Linux cups notifications
I had problems with some printers, sometimes, the print server just stops the queue and I only know when the user complains he can’t print ! This can cause several problems and so, I need to know when a printer stops. CUPS can warning you about that so you can do something about it.
Cups is able to send email notifications when some event occurs .
I’m using CUPS 1.3.7 with CentOS 5.10 x86
Linux screenFetch
screenFetch is a small, but awesome utility that displays the logo of your distro in ASCII ART – with colors, as well some information about your environment. It supports a lot of Linux distributions and there respective logos, most main stream Desktop Managers and a lot of window managers. screenFetch can (and is it’s main purpose) take screenshots with the info on screen ! I think is just awesome and I love ASCII ART !
You can see what options it can take with screenFetch -h
Arduino e LEGO® Power Functions
No dia 10 de junho participei num workshop sobre eletrônica e informática com um projecto baseado em LEGO® Power Functions e Arduino.
Basicamente o projecto envolvia um comboio LEGO® cujo movimento era controlado pelo Arduino. Os objectivos do projecto eram:
- O comboio tinha de parar na estação sempre que lá passava.
- Quando arrancava da estação tinha de se ouvir um apito
- Logo que saisse da estação, o comboio tinha de ser transferido para a linha interior
- Quando efetuasse 2 voltas na linha interior era novamente transferido para a linha exterior
Para elaborar o projecto, para além do LEGO®, foi usado:
- 1 arduino
- 1 buzzer
- 2 sensores de obstáculos
- 1 servo
- 2 leds IR
Para controlar o comboio na estação foi necessário usar dois led´s devido ao alcance e ângulo destes. Um controla a entrada da estação e o outro…
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Arduino SG90 Micro Servo
I’ve just received my Bluetooth Controlled Robot Car Kit and it has a micro servo that needs testing (and I’ve never worked with one before).
L298 Dual H-Bridge Motor driver
The Funduino Tracking Maze also comes with a L298 Dual H-Bridge Motor driver to control the two wheels of the robot. It’s designed to drive inductive loads, such as relays, solenoids, DC and stepping motors. It can also let us drive two independent DC motors, controlling the speed and direction of each one .
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Keyes IR Remote Sensor
My Bluetooth Remote Control Robot kit also comes with a Keyes Infrared remote sensor and a command .
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Keyes IR obstacle avoidance sensor
The Funduino Tracking Maze Robot also comes with 3 IR Obstacle Avoidance Sensors. I couldn’t find any information about it, but i found information about similar ones and give it a try.
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IR Line tracking sensor
The Maze tracking robot also comes with 3 IR Line Tracking Sensors. These sensors just follows lines, or the light reflected on a surface. In the picture above are 3 of those.
Arduino YL-30 SD Card
I’ve bought two Arduino SD Cards modules from DX.com and didn’t found any info for them – So I decided to try by my self.
Reading a bit about Arduino SD cards i found out that Arduino SD card uses SPI (Serial Peripheral Interface) to communicate with the SD Cards and with Arduino UNO (along with others – except Mega) those PINs are 11, 12 and 13.
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Arduino Sensor Shield v4.0
The Funduino Tracking Maze Robot comes with a Sensor Shield v4.0. With all the bundled sensors, a shield is necessary to connect them all.
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