ITead mystery PCBsITead mystery PCBs

Posted on 2012-10-17 by Vladimir Smotesko

I have received two random PCBs from ITead along with my display PCBs. Sadly, this boards have no addresses, nor understandable names. Maybe, they are intended to work as a part of larger system, so have no value when are alone.

Here’s the scans of this boards. I hope someone will recognize them:

Big pixel TWI display PCB arrivedПлата для Big pixel TWI display

Posted on 2012-10-16 by Vladimir Smotesko

Big Pixel TWI display is my experimental project. It’s a 12×11 LED matrix driven by amazing AS1130. The display should be controlled via I2C (TWI) interface. In the next post i hope to show it populated and working.

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BreadBoard-styled ProtoBoard with SOT23 footprint

Posted on 2012-07-10 by Vladimir Smotesko

I have designed a prototyping board with SOT23 footprints for transistors. Would send gerbers to Seeed for production.

Inspired by Adafruit Perma-Proto.

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Installing Altera Quartus II Web Edition 12 in Ubuntu

Posted on 2012-06-17 by Vladimir Smotesko

Problem

I ran into a problem when installing Altera Quartus (it’s development environment for CPLD): after unpacking the archive installer’s interface does not appear:

$ ./altera_installer.external.sh
Creating directory bin
Verifying archive integrity... All good.
Uncompressing Altera Installer...............................................................................................................................................
./setup: 35: ./setup: Syntax error: "(" unexpected

$ ./altera_installer.external.sh

Creating directory bin

Verifying archive integrity... All good.

Uncompressing Altera Installer...............................................................................................................................................

./setup: 35: ./setup: Syntax error: "(" unexpected

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How to install Oracle Java 7 in Ubuntu 12.04

Posted on 2012-06-07 by Vladimir Smotesko

From an Launchpad repo:

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

sudo add-apt-repository ppa:webupd8team/java

sudo apt-get update

sudo apt-get install oracle-java7-installer

If you already have OpenJDK installed — delete it previously.

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Motion sensor with TTL output

Posted on 2012-02-18 by Vladimir Smotesko

I bought a couple of IR motion sensors from Sunsky and going to tell you how to handle them and how to make motion-activated LED lamp.

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Cookie Time To Live in PHPMyAdmin

Posted on 2012-02-13 by Vladimir Smotesko

If PHPMyAdmin logouts you too early — you have to increase cookie’s TTL by adding



		
		
			
			
Shell
			
			$cfg['LoginCookieValidity'] = 84600; // 24 hours 
			
				
					
				
					1
				
						$cfg['LoginCookieValidity'] = 84600; // 24 hours

at the end of config.inc.php

Zend Studio/Eclipse: error 'Workspace is currently in use'

Posted on 2012-02-13 by Vladimir Smotesko

Если при старте Zend Studio/Eclipse получается ошибка «Workspace is currently in use by another Eclipse» и предлагается выбрать другой воркспейс — нужно удалить файл .lock в воркспейсе и Эклипс запустится.

If Zend Studio or Eclipse tells ‘Workspace is currently in use by another Eclipse’ at startup and proposes to select another workspace — just remove .lock file in your workspace and it will be fine.

Wake on LAN and Nvidia MCP51 network problem

Posted on 2012-02-13 by Vladimir Smotesko

forcedeth driver for nvidia network interfaces has a bug: WoL does not work. Problem is in reversing MAC-address. So, if machine’s MAC is 00:24:21:dd:1f:90 then use following command to wake it:

etherwake 90:1f:dd:21:24:00

1	etherwake 90:1f:dd:21:24:00

Don’t forget to enable WoL in BIOS and add

ethtool -s eth0 wol g

1	ethtool -s eth0 wol g

to /etc/rc.local

imagemagick and animated gif

Posted on 2012-02-05 by Vladimir Smotesko

Once i needed to have a crop and resize image functionality in a project. I was to deal with animated GIFs too. Discovered a issue with imagemagick: you can’t just say

convert -crop 100x100+20+50 1.gif 2.gif

1	convert -crop 100x100+20+50 1.gif 2.gif

and get cropped image area.

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I tech

Web developing, electronics, linux hacking.

ITead mystery PCBsITead mystery PCBs

Big pixel TWI display PCB arrivedПлата для Big pixel TWI display

BreadBoard-styled ProtoBoard with SOT23 footprint

Installing Altera Quartus II Web Edition 12 in Ubuntu

How to install Oracle Java 7 in Ubuntu 12.04

Motion sensor with TTL output

Cookie Time To Live in PHPMyAdmin

Zend Studio/Eclipse: error 'Workspace is currently in use'

Wake on LAN and Nvidia MCP51 network problem

imagemagick and animated gif