Johnson's Techworld

What is Digital Mobile Radio (DMR)? Digital Mobile Radio, known in short as DMR is the digital counterpart of conventional analog radios. It uses Time Division Multiple Access

What is DATV? DATV stands for Digital Amateur Television. Amateur television was initially in the form of SSTV or Slow Scan Television. Due to the higher level of

What is SDR and webSDR in amateur radio? In my younger days when I was a very active amateur radio operator, the state of the art was a

What is an Inverted V Amateur Radio Antenna? Inverted V antenna is very popular among radio amateurs, especially the beginners, as it is very easy to put up

More on Arduino Nano Basic facts about Arduino Nano was discussed earlier. Arduino Nano is the smallest in the group with breadboard friendly design. It has pin headers

Arduino Nano is a small microprocessor which is breadboard-friendly. It was released in 2008 and has 30 male I/O headers with DIP-30 like configuration. DIP means Dual Inline

My thoughts on homebrewing Amateur Radio HF Rig I was very active on the band and an ardent homebrewer in my younger days as I could not afford

Geostationary Amateur Radio Satellite Most of the amateur radio satellites are deployed in low earth orbits (LEO) so that they pass above you more than once a day.

My initial thoughts on how to work Amateur Radio Satellites I have been toying the idea of working Amateur Radio Satellites ever since I got my callsign way

How to become a Ham Radio (Amateur Radio) operator in India? Any citizen of India above 12 years of age can become a ham by qualifying in the