Author: Eliot

1332 Articles

Team Hack-A-Day CNC

May 1, 2006 by 19 Comments

team hackaday dxf

The Team Hack-A-Day forum recently started a thread to discuss homebrew CNC. Computer Numerical Control machining is a very popular topic in our community because of the prohibitive cost of buying a machine off-the-shelf. Searching through the archive it seems we’ve only covered one actual CNC machine; since people have been building these things for so long, it’s hard to come up with the definitive CNC project. We’ve also featured the Etch CNC, designed by the AXIS developers to verify their software.

My coworker Will O’Brien, who writes how-tos for Engadget, recently started working on a new CNC mill. You can expect a write-up on that in the future. Also, Lady Ada recommends Drill Bit City for sourcing cheap carbide bits.

If there is enough interest, Team Hack-A-Day might add another forum for CNC projects.

For those who don’t know: Team Hack-A-Day was founded by Hack-A-Day readers to support our Folding@HOME efforts. Through their work we are now the #37 team (and still gaining) having produced nearly 20 million points in the last 8 months.

[thanks Tired2, op for #hackaday on EFnet]

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Portable Magnetic Card Reader

May 1, 2006 by 56 Comments

portable magnetic card reader

[ned]’s HandySwipe is a portable magnetic card reader. It runs on 4 AA batteries and collects data from track 2 cards. It uses a PIC 16F688 and displays the card’s data on a small LCD. It can store up to 50 cards and dump them in CSV format. It will also output the raw bitstream for use with Acidus’s StripeSnoop. Ned’s project write up is pretty interesting since he covers using a logic analyzer while swiping a card and driving the LCD with only three pins using a shift register.

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Holga Style Digital Camera Lens

April 30, 2006 by 10 Comments

holga

The Holga is a cheap medium format film camera that has achieved cult status for its inconsistent, truly unique photographs featuring blur, light leaks, vignetting, and distortion. Poor quality digital photos aren’t nearly as interesting and [Joachim Guanzon] wanted to achieve the Holga effect without using robotic Photoshop filters. He constructed this lens for his Canon 20D. The base is an EOS body cap with the center drilled out. A tube is constructed from a white film canister and the Holga lens is mounted inside. The tube length increases the usable distance of the camera and the white body lets some light leak in. A lens cap with a 3/16th inch hole is snapped over the top. The hole creates a vignette and since it isn’t permanently attached the pattern will be more random. Check out Joachim’s sample photos.

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Forward RSS Feeds To Your Cellphone

April 28, 2006 by 58 Comments

nextel

[th0mas] has put together a concise how-to on forwarding Atom or RSS to you cellphone. In his example he grabs an Atom feed from his Gmail account then parses it to find the new messages. The new message list is compared to a file so that duplicate messages aren’t sent. All new messages are then sent to the phone’s email address. th0mas has provided enough information so that this script could be easily expanded. It looks like a decent introduction to PERL as well, so even if you aren’t looking to send stuff to your cellphone it might still be worth a look.

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Switch Mode IPod Charger

April 27, 2006 by 33 Comments

switch mode power supply

Usually when someone asks me how to build a USB charger I point them to Jason Striegel’s USB battery v2. It’ll work for a lot of things that only need 5V. Unfortunately [ian] has a 3G firewire iPod so he decided to build a switch mode power supply to generate the 8-30V required by firewire. The device is powered by 3 AA batteries and uses a PIC 12F683 microcontroller to regulate the output voltage. The device can power a dead 3G iPod, but it can’t charge it, so Ian is looking for some input from the community. Some have already suggested using FETs with a lower turn on voltage.

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Old Pen Plotter Converted To Vinyl Cutter

April 26, 2006 by 61 Comments

vinyle cutting plotter

Vinyl cutters can be very expensive, so [vinyl hacker] decided to share with us the alternate route some people have taken. Here is what you need to get started: An old HP pen plotter with a serial connection. A compatible serial cable. A blade holder (Roland blade holders don’t fit). Some Roland vinyl blades. Cutting software like SignGo of DAHEDIsign. Vinyl (found in sign shop dumpsters). The main resource for these plotter/cutters seems to be luberth.com. It’s hard to navigate, but all of the info you need should be there. Now you can cut stickers, stencils, small signs for very little money.

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