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High key photo of an old 4D Garrity flashlight. My first try
Strobist: One Neewer TT560 manual 1/8 at background behind the flashlight optically triggered. One YN-565 also at 1/8 35mm right of camera triggered with YN-603N. A car sun protector as reflector on the left
The VPX3101 is Black and Decker's power-pack for the VPX line. It takes the 7-volt lithium pack and produces 120V (at 8 watts) and 5V (at 2.5 watts) for your toys. I ripped the guts out of one and built a flashlight into it.
I captured this shot by hanging a flashlight from the ceiling with a string, setting my camera on a tripod looking up. I set the camera to BULB, turned off the lights, started the flashlight swinging, and hit the shutter.
This kid invented a tri-colored flashlight for use by pilots, with each color having a specific use. Instead of the usual "guy holding an object" photo I decided to add a bit of motion by having him do circles with the flashlight while switching between the colors (red, green, white). This was a simple two light setup, with the main light being shot through a small snoot to light only his upper torso, and a rim light with a blue gel to prevent his head from disappearing into the black background. I think the exposure was about 20-seconds with the flash popped manually about a third of the way into the exposure. That delay allowed me to get a more natural look to his hand it made it's way across his body.
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Wenn das Blitzgerät auslöst, wird es hell.
There will be lots of lights when the flash unit is triggered.
Decided to take apart a solar powered dynamo flashlight to see whats inside.
Basically what it has is a cheap electric motor (connected to the battery along with some diodes, then a few gears which allow the hand crank to turn the motor and thus generate power.
The solar panel is soldered onto the same traces as the battery and has no diodes
The LED's are not regulated so the brightness will drop along with the voltage (which seems to top out at around 3.5V. There is also no charging circuit so it may be possible to overcharge the battery.
The solar panel does charge the battery but after using the hand crank to bring the battery to 3.4V, aiming a bright lamp at the solar panel yielded no additional voltage even after an hour. (bit it was able to charge the battery enough to give some light after running it down (so it seems that the solar panel no matter what, is not able to fully charge the battery (it would probably need a DC to DC boost module in order to charge the battery fully).
Overall the flashlight is of a decent brightness and can run for around 15-20 minutes before needing a recharge using the hand crank. (Or if you want, you can run it non stop at a low brightness level if you have a bright light source aimed at the solar panel (perfect for if you like using a flashlight in direct sunlight :) )
Easy to disassemble. Only unscrewing the tail cap is required to replace the single rechargeable Lithium battery cell shown here - a very commonly available 18650 size. All segments are sealed with rubber o-rings to keep water out if riding in heavy rain. The rings at the base of the lamp head are heat sinks to minimize temperature built up from the very hot LED emitter.
Flashlight weight = 185 grams
You just gotta view this one large!
This is the first in what I'm going to call my "flashlight spider" set. So named because the pictures are the result of me walking around at night with a flashlight, finding spiders, then using the light from the flashlight to see enough to get focus. It's not easy balancing a monopod and working a flashlight, but it is loads of fun!
For this shot, I used my Canon 300D with attached tamron 70-300mm 1:2 macro and the Nikon #5T achromat lens.