Recent content by boost_dependent

I'll, attempt this soon. I have college classes bombarding me right, so maybe this weekend. If I can keep the LD as a dummy load then do I still need to use the 4 diodes as a load? Or will the dead LD work as the load? Also, seeing as I now have no more LD's, where is a good place to get some...

do you have a good picture of this test you are talking about? I want to make sure I do it correct. So, I would be removing the LD and not having it connected during the load test? What about the resistors, diode and cap in the circuit? Are they used during the load test?

You mean I have to go and solder 4 more diodes in series just to measure the current? What exactly is the - output of the driver? Here are better pics 12ft away full power 4ft away full power

well, I guess I shouldn't have cropped the pics. Makes the dot look better I guess. Yeah it's dim. There is only about a night and day difference from when I had it hooked to the breadboard and then on the PCB.

Pics? Yeah, they were posted already. No one said anything about them though.... My soldering killed the diode? Hmm I doubt it. I touched the diode pins for all of a sec. with the iron. I even heat shrunk each lead of the diode. Load? ummm I just went in series to obtain the mA

yeah, I'm using 4 N batteries. With the pot at highest resistance I am reading about 45mA. With the pot at its least resistance I am reading about 247mA. And 1.25V between vout and adj.

ahh, I was measuring with the laser off. When I have the laser on and measure I get 1.25V

well, if the laser is supposed to operate at 2.85v (or something around that?) then wouldn't you see 2.8v and not the Voltage of the batteries? I hooked the resistors up correct now and still I do not see any voltage by reading between the heatsink and Adj pin. I only see voltage if I go to...

why 6 batteries? I thought all I needed was 6V ?? 4 1.5v batteries = 6V are you saying I need 9V??? then why not just use a 9V battery? yeah, I'll try and reposition the resistors when I get a chance.

I haven't changed the resistors to the correct way yet. I'm not sure how you want me to get the ref voltage. I tried going from the heatsink to the adj pin and it didn't read anything. The only way I can read V there is to go from ground to one of the 3 pins. Power had 5.95v, vout had 5.55, and...

so, what would the outcome be of the 2 variations you just listed?

here are the pics of the dot. Sorry I couldn't hold the beam exactly steady on some of them. This is about 4ft away with the pot turned to full resistance. h ttp://farm3.static.flickr.com/2106/2190862918_4c01f837a8_o.jpg 4ft away pot turned down all the way h...

Re: 2 diodes, both dim? This is on the breadboard, and it worked great! Very bright dot!! h ttp://farm3.static.flickr.com/2189/2188116155_d99a23a503_b.jpg FULL SIZE: h ttp://farm3.static.flickr.com/2189/2188116155_ff0f932227_o.jpg -------- All these had really really dim dots h...

Re: 2 diodes, both dim? the forum won't let me post links.....?!?!? Man, I got about 8 good pics of my setup but the forum won't let me post them?

Re: 2 diodes, both dim? Well, I tried hooking up the last one I had. I checked for voltage at the cap and there was like 1.5v, so I shorted a wire to both leads? I touched across both leads, checked for voltage and nothing. Checked for mA and nothing. I reattached the diode hooked everything...