tech
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.
Motion sensor with TTL output
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Continue reading Cookie Time To Live in PHPMyAdmin
If PHPMyAdmin logouts you too early — you have to increase cookie’s TTL by adding
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$cfg['LoginCookieValidity'] = 84600; // 24 hours |
at the end of config.inc.php
Zend Studio/Eclipse: error 'Workspace is currently in use'
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
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:
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etherwake 90:1f:dd:21:24:00 |
Don’t forget to enable WoL in BIOS and add
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ethtool -s eth0 wol g |
to /etc/rc.local
imagemagick and animated gif
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
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convert -crop 100x100+20+50 1.gif 2.gif |
and get cropped image area.
ubuntu + nvidia
If you can’t install nvidia driver in ubuntu (nvidia-glx-180 get installed but does not activates in the ‘Hardware drivers’, and X tells ‘Failed to load the NVIDIA kernel module’ after reboot) — you have to install ‘linux-headers’ package corresponding to your kernel version. E.g. if your newest installed kernel is linux-image-2.6.28-15-generic then you need linux-headers-2.6.28-15-generic
Deal is ‘linux-headers’ must be a dependance of ‘nvidia-glx’ but is not somehow.
flac2mp3
I have written a simple bash-script to convert a directory of FLASs to MP3:
Uplink load balancing + channel checking
I have set up balancing of two internet uplinks, as read in LARTC. It works great, but in case of channel failure all connections that belong to that channel becomes dropped and does not restore because of route caching. To solve this problem, i have written a script that does testing of channels by pinging.