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Monthly Archive: February 2014

Power OFF and ON USB device in linux (ubuntu)

There are two methods of doing this. So first method is for kernels after 2.6.32, and second for older ones. To view kernel version, simply enter:

  find Your USB device, no mather what it is USB flash drive, Yubikey, USB disk drive:

MX backup server with postfix on debian

Not to lose mails when main mail server is down, best solution is – mx backup server. This is configuration to have backup mx server set up and running.

RC car steering solution?

One solution came in mind for RC car steering. Control servo (planned or RC car steering) with potentiometer. Testing setup is very simple. Servo setup: +, – and control pin. Same as here: Simple servo setup Potentiometer will work as voltage divider. Here is more info about it: Voltage divider.

New project idea – RC car

One day thought that would be nice to make a RC car controlled with arduino. Unfortunately I don’t know how make such hardware, I needed to to find any car, that has possibility to turn front wheels to both sides. After few days of searching (all of them were expensive or front wheels were “fixed” they were able only to rotate clock or co-clock wise) found this:

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