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Recent content by cosmonaut

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    My 520nm Convoy S2+ Build

    Yeah, the problem was that the wires attached to the leads bent too far when screwing it together test fitting everything. Oh well. If anyone knows what DTR uses for pressing diodes into the big 20mm heatsinks that would be great. I feel like a standard diode press wouldn’t work. I think I’d...
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    My 520nm Convoy S2+ Build

    Whelp, I snapped a lead off the diode assembling it. Now I’m out a fair bit. I’m a little upset but I suppose I could just get a press and put in a new one.
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    Can anyone help identify this cheap laser?

    Nope, it's not a focuser knob. Just a little screw-on ribbed heatsink-looking thing. I think I might gat the department to either invest in some nicer 532's or even 520's because those might work better in the cold at night. I do happen to have some old pen drivers though, just laying around...
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    Can anyone help identify this cheap laser?

    My school bought a couple of these cheap green lasers for our observatory which bear no mark of a manufacturer. Someone happened to break the driver off of the diode and now we have no idea where it is. I was thinking of putting in a new driver I had laying around, but I don’t even know the...
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    My 520nm Convoy S2+ Build

    Hi LPF, I know there are tons of 520 builds out there but I'd just like to share what I've been up to. My build isn't complete since I'm waiting on a few more parts to arrive in the mail (a battery contact board and thermal adhesive) but for the most part, it's been going well. I'll also share...
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    How does a laser power meter actually work?

    Hi LPF, I've been wanting to gauge the output performance of my new diode with a LPM. I have access to a power meter in the optics lab of the physics department here at school, however it is only sensitive to HeNe wavelengths and this is a green diode. Instead, I figured a fun project would be...
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    Can someone help me understand driver specifications?

    I've been looking through the commercial driver route (as opposed to the DIY approach) but I think I'm a little lost. Honestly, I'm a physics major so electronics should make sense to me but I've never had to focus on powering laser diodes. Basically, I was thinking of doing a custom build with...
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    Does anyone still make low mA drivers?

    Ooh, I might have to go with a Flexdrive in that case! I am wary however as the output voltage is hovering just above the operating minimum for the diode. Is it entirely possible the voltage could drop below 5.5v if the battery voltage dips slightly? In that case I would imagine I could power it...
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    Does anyone still make low mA drivers?

    Since this is boost/buck, I can run it either below or above the operating voltage of the laser, correct?
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    Does anyone still make low mA drivers?

    I've been looking at the stickies and it looks like a lot of drivers offered my LPF members are out of production. I'm building a pen with an Osram PLT5510 diode which operates between 60-100mA at 5.4-7V, but most drivers I've found offer anything from 100mA and up, which is not ideal because I...




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