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  1. RA_pierce

    Build & Review: 57X nm Module from TinkerTavern

    A while back I received a couple 570 nm laser modules from TinkerTavern. This thread is dedicated to a review of the module and showcasing some details of the build. The Module I didn't select one of my two modules for this build with any prior knowledge of how it performs. Both were tested...
  2. RA_pierce

    Another custom host for a 502nm module

    Hi everyone. I'm making my biannual appearance to share a "quick" build. Several months ago I earned a PhD in evolutionary biology from my research on speciation genomics. I ended up getting a job in Montana, which is a big change from Southern California. I haven't had much time to catch my...
  3. RA_pierce

    DIY RaspberryPi Spectrometer - PySpectrometer review

    Some of you may know that Les Wright developed software for a RaspberryPi spectrometer. I've just completed building and calibrating mine. I'm very happy with this project and thankful for Les' great work. Build Summary: I used PySpectrometer 2 software to build a visible light and...
  4. RA_pierce

    Resolved - TinkertavernCo Ghosting me after purchase over 1 month ago

    @tinkertavernco I hope you see this and can make it right in a reasonable time. Timeline: December 17: I place an order with tinkertavernco for 2 573 nm modules. I purchase promptly via PayPal as requested. tinkertavernco kindly offered a small discount for the purchase and even offered to...
  5. RA_pierce

    Upgraded 593 nm laser - custom host and glass optics

    Thanks for looking at my latest creation. When the 593 nm modules became available, I snagged a few, immediately put one in a chrome pen, and inspected the modules to assess their potential. I noticed that the collimator is plastic, which makes it a static dust magnet and is easily scratched...
  6. RA_pierce

    LaserBee 3.7W USB Laser Power Meter

    I picked up a new LPM during Jerry's sale and I am very pleased with the addition of this new tool. Thanks, Jerry! @lasersbee I purchased this model for the data logging capability. It's really convenient for keeping records and I really like the ability to make plots of power over time. As...
  7. RA_pierce

    The unexpected 593.5

    Who would have guessed an extremely rare wavelength would just magically appear within reach? Here's a place to compile our information and photos. I'll start: I got a couple of these 593.5 nm modules. I plan to make a special host but for now I slapped one into a chrome pen (the quick and easy...
  8. RA_pierce

    A fresh look for my 589 nm Laser

    I've had a 589 nm CNI module for a few years. It's an amazing little laser and although it's output power is relatively low at ~30 mW, the color is one of my favorites. A couple years ago I purchased a manual milling machine and have spent much of my free time learning how to use it. I have...
  9. RA_pierce

    Laser diodes in series or parallel?

    My reading suggests that laser diodes need to be run in series in order to achieve a balanced load across both LDs, so as not to overdrive one and underdrive the other - with catastrophic results. This may not be so much of an issue if the diodes are similar (same substrate and electrical...
  10. RA_pierce

    DIY spectrometer and 633nm diode

    This weekend I decided I would measure the wavelengths of a few lasers I have. Using a diffraction grating, some scrap plywood, and spare hardware, I assembled a simple setup for measuring the wavelength of any visible laser. Construction: A 1.15 meter length of plywood was drilled to hold 4...
  11. RA_pierce

    Hand-made Aluminum-Bronze host & 561 nm laser

    Here's my latest project: a 561 nm laser installed in a hand-made aluminum-bronze host. When I say hand-made, I mean I formed the host from stock using hand saws, files, abrasive paper, and tapped the threads by hand. The only power tools involved: drill press and belt sander. Here are some...
  12. RA_pierce

    M462 diodes - Where did they go?

    Does anyone know what happened to the M462 diodes? These were my favorite of the multimode blues but I didn't buy enough of them. My last one was accidentally smushed during an act of brutal negligence. I've looked high and low but they seem to have disappeared. If anyone has a spare or two...
  13. RA_pierce

    Sneak peek of a 561 nm project

    Normally I will post when a project is complete but I'm excited to have the electrical work done (just some simple wiring of components) and wanted to show it off. Its a 561 nm module from SuckPit doing about 3 mW. The laser is pulsed. Its going to be installed in a hand-made aluminum-bronze...
  14. RA_pierce

    589 nm Cu-Ni & Ti Host

    Last year I ordered a 589 nm laser module from CNI with plans for something special. Those of you who know my work will know I generally prefer to build simple pens. However, I have lots of plans for more unique designs. My main limitation is the work space and tools needed to produce them...
  15. RA_pierce

    Review: 2W 405 by thanhtung

    When I saw the thread, I had to have it. I took a look at the diode characterisitics and thought, "finally, a multimode diode with a respectable divergence angle." Yes, that's right. A multimode violet laser capable of close to two Watts out the barrel and low (relatively) divergence. Now, the...
  16. RA_pierce

    685nm and 690nm laser diodes

    I have been looking for some interesting red wavelengths to add to my collection. 685nm diodes can be found on eBay at ~15mW but I would like more power than that. During my search, I stumbled upon these: 685nm 50mW 690nm 35mW Just thought I'd share in case anyone else is interested. I may try...
  17. RA_pierce

    WTB LPC-840 diodes

    Hi, everyone. I'm looking for two LPC-840 diodes. It seems they are the best since the 815s years ago. I prefer not to order from China. Does anyone in the USA have a couple spares they are willing to part with?
  18. RA_pierce

    Optically corrected pen: MM 638 V1

    I've been planning this project for a long time but finally had some time to get around to setting it up today. The idea: Make a tiny, optical correction assembly to improve the beam quality from high power multimode diodes while minimizing losses and cost. The materials: HL63193MG 638nm...
  19. RA_pierce

    NEEDED: Custom Brass Lens Holder

    Hi, everyone, especially machinists offering their services. I am in need of a brass M9x0.5 lens holder designed for a lens with a diameter of 4mm. The design is simple since I will use adhesive to set the lens in the back of the holder (the side facing the diode) since it needs to approach the...
  20. RA_pierce

    Feeler: Universal Laser Labels *Photos Added*

    Hi everyone. I have been testing out some products to make custom laser warning labels and found a source that I think provides a good balance of quality and low cost. These labels are 1" x 1" with rounded corners printed on clear vinyl with a strong adhesive that can be removed easily with no...


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