Author: Johnson Francis

RTL-SDR is a low cost software defined radio dongle which can be connected to the computer and needs a software installed in the computer. Though some SDRs like

Simple way in which anyone can receive the SSTV images from International Space Station using the WebSDR (Software Defined Radio tunable from the web interface) at Goonhilly Earth

I was not getting good SSTV pictures from the WebSDR at Goonhilly Earth Station, even after timing well and receiving strong audio signals during SSTV transmission. It was

For picking up SSTV signals from Space Station, you have to find the time when the space station is over the Goonhilly Earth Station. Method was described in

This question was asked by a viewer on my YouTube channel. Most WebSDRs cover only HF. There are a few which cover VHF including 145.800 MHz, the frequency

In August 2024 I had posted about New FTX-1F Announced in Tokyo Ham Fair. Today I received an email from the local dealer from whom I had purchased

This is the reading from ATU-100 antenna tuner when 40m antenna was tuned for resonance using the external antenna tuner. It is displaying the capacitance value and inductance

Demo of connecting Arduino Uno to a computer using a USB type B to type A cable.

Demo of Compiling and Uploading Sketch to Arduino Uno for NEMA 17 Stepper Motor Control. Uploading New Sketch available from https://circuitdigest.com/microcontroller-projects/controlling-nema-17-stepper-motor-with-arduino-and-a4988-stepper-driver-module