October 2, 2013 /
With the advances of shrinking technology it’s becoming more and more easier to roll your own every day items. Ever thought of making your own watch ? Sure you have, it was probably going to turn out larger than you anticipated too huh? How’s 1.5mm thick sound ? Sounds pretty good to me too. Zak has a really awesome writeup of him rolling his own watch.
The display is a 0.96″ OLED display (128×64 pixels), it uses a DS3231M RTC, 2 LEDs, a buzzer, a 3 way switch and runs off of a 150mah LiPo battery. Impressive! Features of the software include, window animations, up to 10 alarms, games, stopwatch, and flashlight mode.
Power consumption numbers are decent too. 6ua in sleep mode, and 10ma with normal on. That means depending on how much time you spend with the screen on will dictate how long your charge will last. This puts you anywhere between 15 hours and 3 years. With those sort of numbers and a modest use of your watch you should be able to get 15-30 days out of a single charge.
The Schematic and source code are available on Zak’s web site, a long with more photos of the build. Enjoy a video and a few more pics after the break.
September 18, 2013 /
Admit it, you still love LED throwies, everyone does! So does David. After viewing an article on very low power LED fireflies by Karl Lunt, David decided to build the project (and does a good job of documenting the process to reproduce it). The LED fireflies use the LED as a photosensor to detect when there is light so it knows when to go to sleep, thus by saving power by not doing anything with the lights on.
The build works off of a CR2032 coin cell battery, and everything is dead-bug soldered together. The microcontroller is an ATTiny13a which is already a low power microcontroller, but by using the LED as a light sensor periodically, the microcontroller knows when to sleep and doesn’t wake up until the light level changes below a threshold. This allows the firefly to last a really long time on that single coin cell.
David added a little spin on the original by wrapping it in a waterproof enclosure (à la sauce container) and a magnet (so it can be a throwie). This looks like a fun build.
Source code can be found on Karl’s site. David’s writeup can be found here. Video after the break.
September 16, 2013 /
Bocho came up with a really neat controller for RGB LED strips. The idea is to compliment a VJ performance, full of knobs and sliders of course. Something that you can tweak in real time, but can also be assisted by the music. Bocho started out with this post on bass detection on Arduino, which was then rolled into the controller.
The build uses 3 high power transistors for controlling current, and various pots and sliders that control oscillation speed, luminosity, hue, and selecting manual or beat detection all controlled by an Arduino. Even better the project is wrapped in a decent looking enclosure.
Source code is available here. Full writeup here on bocho’s blog. Enjoy a video demonstration after the break. (more…)
September 13, 2013 /
Security researcher Silvio put together his process for defeating a cheap infra-red based security system. The security system uses an infra-red remote to arm and disarm the alarm. The alarm is triggered by any motion that happens while it is armed.
In his first attempt he tried to use an off the shelf learning remote to record the signal and play it back. For whatever reason the remote didn’t like the signal and didn’t even try to learn it. So in his second attempt, he whipped out a frequency counter and an oscilloscope and was able to replicate the signal using an Arduino and an infra-red LED. For fun he also made a third attempt using a more hacker friendly open source board called a USB Infrard Toy made by Dangerous Prototypes.
A good read if you want to learn the process of simple reverse engineering. Full article here.
August 28, 2013 /
[su_quote]… it runs over AVRs microcontrollers and include all the libraries and drivers required for a complete a distributed intelligent network, it also includes an Android user interface.[/su_quote]Ever wanted to make your home smarter ? Or just remotely control basically everything in your home ? Souliss is here to help. It’s a framework for DIY home automation.
What I like about Souliss versus having used traditional home automation hardware (like Z-Wave) is you aren’t restricted to what modules are available. You can craft your own using a lot of familiar hardware like Arduino’s (and I’m sure Raspberry Pi’s in the future). It’s not restricted to specific methods of communication either, you can do wired or wireless or wi-fi or serial or whatever you can use to get your devices to communicate. Great project!