Archive for the ‘Photography’ Category

1966 Ford GT40 MKII

Posted by Mr. Leslie Wong On June - 16 - 2013

1966 Ford GT40 MKII

 

HO scale Tomy AFX Mega-G Ford GT40 MkII by Racemasters, 1966 24 Hours of Le Mans second place car driven by Ken Miles and Denis Hulme for the Shelby American Team.

Researchers Unveil A Thought-Controlled Drone

Posted by Mr. Leslie Wong On June - 5 - 2013


Researchers at the University of Minnesota today revealed a drone that can be controlled merely by thought, and that’s not even the coolest thing about it. Published in the Journal of Neuro Engineering, the project has implications in everything from unmanned vehicles to paraplegic mobility.

Story on Popular Science

Sailing – Miami, 1979

Posted by Mr. Leslie Wong On May - 25 - 2013

Sailing, Miami, 1979

 

Sailing – Miami, 1979 (Nikon F2, Nikkor 24mm f/2.8, Kodachrome 64)

Modified Malkoff Devices M60 Drop-in

Posted by Mr. Leslie Wong On May - 15 - 2013

Modified Malkoff Devices M60 with 8xAMC7135 (2.8A) multi-mode driver

Malkoff Devices designs and manufactures high powered LED flashlight modifications for Maglites and Surefire flashlights and their own Malkoff LED flashlights. Their products are so well designed and constructed that they are coveted by professionals that depend on their flashlights and enthusiasts that appreciate their quality.

I bought my first Malkoff Devices M60 drop-in five years ago. The M60 drop-in had a Cree X-RE LED (Q5 bin) and Khatod 6 degree optic. This drop-in output 180 lumens driven at 1000 mA with a 2-3 hour runtime with two CR123 batteries. I wanted to update my M60 with a more powerful driver/LED combination.

In 2008, Cree XR-E LEDs were delivering 220 lumens at 1000 mA. In December of 2012, Cree introduced the XM-L2. Driving the XM-L2 U2 bin at 1000 mA will produce about 412 lumens. At 3000 mA, the XM-L2 will produce over 1000 lumens.

Multi-mode flashlights are more useful for me so I decided to use an 8xAMC7135 (2.8A) multi-mode driver and a Cree XM-L2 (U2 bin). The multi-mode driver has four configuration options, selectable during the build by grounding one of the four “stars” on the rear of the circuit board:

  • Star 1: 5/30/100/strobe/SOS
  • Star 2: 5/100/strobe
  • Star 3: 5/30/100
  • Star 4: 5/100
  • Modified Malkoff Devices M60 with McGizmo McR20J reflector

    Because of the robust nature of the Malkoff drop-in, disassembly is basically destructive. The stock circuit board is potted and the LED MCPCB is securely glued.

    To get the 8xAMC7135 driver board to fit in the Malkoff brass heatsink, I had to slightly reduce the 17mm diameter of the circuit board.

    To solder the LED to the MCPCB, I used a lead solder paste with a SMD hot air rework solder station at 220 degrees C for 40 seconds. After applying some Artic Silver 5 CPU Thermal Compound to the bottom of MCPCB, I glued it to the heatsink with JB Weld.

    After some research on reflectors, I chose the McGizmo McR20J (Joker). A glow-in-the-dark o-ring holds the reflector very securely in the heatsink.

    I compared this mod to the EDCPlus/IS X60L3 Triple XP-G2 LED P60 Dropin. The Malkoff mod has a very nice hotspot while the EDCPlus Triple has a broad floody beam. I like the nice hotspot the Cree XM-L2 produces with the McGizmo McR20 Joker reflector. It also has a decent amount of spill.

    Modified Malkoff Devices M60 with McGizmo McR20J reflector beam shot

    For this beam shot, I converted the original color image to black and white. The drop-in was about four feet (1.21 m) from the wall. On this off-white wall, there is a slight, but noticeable green tint from the beam.

    I put the drop-in in my Surefire C2. Instead of wrapping the drop-in with copper tape, I used some thin aluminum stock as a shim. I haven’t done any runtime tests but after 10 minutes on 100% power, the C2 bezel gets warm but not hot.

    Parts sources:
    Malkoff Devices Drop-ins for Surefire and Malkoff
    Cree XM-L2 LED
    8xAMC7135 driver board at Shiningbeam.com (2.8A) and Illumination Supply (3.04A)
    McGizmo McR20J (Joker) Reflector

    Fog, Bike Ride, Skyline Boulevard, Oakland, CA

    Posted by Mr. Leslie Wong On May - 11 - 2013

    Russian Bear at the Beijing Zoo, 1975

    Posted by Mr. Leslie Wong On May - 4 - 2013

    Russian Bear, Beijing Zoo, 1975

     

    Russian Bear at the Beijing Zoo, 1975 (Nikon F, Nikkor-O 35 mm f/2.0, Tri-X)

    Ship, October 1978, Location Unknown

    Posted by Mr. Leslie Wong On April - 25 - 2013

    Ship

     

    Ship, October 1978, Location Unknown (Kodachrome 64)

    Regina Extra Record Ti Freewheel

    Posted by Mr. Leslie Wong On April - 14 - 2013

    Regina Extra Record Ti Freewheel

     

    I found this Regina Extra Record Ti Freewheel in my bicycle parts box. My friend Kenny bought it in the early 80’s and I used it for a few miles and then put it in the parts box.

    It is a six speed freewheel with 13-14-15-17-18-19 tooth cogs and Italian threading – 1.378″ x 24 TPI. When I recently removed the cogs to clean them, part of the freewheel body looked like it was made out of aluminum. All the cogs are threaded and made of titanium but I was unable to separate the last two cogs (18-19) from the freewheel body.

    When I looked at the freewheel listings on VeloBase.com, I saw a Regina Extra Record freewheel that has aluminum cogs but I didn’t see an Extra Record freewheel with titanium cogs.

    I checked eBay listings for titanium freewheels and there were several that sold in the $250-$500 range. That reminded me of the Steven Spielberg authored episode of Amazing Stories: Gather Ye Acorns.

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    About Me

    I like Alfa Romeos, art, barbecue, baseball, bicycling, cars, cigars, computers, cooking, eating, electronics, fly fishing, football, Formula 1, friends, golf, horology, jazz, movies, museums, photography, r/c cars, r/c helicopters, reading, restaurants, Scotch whiskey, softball, slot car racing, tennis, the internets and travel

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