WD0AJG's Ham Rado Daily

Tuesday, August 27, 2019

Fwd: Another ESP32 Clock, Morserino Kit Review, Variable Voltage Divider

 
 

ANOTHER ESP32 DIGITAL CLOCK
New adventures with two cores and the ESP32.

 

After successfully completing two different model digital clocks with large LCD displays and using the ESP32, I wanted to build a smaller version. And this one has two cores! Here's how I did it.

 

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AN ELEGANT APPROACH TO DESIGN A VARIABLE VOLTAGE DIVIDER
These design ideas for voltage dividers really add up.

 

A voltage divider is probably the most common electronic circuit. Despite its simplicity, it can be a design challenge for many folks, particularly beginners. This article presents a fast and accurate way to design a variable voltage divider with minimum math.

 

Analog Discovery Pro Bundle: USB Mixed Signal Oscilloscope

Get the precision of a 14-bit ADC without the constraints of a lab

The Analog Discovery 2 Pro Bundle offers a high-resolution oscilloscope, logic analyzer, protocol analyzer, and 9 other instruments in a compact affordable device. Complete with the accompanying free software, WaveForms, engineers have found the Analog Discovery 2 to be the Swiss Army Knife any benchtop needs.

View specifications and additional reviews

 

LEARN TO SEND AND RECEIVE MORSE CODE WITH THE MORSERINO-32
Review of the Morserino-32 CW Trainer.

 

Proficiency in sending and receiving Morse code — while no longer required for licensure — is the best way to experience traditional ham radio. Today, there are dozens of freely accessible websites and free or inexpensive apps for Android and iOS tablets and phones that provide sophisticated and efficient Morse code training. However, one of my favorites is the Morserino-32: a feature-packed microcontroller-based send and receive trainer, available from Willi Kraml OE1WKL for $99.

BUILD A FUN STYLOPHONE
This unique musical gadget makes learning how to write fun!

 

I decided to make an electronic musical toy as a Christmas gift for my young son. I browsed the Web looking for inspiration and found the stylophone: a miniature analog stylus-operated keyboard that was invented in 1967 by Brian Jarvis. My unique take on it combines music and writing to make learning fun!

 
 
 
 

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