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  1. djQUAN

    Dual color custom host 520nm and 635nm rebuild - merge my two lasers into one

    **I also could have put this in the red lasers section but I like the 520nm green a little more. ;) Having nothing much to do during lockdown, I tore apart my two old lasers which both used cheap flashlights and broken lasers as hosts. I got tired of carrying several lasers on outdoor trips so...
  2. djQUAN

    Revived my PL450B pen laser build from many years ago

    I made a pen laser circa 2012-2013 powered by AAAs or 10440 cell and forgot about it in my pant pocket a while back and it took a bath with the laundry. Forgot about it for a few years then saw it dismantled with the diode and driver which survived the bath, waiting to be built into a new laser...
  3. djQUAN

    Another DIY Tripod

    I needed a way to hold my Flir E4 when monitoring something during testing etc. Looked around for low cost solutions but the cheap tripods are either too small, too flimsy or both! I decided making my own would be the way to go. This is not exactly a step by step instruction on how to build...
  4. djQUAN

    DX - Universal 30M Visibility Safety Warning Red Laser Tail Fog Lamp

    I did a quick search and this doesn't appear to have been discussed before. I saw this on my facebook feed and I don't see anything good coming out with this idea :undecided: Universal 30M Visibility Safety Warning Red Laser Tail Fog Lamp - Black - Free Shipping - DealExtreme To be safe, the...
  5. djQUAN

    Anyone getting this ad?

    Suddenly LPF added an extension (NNewSaver)to my firefox and this now pops out everytime I open an LPF page. I removed the extension and this still pops out. Anyone getting the same thing? I wasn't getting this before and it started just within today.
  6. djQUAN

    DIY DC millivoltmeter

    There have been times that I needed to measure very low voltages (millivolts and sometimes down to microvolts) and my multimeter is a typical autoranging type with 1mV resolution which isn't good enough. When I'm measuring low voltage drops across high current shunt resistors or contact points...
  7. djQUAN

    Experimental: Remote solid state lighting

    Since I have a need to place lighting in far away places, I usually tap off the renewable energy system at home and run a long length of cable to the place where light is needed. Running long wires is a pain so I thought, laser might be a possible substitute. Here's a proof of concept that I...
  8. djQUAN

    Cheap automotive HID ballast teardown

    I have this defective ballast from dad's car. It came with his newly purchased used car and the HID drop in kit probably cost around US$40. The lamp blinked and this ballast made an arcing sound so I replaced it and that fixed his lights. I decided to look inside out of curiosity and was...
  9. djQUAN

    High current bench power supply

    This is not laser related but I just wanted to share my latest project. I needed a high current power supply when testing car amps so I looked around for options. Bench supplies more than 10A are very expensive. I saw the RC guys use this Dell server power supplies for their hobby chargers so I...
  10. djQUAN

    I blew my Ophir head.

    The way I had my LPM wired is that there's a BNC jack that can double as a signal output for external data logging, or as an input to use as a voltmeter. Well, long story short, the switch was in LPM mode and I applied 13V into the jack. Ended up blowing the Ophir head circuit inside. Here it...
  11. djQUAN

    How to post pictures in this forum (lotsa pics)

    I did a quick search and didn't find a tutorial on how to post pics so I decided to make one. Also, there are places (like my work) that some hosting sites are blocked so I can't see the pics posted by other users. Our forum Laserpointerforums has its own image hosting space per post (but only...
  12. djQUAN

    My new LED workbench lighting

    I have been using those dual 12" white CCFL lamps (used by PC modders) as my bench lighting for a few years. I recently realized I needed more light for precision work. I had a spare LED assembly that I made but never got around to installing in a room so I used it here instead. Attached it to...
  13. djQUAN

    Make your DIY LPM display more stable

    First, I would like to note that this won't work in all types of DIY LPMs. I just happened to stumble upon the solution in a certain type of digital panel meter. I have seen this panel meter get used in many Ophir LPMs since it is a 5 digit meter and has a decent accuracy. The cause of the...
  14. djQUAN

    520nm 100mW Spikey

    Here's my latest build. (It's Christmas vacation - no work! so I have a lot of free time :) ) I started with a block of aluminum to make a heatsink. I don't have a lathe so this is how I make round stuff on a mill. I use the dividing attachment and rotate it by hand while gradually letting...
  15. djQUAN

    190mW 635nm single mode rebuild

    So I had my green cheapie I bought from china many years ago and the green module inside started mode hopping and eventually failed so I decided to reuse the host and turn it into a medium power single mode red :) Here are some pics I took during the rebuild. Disassembled the host: Drilled...
  16. djQUAN

    3.1W 9mm 445 fan cooled handheld

    The design is not yet final but here are some stuff that I have finished. :) I started with a heatsink from FT (link) and machined it to accept a 12mm stubby module from DTR. I like this new module (haven't seen it before) It makes good contact to the back part of the 9mm diode for better...
  17. djQUAN

    How to make Magnetic battery connectors

    Magnetic battery connectors allow you to temporarily attach wires to new/untabbed/unusual size batteries without soldering. I use them to connect hobby RC chargers or other electronic stuff to cylindrical rechargeable batteries. You can also use magnets and just stick alligator clips to them...
  18. djQUAN

    My HID bicycle light

    I actually made this a few years ago but haven't taken much pictures. I had the chance to take some updated ones the other day so here they are. :) Uses the typical 35W bulb/ballast combo used for cars. For power, I used 18pcs of Sony 18650 Li-ion cells but those didn't last long so now I'm...
  19. djQUAN

    Interesting dot photo (1.4W 445nm diode)

    Since my 1.4W handheld has a momentary button and switches the driver to standby with the key switch on and button unpressed, It drives the laser diode at about 15-20mA so we get an LED effect as an "aiming beam" when burning. I've seen this before but didn't think about taking pics until now...
  20. djQUAN

    My Surface mount Pick and Place Gear

    I've used the tweezer method most of the time but when I went building about 100 LED strip boards (each board has 8 1206 size resistors and 24 Osram PLCC LEDs) I needed a faster method. Since I'll be simply having two kinds of parts, I made a simple dispenser from acrylic. Machined it to hold...




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