Teme: Radio-amaterizam

Fast hand writing for receiving Morse code

Receiving Morse code is a challenge. It is achievable and there are operators that reached stunning skills of receiving Morse Code in very high speeds. One of the limitations is hand writing speed, thus most high skilled operators receive Morse Code „in head“. But sometimes you do have to write it down, right?

First helping technique that should and is learned along with learning Morse Code itself is optimal hand writing. This cuts number of strokes for each character which speeds up writing. Also it is important where strokes end to minimize movement between written characters.

This image shows one of the ways to optimize hand writing. […]
[ ... vidi ceo članak ... ]

Teme: Društvo | Radio-amaterizam

Radio-amateri od RATEL-a dobijaju pretnje izvršiteljima

U drugoj polovini 2019. godine radio-amateri su od RATEL-a dobili obaveštenje da je RATEL doneo odluku da promeni iznos naknade za korišćenje radio-frekvencija za radio-amatere. Iznos je sa dotadašnjih 10 dinara podignut na 1000 dinara. Da,  dobro ste pročitali – uvećanje od samo 100 puta!

Ovim su radio-amateri dobili izuzetnu zahvalnicu za sav svoj rad na tehničkom obrazovanju mladih i sve svoje humane aktivnosti u vanrednim situacijama.

Naročito je interesantno da je RATEL obavestio da je ovu promenu uveo retoraktivno za 2018. godinu.

Obaveštenje je sadržavalo poziv radio-amaterima da se izjasne da li se slažu sa ovom odlukom a nisu ga ni dobili svi radio-amateri. […]
[ ... vidi ceo članak ... ]

Teme: Društvo | Za to ste glasali

Izborni fenomen 2020

Srbija je uvek bila zemlja čuda pa se tako u 2020. godini za izbore pojavio se novi fenomen. Niz opozicionih stranaka je odlučio da ne izlazi na izbore i uputili su otvoren poziv građanima na bojkot, to jest neglasanje.

To je interesantna pojava jer situacija na političkoj sceni je postala takva da su sada opozicione, a nekada vrlo jake vladajuće stranke dospele u nemilost građana i mnogima je postalo pitanje da li uopšte mogu da prođu cenzus a kamoli da ostvare neki značajan rezultat na izborima. Iz tog ugla realno je da ne izađu na izbore i tako izbegnu bruku.

Ove stranke kao osnovni razlog neizlaska na izbore navode loše izborne uslove. […]
[ ... vidi ceo članak ... ]

Teme: CNC / 3D print

Traffic (street) signs (3D print)

These are 3D models of various shaped traffic signs i did for my son.

Poles are separate from sign tables for easier printing. Once printed sign snaps on to pole. You may glue it but it is not necessary.

Sign height including pole is about 65 mm.

Intention is to print sign stickers on paper in color and glue them to the sign tables.

You can get models and more details from https://www.thingiverse.com/thing:4394933.

 […]
[ ... vidi ceo članak ... ]
Teme: CNC / 3D print

eBox Filament Dryer Storage Box User Guide

eSUN eBox is multifunctional filaments storage box. It has three functions:

– Heating and drying filament

– Moisterproof and dustrpoof storage

– Weighting filament

After I misplaced User Manual i found ut it is not available for download nowhere on the Internet. If you end up in the same situation here it is: Download eBox User Guide […]
[ ... vidi ceo članak ... ]

Teme: CNC / 3D print

Knob with knurled surface for CNC 3018 X and Y axis (3D print)

I stumbled upon model for bolt and nut with knurled interface https://www.thingiverse.com/thing:9095. I liked how it looks so I decided to adjust nut model and make it to become hand wheels knob for my CNC 3018 X and Z axis. It turned out pretty good.

Knob radius is 24 mm and thickness is 10 mm. It is meant to be used on 8 mm lead screw so it has 8.1 mm hole which is big enough that knob tightly sits on leading screw so it can easily turn leading screw.

There are holes for 3 mm screws if there is need to additionally secure knob on the lead screw.

 […]
[ ... vidi ceo članak ... ]