zeldor.biz

Linux, programming and more

Copyright © 2025
Log in

Getting started with arduino

July 10, 2011 by Igor Drobot 2 Comments

Some weeks ago I bought a really cool book – “Getting Started with Arduino”, which was written by the co-founder of Arduino Massimo Banzi.


This little booklet offers a thorough introduction to the [Read more…]

Filed Under: Books, DIY Tagged With: arduino, ATmega168, ATmega328, Book, start with arduino

LED resistance calculation

June 21, 2011 by Igor Drobot Leave a Comment

Calculating LED resistor value, this is very easy and the most of you had this in the school.

A typical LED requires 20 mA and has a voltage of 2 V across it when it is working. The power supply for the circuit could be 9 V – Block battery.

For the right calculation you need three values:
1. Power supply (Your Battery 9 V)
2. LED voltage (2 V)
3. The current flowing (20 mA)
[Read more…]

Filed Under: DIY Tagged With: DIY, LED, Resistance calculation, resistor, Voltage

RGB LED Lamp

May 20, 2011 by Igor Drobot Leave a Comment


It was another great weekend with DIY idea:)
Its a kind of mini lamp for the desk with nice colors.
[Read more…]

Filed Under: DIY, Fun Tagged With: DIY, LED, RGB Lamp

Nagios/Icinga Traffic-Light

April 13, 2011 by Igor Drobot 6 Comments

Nagios and Icinga have a lot of notification opportunities, receive status via Mail, SMS, Twitter or maybe XMPP? Sometimes is it not easy to decide what you really need and what is better for your quick reaction.

If you have more than one monitor it is easy to overlook an important mail, or your mobile phone is in silent mode and you don’t know that you get a critical notification.

If you are a webmaster and you are working a lot with your browser – there is a solution for Mozilla Firefox with terrible wake up sounds – called Nagios Checker for Mozilla Firefox:
[Read more…]

Filed Under: Debian, DIY, Linux, Monitoring, Networking, Ubuntu Tagged With: Icinga, Icinga Traffic-Light, Monitoring, Nagios, Nagios Traffic-Light

LED Music Sync Box

April 12, 2011 by Igor Drobot Leave a Comment

Sometimes in the evening is music great to relax or to hear to it incidentally while you do something.

I combined light with music – no so extreme like in the disco.

I bought some LEDs and a couple of TIP31 transistors. Transistors are the main key to the result! The first test was done on a breadboard.
[Read more…]

Filed Under: DIY Tagged With: 220Ω, DIY, music, resistor, sync led, tip31

  • « Previous Page
  • 1
  • 2
  • 3
  • 4
  • Next Page »
Yeaaah Cookie! We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok