Inexpensive Powerful Router Based Robot

October 7, 2008 by Caleb Kraft 10 Comments

[Andrey Mikhalchuk] Has posted some great instructions on how to build an inexpensive router based robot. Starting with a Linksys WRT54GL, he takes us through the process of disassembling and modifying it to directly control servos. He has put together a custom version of OpenWRT Linux that you can download from his site. After testing to make sure everything is functional, he goes through a quick and dirty chassis build. As you can see from the picture above, there are lot of household items thrown in there such as rubber bands and zip ties. After adding a camera mounted on two servos for x y movement, he fine tunes it and lets it go.

This project looks fairly simple, cheap, and fun. It may look familiar as it is very similar to our Wifi Robot post from August.

[thanks Matt]

Use A PSP As An Extended Display

October 6, 2008 by Caleb Kraft 20 Comments

Follow along with this project and you could use your PSP as a display for your computer. The software, available for download on the site, gives you a 960×544 display. The data is compressed, sent to the PSP, then decompressed for display. Though that sounds clunky, the video after the break shows it working pretty smoothly with some Winamp visualization. Only 32 bit Windows XP or older is supported currently.

Continue reading “Use A PSP As An Extended Display” →

AVR ATtiny25 USB Hit Counter

October 5, 2008 by Jason Rollette 6 Comments

[Bob] has a USB page hit counter that uses an ATtiny25 to run a MAX7219 which drives eight 7-segment displays. It is easy to implement USB on an AVR using just firmware, eliminating the need for any USB to RS232 conversion. The host software is written in Delphi and sits in the Windows tray. The code examples seem simple enough to expand upon into your own display programs.

Hack A Day Is Always Hiring

October 3, 2008 by Eliot 14 Comments

We’re always looking for people to contribute posts daily and help expand the site. We’ve added a handful of contributors in the last couple months, which you can see in our new How-tos.

This is a paid, freelancing position that requires professionalism, consistency, and reliability. We want to hear from people that are passionate about software/hardware hacking and growing Hack a Day. To apply, send the following to jobs@hackaday.com

A short bio about yourself
3 example daily posts written in the style of Hack a Day
3 software or hardware how-tos you’d like to see. For examples of work we’ve done in the past, look here, here, here, and here.
A couple sentences on how you would improve the site either through features or content
Any additional reasons why you would make a good fit for Hack a Day

Do not send any attachments. Having your own blog you can show off is a definite plus.

[photo:fbz]

Animated LED Eyes For Halloween

October 3, 2008 by Caleb Kraft 5 Comments

[Matt Daughtrey] sent us this sweet little project he’s doing for Halloween. He’s building some animated LED eyes. He says that the whole thing is 3 individual LMDriver platforms, another project he’s working on. There isn’t any info available about that, but he does expand a little. He states that each display module uses an Atmega169 with some heavy multiplexing. The eyes really don’t look that impressive sitting on the bench, but watch the video to see how cool they really are.

We noticed that the back of the boards appear to have http://www.embeddedether.net on them. Unfortunately that site seems to have been grabbed by a domain squatter.

How-to: Networked Graffiti Wall

October 2, 2008 by Ian 22 Comments

[youtube=http://www.youtube.com/watch?v=G8KprTVbHD4]

Wondering what we did with our web server on a business card project from last week? It’s powering a giant LED graffiti wall. Animations can be user-submitted using the online designer. You can watch a live feed of user animations as well. The online interface runs on the Google App Engine for maximum scalability and resilience.

In today’s How-to we cover all the ins and outs of building your own networked graffiti wall. Continue reading “How-to: Networked Graffiti Wall” →

Amazingly Cheap Dual Channel Scope

October 2, 2008 by Caleb Kraft 20 Comments

[Jacques] sent us this little project he has been working on. It is an amazingly cheap USB 2 chanel scope. The total cost of the project was around 5 Euros. It is based off of an Atmel Tiny45, has 2 analog inputs, and can supply 5 Volts to a breadboard. He has listed the bill of materials as well as downloads for the source code, plans, and display software.