Month: September 2013

OpenRemote: Open Source Home Automation Platform

OpenRemote is a nice way to automate your home using low cost solution and open-source.

It is not dependent of any protocol but interfaces with many solutions.

See this demonstration video:

Update: You can find a documentation tutorial here: http://www.openremote.com/wp-content/uploads/2013/12/How-To-Smart-Home-PDF-OR.pdf

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Sending Bluetooth Low Energy data from Nordic nRF24L01+

What a great hack this one from Dmitry Grinberg!

It is amazing to know you can use these cheap nRF24L01+ dongles to communicate (unidirectional unfortunately) with a Bluetooth 4.0 Low Energy (BTLE) devices (your smartphone for example).

In fact the nRF24L01+ doesn’t connect to you BTLE device, but sends data using the “unsolicited advertisements” channels. Not a big problem if all you need is a network of sensors because sensors just need to send data anyway.

VIA: http://hackaday.com/2013/09/21/sending-data-over-bluetooth-low-energy-with-a-cheap-nrf24l01-module/
SOURCE: http://dmitry.gr/index.php?r=05.Projects&proj=15&proj=11.%20Bluetooth%20LE%20fakery

Using a USB/Serial converter as Arduino programmer

I got a wearable Lilypad Arduino but didn’t get the programmer, unfortunately this board doesn’t come with ISP programmer as other full size Arduino boards.

Fortunately I found two sites explaining how to do it using an ordinary Prolific PL2303 USB/Serial programmer.

This guy did a “reverse engineering” to discover how to hack a Nokia cable as Arduino programmer:
http://www.kwartzlab.ca/2010/04/reverse-engineering-cheap-ardu/

This post show an easy way to do the same thing:
http://forum.arduino.cc/index.php?topic=137772.0

Crie um Telao usando Raspberry board

Se você está pensando em colocar um telão na sua casa, uma vez que sua TV de 60″ já não impressiona seus vizinhos e amigos, então seu problemas podem ser resolvidos com este projeto:

http://www.piwall.co.uk/information/10-create-your-own-gpl-movie-piwall

Este projeto usa o ffmpeg (atual avconv) para fazer a mágica acontecer.

Lembro de ter feito um telão em 2002 (esta lá no meu curriculo lattes: http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4772792P6), na época utilizei 4 placas de video com aceleração 3D (AMD Radeon) ligadas no barramento PCI de um computador e configurei o X Server para utilizar a extensão Xinerama. Funcionava muito bem para rodar o Desktop KDE, porém o desempenho para exibir vídeo era sofrível, provavelmente pelo fato do driver de vídeo não usar a aceleração do hardware.

English Figure of Speech

This post will be updated often to list some (not so) common figures of speeches used on English language:

B:
Bite the bullet – aceitar algo difícil e conviver com isso
Blown away – encantado
Break a leg: com boa sorte.

C:
Cold feet – perda de confiança

D:
Drain the Swamp – to exterminate something that is harmful

F:
Faux-pas: deslize.

G:
go off the boil/gone off the boil – lose interest in something/some project.

H:
Heading there – vamos pra lá, vamos lá (lugar físico)

M:
Makes no bones about: não esconde; deixa claro

R:
rolling in dough: muito rico(a) ; alguém com muito dinheiro pra gastar

S:
Sweet spot: ponto certo

T:
To this day: até hoje
Tongue-in-cheek: refere-se a uma frase que não deve ser levada a sério, expressão humorística, etc.

W:
Way to go: Congratulations, good job!
Wears the pants = quem manda (she wears the pants = ela quem manda)

LibriVox project – Free Audio Books

If you are looking for audio books because you are lazy to read it yourself or just because you want to improve your language skills then you need to know the LibriVox project. This is volunteer project where people read books and release the audio file for anyone download and listen, just for free (as in beer and as in speak as well).

Imagine you are learning Chinese or Japanese, but you don’t know where to find texts and audios to read and listen, using LibriVox you get both!

Site: http://www.librivox.org

Analyzing IR protocol – the easy way

I was used to LIRC connecting the photodiode on serial port, but these days serial port is rare and using an USB/Serial adapter boring.

Then this guy got a crazy simple idea to analyze remote control protocols. He extended the idea of software oscilloscope (using audio input) to infrared analyzer.

He implemented it on Delphi and release the source code:
http://ostan.cz/IR_protocol_analyzer/

Kudos for you Ondřej Staněk!