Drilling precise grids without a CNC machine can be tough to pull off. [Ookseer] has come up with a nifty method for dilling aligned holes with a drill press. He uses a right-angle jig on a Dremel drill press with stacks of business cards as spacers. The same number of cards is added between the substrate and the jig to space each new hole evenly. This method comes in handy when drilling grids in an enclosure for speakers, temperature sensors, or for an aesthetically pleasing design.
Full Spectrum Engineering has offered up a tutorial for their inkjet direct PCB kits that repurpose direct-to-CD capable inkjet printers (such as the Epson R280) to print etch-resistant ink straight onto copper clad board. This is easier and less error prone than some iron-on methods, especially for two-sided boards. Just print (no need to reverse the design), dry on a hot plate or in a toaster oven for a couple minutes, and your board’s ready for etching!
Concerned about gunking up your nice inkjet with non-OEM ink? You can dedicate hardware to the job without breaking the bank. Many of the compatible printers are of the “free printer after rebate” bundle variety that can now be found inexpensively on Craigslist or eBay.
These Tweezers are pretty cool tools for anyone doing SMD components. We tried them out and found them very pleasant well made. They are able to identify components and take readings easily with one hand. One thing they are missing, however, is the ability to measure voltage. The people over at Openschemes decided to see if there was a way around that. As it turns out, the chip used in the unit already has the capability to measure voltage. They take us through the process of modding the unit to be able to take advantage of this un utilized feature. From the outside, the only difference is a new switch to set the mode to voltage. Great job guys.
[via Hacked Gadgets]
In an effort to simplify his interface, [danwagoner] cobbled together this push potentiometer. It utilizes a potentiometer mounted directly above a push button with a spring mounted around it. This way the user has only one item to deal with. They can twist the knob and press down on it to push the button. We love seeing people come up with ways of creating their own items instead of buying something. This was fairly inventive and reminds us of the LED buttons we saw back in January. Great job [danwagoner].
Generation 2.0 of RepRap, the self replicating 3d printer, is approaching realization. Code named “Mendel”, the new design will be wedge shaped rather than a box which offers a few benefits. The overall design is smaller than the original RepRap but the printable area is larger. This means more functionality with less building material. With each new generation of this project the assembly gets easier and total parts price drops making the RepRap available to a much wider audience.
The RepRap blog has put forth some design specs, a picture of the assembled prototype, and has links for general assembly information (ZIP). We won’t see a finished version of this released for a few months but so far it looks like a big leap forward.
[nmcclana] has posted an assembly walkthrough for an Arduino-style prototyping board for the 80 MHz, eight core Parallax Propeller Microcontroller. While not board compatible with Arduino shields like the ARM-based Maple board we covered, it does have that familiar layout, and provides access to all 32 I/O pins, and the 3.8″ x 2.5″ footprint was kept in mind to allow easy creation of shields modules that can be designed using ExpressPCB’s miniboard service. The Platform Kit also has the advantage over other Propeller kits such as SchmartBoard’s offerings, which require soldering of surface mount parts. Kits are available at Gadget Gangster, and ready for your next design that needs a little more sauce than the Arduino can offer.
A bench vice can be one of the most used tools in your workshop. For those that don’t have a workshop [Matt] built a vice that clamps to a table. He used scrap wood, MDF, threaded rod, washers, nuts, and wing nuts. Cheap, easy to build, and very useful!
[via Toolmonger]
