How To Convert Christmas Lights to Run on Batteries

Battery Christmas Lights: How to convert Xmas lights to run on batteries/DC 

Just as Christmas rounds the corner the notion of LED Christmas lights shows up on the shelves of popular stores. Those things are juts too inviting not to hack up, eh? I mean you get like 70 LEDS or various colors in pre-wired sockets. How cool is that? The obvious hack is to ween them off from AC power and let them suck on batteries. The hack listed below is pretty much for the always on non-flashing LED or old fashioned incandescent bulb strings but I’m betting that the ones with the cycle controllers can also be hacked. I’ll be doing this in a few days, I’ll let you know how it works out. Try the hack out and have fun bending them to you will. Muhahaha!

Battery Christmas Lights: How to convert Xmas lights to run on batteries/DC (regular or LED)

Blu-Ray Laser Pointer

Blu-Ray pointerI got an email from the boys over at Hacked Gadgets this morning about some horrendous things being done over at Wicked lasers. The laser guys have decided to do a little modding of a brand spanking new Blu-Ray equipped DVD player. They ripped out the laser diode assembly and placed it in an easy to abuse aluminum housing, just the right size to take to parties, shopping, and trade shows, etc. The purple beam (405nM at 23 mW) is bound to make lasting impressions with whomever you blind, er, I mean show it to…

Hacked Gadgets – Making the Sonar Blu-ray wicked laser

Laser safety 

DIY Cintiq LED Drawing Pad

DIY Cintiq LED Drawing Pad

Yeah, so why should you buy high tech toys when you can build your own? This is a very sweet project I hope to see other people try this as well.

"This is hybrid screen/graphics tablet which makes me drool. The price however makes me weep, £2000ish for the 20" version. They also do a thing called the PL at 17" for a more reasonable £500ish. Occasionally they appear on the site in their bargain basement ex-demo section. Still hard for me to justify though.

Then I had one of those "spang" moments. None of the tech involved is new and all is readily available second hand, it’s just a matter of putting it together. My Wacom at work will happily operate with the stylus off the surface, after that it’s just an LCD screen, right? Anyhow where’s the fun in just buying something?

Experiment – what depth does a tablet work to? Stack of paper says 9mm before accuracy starts to suffer noticeably. An LCD with an EL film backlight has to be thinner than that.

So here’s the challenge, What is the least amount of money I can build a Cintiq style device for?

[via MAKE

DIY Cintiq

Homemade Cathode Ray Tubes

DIY cathode ray tubes
First the Sparkmuseum post and now this. What a fantastic month for mad scientists this has been! This has got to be the coolest home brew page I have seen in years.

This guy makes cathode ray tubes from scratch! This has officially buried the needle on my clever meter. Using phosphor from common florescent tubes he coats the inside of a glass tube and evacuates the air. When an electron beam exits a small hole in the discharge tube that is mounted inside the phosphor glows. He has even added deflection coils (magnets) to create an oscilloscope! You can see some videos here, here, and here

His other projects include a photo cell made from salt water and copper , a rectifier made from borax, and even a Homemade Tunnel Diode and RF Oscillator. He also has built his own vacuum tubes. Talk about hardcore!

Hack A Day

Spark, Bang, and Other Good Stuff

Photoplane – Pinhole Camera of the Sky

Pinhole camera R/C rig

Pinhole camera of the skyCruising over city buildings, a small remote controlled plane attempts to hold steady, very steady. With a flick of a switch the ground controller send a signal that commands the plane to activate a small servo. One one thousand, two one thousand. The switch is reversed and the servo returns to its former position. The plane starts it’s decent to the field. What just happened? Would you believe that the plot of the remotely operated aircraft just took a photo of the buildings using a pinhole camera? By using fast film (ISO 1600) Daniel is able to take surprisingly sharp photos. Go have a look at his blog and take a look you might be inspired to build your own.

 

Photoplane-Pinhole

Homemade Wide Angle 4×5 Camera

 

This is a thing of beauty…

"My home-made 6×9 super-wide camera. Rigid-body, 47mm f/5.6 Schneider MC Super-Angulon in a No. 0 shutter. With a Mamiya RB67 back…The helical focusing mount is made by Schneider – the distance scale is calibrated for the 47mm Super Angulons. You can buy the mount for some other lenses too. I scavanged the Graflock adapter and some other bits from an old American 6×9 rangefinder camera called Graflex XL. The rest I fabricated myself at a friend’s machine shop in Richmond. It was inspired by the Hasselblad SWC. To use, it is not as nice as the SWC, but I did some comparison shots, and most people who saw them thought that the SA is sharper than the 38 Biogon." 

[via Make

Home made camera – a photoset on Flickr