Teme: Besplatni programi | Radio-amaterizam

Better Syncing Windows With Atomic Time Server

You may have need to have accurate time on your Windows PC. Windows already does have support for network time server synchronization and with recent versions ti should be set and turned on by default meaning if PC has access to Internet it will synchronize its internal clock with some of the world atomic clocks.

However, it might be good enough as synchronization is set to rather infrequent time periods, one day or even whole week. For some purposes it is needed to have clock synchronized more frequently. I need it for working Amateur Radio digital modes.

There are number of third party applications that can be installed on Windows PC as SysTray applications or services and allow more precise time synchronization. […]
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Teme: Događaji | Radio-amaterizam

Radio Amateurs in War

Symbol of defense of Yugoslav people became global symbol of resistance to NATO and USA terror all over the World.

March 24th. Year 1999. The very end of the 20th Century. With the nightfall strange sounds were heard in the sky and at 19:45 – explosions. Bomb fell on Yugoslavia, small sovereign country in Central Europe.

One word is on everyone mind – WAR!

Yugoslavia was attacked by NATO military alliance led by United States of America, the country Yugoslav people always considered as one of the best friends. At first, people were fighting mixed feelings caused by unjustly accusations, vicious attacks and betrayal of considered friendly and ally countries and disbelieve that what happens is at all possible as that was act against international law. […]
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Teme: Beleške

Svetla grada

Svetla grada

I ove noći na Starom gradu
sedim opet sam,
svetla grada, novog grada
posmatram.

I sve je isto kao nekad
sad se podsećam
svetla grada, istog grada
al ne bih sam.

Svetla grada prešla su
svetlosne mnoge godine
a ove moje,
još uvek stoje
na zidu iste gradine.

U koji grad je otišla
gde li je sad?
Svetla grada, našeg grada
seti li se kad? […]
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Teme: Samogradnja

ESP8266 Temperature and Humidity Web Service

After I successfuly tested HTTP server using Arduino and Ethernet Shield, I decided to try to accomplish the same thing using wireless connectivity. I decided to use ESP8266 on NodeMCU board. That is microcontroler with wireless interface all in one package, and quite low priced which makes it interesting for various purposes.

ESP8266 is supported within Arduino IDE which is big plus, as one can use the same development environment.

Soon I realized that popularity of this platform is well earned. It was very easy to set it up. Most of the trouble is setting up Arduino IDE to compile and upload to board. […]
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Teme: Samogradnja

Arduino Temperature and Humidity Web Service

I needed simple device that is able to measure temperature and make it available for collecting that info from remote places via Internet. Arduino platform was the first thought and it ended up as expected: nice and simple.

For hardware I used Arduino UNO, Ethernet Shield and DHT22 Temperature and Humidity sensor.

Ethernet Shield pinpoint matches Arduino UNO so it is simply attached on top of it. It provides RJ45 connector for ethernet connection and SD card socket which I did not need for this small project.

All pins on Ethernet Shield are pass-through which means all Arduino pins are available on the this shield too. […]
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Teme: Radio-amaterizam

Namena radio-amaterskih repetitora

IARU REGION 1 – PRINCIPI PLANIRANJA VHF, UHF I MIKROTALASNIH OPSEGA

FM repetitori su namenjeni kao komunikacioni servis mobilnim radio/amaterskim stanicama (uključujući i ručne stanice). Po potrebi, mogu biti instalirani i za poboljšanje dostupnosti stanica u planinskim područjima.

Oni nisu namenjeni da omogućuju DX veze, stoga njihov domet u uobičajenim uslovima propagacija treba da bude ograničen.

Broj instaliranih repetitorskih stanica treba da bude određen prema
– potrebama za regionalno pokrivanje
– očekivanom broju korisnika

Ne treba da bude ustaljeno da se FM repetitori upotrebljavaju kao kanali za ćaskanje za fiksne stanice. To se kosi sa njihovom namenom.

Izvor: INTERNATIONAL AMATEUR RADIO UNION REGION 1, VHF MANAGERS HANDBOOK, Version: 7.0. […]
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Teme: Društvo

Građani drugog reda u sopstvenoj državi

Država Srbija od preduzeća zahteva da svaki zaposleni koji koristi neradne po osnovu verskih praznika, mora da da izjavu kojom se o tome izjašnjava.

Evo kako izgleda dokument koji svaki radnik mora da potpiše, inače preduzeće čekaju visoke kazne.

izjava_o_verskim_praznicima
Sama ova ideja je nespojiva sa zakonom koji ne dozvoljava da se od bilo kog građanina Srbije zahteva da se izjašnjava o svojoj verskoj pripadnosti.

Međutim, ovde se ide i dalje. U stvari se samo od pravoslavnih zahteva da se izjasne. Katolici i pripadnici drugih hrišćanskih religija, jevreji i muslimani se ne izjašnjavaju o svom verskom opredeljenju. To se traži samo od pravoslavaca. […]
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Teme: Radio-amaterizam

Osvojena diploma Servantes

4O/YT9TP Cervantes SilverUnija radio-amatera Španije je 400 godina smrti španskog pisca Miguela de Servantesa obeležila diplomom Servantes. Za vreme odmora u Crnoj Gori, radeći u portabl uslovima, održao sam dovoljno veza sa radio-amaterskim stanicama aktiviranim specijano za ovu priliku da osvojim ovu diplomu. […]
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