There are lots of designs for making a circuit board drill press for PCB fabrication. I thought I would try one. Read more
Tag: ham radio
Become an Arduino Beginner at Any Age
Anyone can become an Arduino beginner at (almost) any age. Human curiosity and creativity are the only prerequisites. Read more
Solar Cycles – Enjoy those Sunspots
I was surprised to see tons of signals on the 15 meter ham band this weekend. Solar cycles effect how well radio signals propagate, and latest cycle has not been very good. Read more
Morse Decoder Circuit Completed
I have finished the breadboard testing and and finalized the Arduino Morse Decoder circuit. Here is the description. Read more
Recording Radio Signals with SDR
Recording radio signals is easy with modern software defined radios. Read more
Low Cost Bench Meter Solution for My Workshop
Using a few 3D printed parts, you can re-purpose a portable meter into a low cost bench meter. It’s nice to have the readout at eye level while you are taking measurements. Read more
Morse Decoder First Run Successful
My Morse Decoder first run was successful. Building the prototype quickly gets you on the learning curve faster. Read more
Arduino Analog Sampling – It’s All About Timing
Arduino analog sampling is a lot different than on an ordinary PC. Read more
Signal Analysis for a Morse Decoder
Audio signals exist in the time domain. Sound is a complex mixture of waves at different frequencies. These waves vary in shape and strength. Traditionally, engineers consider audio as a whole bunch of sinusoidal tones mixed together. You can visualize this complex waveform on an oscilloscope. Read more
Arduino Morse Decoder – How It Works
Let’s examine how an Arduino Morse Decoder works, and look at some popular solutions available. Read more