tested in the real life, the test will not be relevant. Personally, i don't have a laser diode to work as higher currents without overload the diode. So we will have some limitations because we want to protect the diode. Now, I am using a mixed heatsink (ax/dx case+small flashlight case, joined together) for cooling a LPC-815 red diode driven at 420mA. In this way, I didn't registered any deprecation regarding laser beam and also the heat is dissipated very well using around 60 seconds on/off duty cycles (cannot be felt by hand). So, I mean that just powering the driver and using a dummy load, will not be probative ...
I know what is inside, and all components shoud resist at higher degrees. Also I know that newer SONY diodes, REQUIRE ANYWAY DUTY CYCLES. But this diodes are still very expensive. So, being warned, i redesigned the circuit, to support this diodes, without having it!
Anyway, if you have time (more than me) and want to test it more, PM me your details, and i'll be willing to ship you one driver for free! I tested and will work without problems with actual laser diodes (red/blue).
Regards,
Alx
PS: and please all that claim something or not. I build this driver in benefit of lpf community. THE GOAL IS NOT TO COMPETE WITH SOMEONE HERE. IS TO HAVE (all of us) ACCESS TO A CHEAP small driver to better serve our needs. This driver, DOES NOT REPRESENT A BUSINESS FOR ME IN ITS NATURE. I like the idea and after analyzed it, i saw that is whole gap here and we have chance to have it ... I loved a little this challange, till start to cost me money... Now, seeing reactions of some posters, i'm not convinced that worth this effort. Also, all information residing here are public and serve all of us. I think i mentioned on my first post, that i don't want to reinvent the wheel. All I've done was to put a little effort to give you, something which may help. I like to ship to everybody for free... Unfortunately, It cost money to produce it, so, cannot be free... but, maybe will be cheaper! Personally, I'm not likeing to talk without substance. Due to that, i didn't start a thread here till this driver become real. Now, i am working on another project (405nm AR coated glass lens). I hope to be able to announce that is real too (when the lens will be in my hand)... I don't want to speak now, more about ... I will let you know, when will be... if will to be!