While building some nixie clocks,[Blue_Metal] ended up destroying a few tubes. He found that having a tester sitting around would have been most helpful. Taking some pride in his tools, he put some major effort into building his nixie tube tester. It is quite visually pleasing, featuring hand cut brass framing, custom etched information panels. Scroll through his flickr set to see the build process in detail.
[Alan] noticed that his external hard drive was getting quite hot to the touch after a few hours. He says that it was probably designed to handle the heat sufficiently, he thought it would be fun to beef it up. He’s using a pic 12f675 microcontroller as the brain and an LM35 temperature sensor. The Fan speed is varried in 8 steps from 35 degrees C to 45 degrees C.
[Ytai Ben-Tsvi] wanted a rapid prototyping tool that could be easily and cheaply built at home. He came up with the PICMAN, a breadboard compatible PIC based board that has everything you need to get the ball rolling. He’s using a PIC18LF4553 which has built-in USB support that can be used with a bootloader for programming. The board also features a voltage regulator for non-USB power sources, some indicator LEDs, a user-defined button, and a reset button. The chip is on the underside and a combination of through-hole and surface-mount parts make for a one-sided PCB that can easily be etched using the toner transfer method. You will need a PIC programmer to burn the bootloader firmware the first time but once that’s done this becomes a self-contained package.
[youtube=http://www.youtube.com/watch?v=NbOlG7THecM]
Thinking of buying a new bandsaw? Stop it. Make one instead. Not only could you save some money, you could customize it to be exactly what you need. There is a step by step breakdown of the entire construction with tons of great pictures. He even has some great info for general bandsaw use if you’ve already got one.
[via makezine]
[Luciano] didn’t want to drop a lot of cash into a flux and solder paste applicator so he built his own for about $5. He re-purposed a hot glue gun which you can usually find at a dollar store. After removing the heating element he inserted the body of a syringe. The plunger has been modified to use a knitting needle inside of some plastic tubing. After taking the picture above he made an improvement by adding a milliliter scale to the plunger, allowing you to meter out the paste and also gauge how much remains.
[Riley Porter] has been working on several different custom enclosure designs. Above, you can see his Proto Desk which holds a breadboard, Arduino, and has two recessed boxes with sliding tops for components and patch wires. He’s got a miniature version that gets rid of the breadboard, as well as slick-looking cases for the Bus Pirate, tinyISP, and face plates for word clocks.
Well, if you’ve got a laser cutter you should be using it right? We’ve seen [Riley’s] wares in the past; he wrote the guide for laser cutting solder stencils.
[Thanks Brian]
[youtube=http://www.youtube.com/watch?v=Jznl8U9zzKM]
Need to monitor not only if a fan is running, but if it is running fast enough? Check out this PC fan failure alarm circuit. After several failed attempts using various circuits, they settled on a Schmitt trigger. They even show a couple variations including a manual reset and a relay instead of a buzzer.
[via HackedGadgets]
