Parts: LM317 Adjustable Voltage Regulator

September 22, 2008 by Ian 35 Comments

Every project needs a power supply. As 3.3volt logic replaces 5volt systems, we’re reaching for the LM317 adjustable voltage regulator, rather than the classic 7805. We’ve found four different hobbyist-friendly packages for different situations.

A simple voltage divider (R1,R2) sets the LM317 output between 1.25volts and 37volts; use this handy LM317 calculator to find resistor values. The regulator does its best to maintain 1.25volts on the adjust pin (ADJ), and converts any excess voltage to heat. Not all packages are the same. Choose a part that can supply enough current for your project, but make sure the package has sufficient heat dissipation properties to burn off the difference between the input and output voltages.

Continue reading “Parts: LM317 Adjustable Voltage Regulator” →

Changing The EEEPC 701 Form Factor

September 22, 2008 by Caleb Kraft 8 Comments

Over at the EeeUser forums, [PvP_lostnight] is designing a kit to convert your EEEPC to a different form factor. He is modeling the design after the Samsung Q1 UMPC. The kits will eventually be for sale, but as you can see from the pictures, there’s a long way to go. He seems to be taking lots of input from the forum members, so go there and help him make it perfect.

[thanks Tony]

Broken LCD TV Turned Into A Light Table

September 22, 2008 by Caleb Kraft 24 Comments

[Steve DiRaddo] sent us this sweet little mod. After obtaining a free LCD TV that had a cracked screen, [steve] immediately tore it open to re purpose it. The end result was a computer controlled light table with audio. From what he says, it is very very bright due to the fact that it has 16 CFL tubes behind it as opposed to the usual 2 inside a PC monitor. The TV had a bult in RS232 command port. Whith some quick hacking, he was able to control power, channel, input, and volume via his laptop.

Xbox 360 Laptop In Progress

September 21, 2008 by Eliot 7 Comments

[Ben Heck] posted and update on a project he’s doing for THQ. This latest Xbox 360 laptop is being built as a contest prize. It’s based on a 60GB Xbox 360 and is slightly larger than the previous laptops. It can accommodate a standard 360 hard drive without modification. An Xbox Live camera is included as well.

We hadn’t realized how many Xbox 360 laptops [Ben] had built. There’s the original. The one he built as a how-to for Engadget. Then, the one based on an Elite and now this.

Real Time Gas Monitoring

September 21, 2008 by Eliot 12 Comments

With the weather getting colder, [Daniel] decided it would be a good idea to monitor how much energy his gas heating was using in real time. He used a Nokia 6680 cameraphone to monitor the heater’s flame through the sight glass. PyS60, a Symbian implementation of Python, checks the image sent by the camera and measures how much blue flame is visible. These values are stored in a SQL DB on the phone that can be polled over Bluetooth. At the end of the billing cycle, he’ll be able to correlate the amount of gas used with what the phone reported.

[Thanks, florent bayle]

Direct To Garment Printing

September 20, 2008 by Eliot 32 Comments

[youtube=http://www.youtube.com/watch?v=f3iOuKzhUlQ]

Reader [deren lik] pointed out the world of direct to garment printing to us. You can purchase commercial machines that will print directly onto a t-shirt using inkjet technology. Unfortunately, these machines cost ~$10K, so hackers have decided to fill in the gaps. DIYDTG hosts plans for how to build your own DTG printer. Their standard instructions are based around the Epson C88 printer. A custom carrier is constructed and then the printer components are bolted on top. Commercial DTG printers are also based on Epson parts and you can easily purchase the garment inks even if you didn’t pay a premium for your printer.

DaScratch Multitouch DJ Interface

September 20, 2008 by Eliot 5 Comments

Stanton has released a new controller peripheral for laptop DJ’s. DaScratch is a USB connected MIDI device designed to emulate record interactions. It features a large touch area where the user can make scratching, sliding, and button pressing motions. The compact device has presets for software like Traktor, Serato, and Ableton Live, but can work with anything that supports MIDI. Multiple units can be paired together using magnets.

As the video below shows, there are quite a few different interactions possible. We really want to see a teardown of this device though. We get the distinct feeling that it’s designed to look more impressive than the underlying hardware actually is. Continue reading “DaScratch Multitouch DJ Interface” →