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Final Key

Remembering passwords is a pain, and there’s a number of devices out there to make it easier. If you’re looking to roll your own, this guide to building a Final Key will walk you through the process.

We talked about the Final Key before. It’s a one button password manager that encrypts and stores your password. It acts as a virtual serial port for configuration. When you hit the button, it becomes a keyboard and types in the correct password.

The creator has no intentions of making this a commercial project for a number of reasons. Instead, easy build instructions are provided based on the Arduino Pro Micro. The 24LC512 EEPROM can be soldered directly to the Arduino by bending out the DIP legs. A few resistors, a button, and an LED finish off the project. The last step is to fill it with hot glue to prevent tampering.

The Final Key firmware is available on Github, and the case can be ordered from Shapeways. If you’re interested in hardware password management, you can also check out the Mooltipass which is being developed on Hackaday.

[Thanks to Lars for the tip!]


Filed under: Arduino Hacks, security hacks
ping-pong-ball-machineFriction wheel mechanism, frame made of VEX Robotics Design System components.

Read more on MAKE

Stino IDE

If you’ve played with an Arduino, you’ve probably been frustrated by the IDE. It works, but it’s not the best editor. It’s especially painful for bigger files and larger projects. The Stino plugin for Sublime Text aims to solve this issue by bringing the full functionality of the Arduino IDE to the Sublime Text editor.

Sublime Text is a powerful text editor with support for most programming languages. What it’s missing is support for compiling and uploading code to an Arduino. Stino bridges that gap. Sublime is a commercial product, and retails for $70 USD. However Sublime does have an indefinite trial period, so Stino can be evaluated for free. Stino itself is an open source plugin written in Python, and you can contribute to the project on Github.

After installing Sublime and Stino, you point the plugin at an Arduino install folder. It then allows you to build and flash directly from the editor. For anyone who’s been frustrated with the Arduino IDE, this looks like a slick solution.

[Thanks to Matt for the tip!]


Filed under: Arduino Hacks

Stino IDE

If you’ve played with an Arduino, you’ve probably been frustrated by the IDE. It works, but it’s not the best editor. It’s especially painful for bigger files and larger projects. The Stino plugin for Sublime Text aims to solve this issue by bringing the full functionality of the Arduino IDE to the Sublime Text editor.

Sublime Text is a powerful text editor with support for most programming languages. What it’s missing is support for compiling and uploading code to an Arduino. Stino bridges that gap. Sublime is a commercial product, and retails for $70 USD. However Sublime does have an indefinite trial period, so Stino can be evaluated for free. Stino itself is an open source plugin written in Python, and you can contribute to the project on Github.

After installing Sublime and Stino, you point the plugin at an Arduino install folder. It then allows you to build and flash directly from the editor. For anyone who’s been frustrated with the Arduino IDE, this looks like a slick solution.

[Thanks to Matt for the tip!]


Filed under: Arduino Hacks

Fan de ce style depuis pas mal de temps déjà, c’est ma première réalisation concrète. L’idée était de réaliser un (joli) thermomètre d’ambiance, histoire de savoir quelle température il fait dans la pièce. J’avais déjà réalisé un thermomètre à tubes Nixies, mais ce dernier avait deux défauts : les tubes n’étaient pas centrés sur le pcb, et il consommait un peu trop pour avoir envie de le laisser allumé en permanence (et en plus, il n’était pas « habillé »…).

Du coups, la première étape de cette réalisation a été de refaire un pcb complet. Pas simplement déplacer les tubes, j’en ai profité pour alléger le tout, histoire de supprimer les composants qui n’étaient pas nécessaires. En effet, sur la version précédente, j’utilisais un NE555 pour générer les impulsions nécessaires à la haute tension. Désormais cette tâche est réalisée par le microcontrolleur lui-même.

Schéma thermomètre Nixie

Schéma thermomètre Nixie

Quitte a devoir reprogrammer le microcontrolleur pour rajouter la génération de la haute tension, j’en ai profité pour tout ré-écrire en avrc. Ca me permet d’avoir un timing très précis, autant sur la génération du signal HT que sur le multiplexage des tubes. (La fréquence est importante pour la génération de la haute tension car elle joue pour beaucoup dans le rendement). Mon code aurais pu être grandement optimisé si j’avais un peu mieux réfléchi à mes branchements, mais sur ma version, je m’étais trompé sur certaines liaisons (ce qui expliquera les fils visibles sur les photos). Le schéma proposé corrige ces erreurs.

tarthermomètre nixie (AVRC)

 

Thermomètre à tube Nixie Steampunk

Thermomètre à tube Nixie Steampunk

Pour l’habillage, je me suis fait un peu plaisir. Les deux « chapeaux » sont en laiton, que j’ai tourné, moitié façon meca, c’est à dire en utilisant le tour de manière traditionnelle, moitié à main levée à l’aide d’une lime (pour les arrondis notamment). Le reste de l’accastillage est composé de différents tubes de laitons, diamètre 5 et 3mm, que l’on trouve facilement en magasin de modélisme.
Le tube est quand a lui un tube de plexyglass acheté pour l’occasion.

Socle vu de dessous

Socle vu de dessous

Le socle a été tourné dans un beau morceau de chêne, par un ami car je ne disposais pas de tour à bois, et le tour à metal n’est vraiment pas adapté à ce genre d’opérations. Le plot du milieu est assez profond pour que le tube laiton soit bien maintenu, mais ne va pas jusqu’en bas pour pouvoir laisser passer les fils. J’ai repris ensuite le socle tourné pour le fraiser afin de fixer le connecteur d’alimentation, et fait les 4 perçages nécessaires (2 pour les tubes verticaux, un pour le capteur de température, et un pour le connecteur d’alim).

Détail du capteur de température

Détail du capteur de température

Le capteur de température utilisé est un LM35. Pas particulièrement esthétique donc. Pour le masquer, je l’ai donc glissé à l’intérieur d’une douille de 22lr qu’un ami tireur m’a gentiment fourni. Le capteur est fixé à l’intérieur à la colle à chaud.

En fonctionnement

En fonctionnement

 

Scrolling LED on soda can

Wearable, lightweight hacks have long been dominated by the Lilypad. This will probably change with the introduction of the Printoo. Using printable circuit technology, the Printoo takes a modular approach to enable hackers, makers, and engineers alike to construct flexible circuits that can be put on almost anything, including paper!

Powered by the all too familiar ATmega328, the Printoo core module is fully compatible with the Ardunio IDE. The modular design enables functionality with several other printed devices including displays, batteries, sensors and even LED strips to make many different projects possible. One of the most interesting modules is the 1.5 volt, 500 micron thick electrochromic display.

Be sure to check out their Kickstarter, which has a nice video that demonstrates the project. If funded, they will be available in October in case you want to get your hands on one. Or feel free to make your own. Just be sure to let us know if you do!


Filed under: Arduino Hacks, wearable hacks

FBPCCKMHTJPA22G.LARGE

Jan_Henrik @ instructables.com writes:

In this project i want to show and explain you a range sensor with ultrasonic and a 20×04 lcd screen. I wrote the code for this project myself and added lots of comments, so that everybody can understand it and use it for other projects (maybe a light range sensor?!). It is easy to build and much more easier to program, it just requires a few cheap parts and can run on battery, for a portable rangefinder.

The maximum rated range is 500 cm, the range is measured 20 times per seccond. It is Displayed on a lcd screen which is 20×4 chars big, it has a custom start message, and it can have a custom design while measuring. It will have a backlight LED and can run on every arduino, which has I²C communication. That mean you can run it on an Arduino nano, which is very small. It also requires 5V so it has to be a 5V version of an Arduino.

Arduino ultrasonic range finder - [Link]

FB262DPHA4LGEKS.MEDIUM

smching @ instructables.com writes:

Use a ATTiny85 (can be ATTiny45, ATTiny44) to make an Arduino just for US3.00 and name it as Tiny Arduino.

Tiny Arduino have only eight pins as shown in figure above, Pin4 is ground (Gnd), Pin8 is 5V (Vcc), Pin1 is Reset, Pin2 and Pin3 originally used to connecting the Crystal. In order to utilize all the IO, the internal oscillator (RC Oscillator) is used to replace the external clock which require a crystal. Therefore the Tiny Arduino is now come with five IO. Below shows the Arduino IO functions.

Simplest and Cheapest Arduino - [Link]

LIN bus signal injector

[Zapta] tipped us about his latest project: a LIN bus signal injector. For our unfamiliar readers, the LIN bus is a popular automotive bus that is used to interface with buttons, lights, etc. As [Zapta] was tired of having to press the Sport Mode button of his car each time he turned the ignition on, he thought it’d build the platform shown above to automatically simulate the button press.

The project is based around an ATMega328 and is therefore Arduino IDE compatible (recognized as an Arduino Mini Pro), making firmware customization easy. In the car, it is physically setup as a proxy between the LIN master and the slave (which explains the two 3-wires groups shown in the picture). It is interesting to note that the injection feature can be toggled by using a particular car buttons press sequence. The project is fully open source and a video of the system in action is embedded after the break.


Filed under: Arduino Hacks, hardware
apr
17

FLKLUX6HTK2J358.MEDIUM

Do you need a quick and easy way to program AVR chips. Did you know you can use your Arduino and the Arduino IDE? This Arduino shield makes the process much easier.

Arduino AVR Progamming Shield - [Link]



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