Everything for Electronics

Build a Voltage Monitoring System with RTOS

Multimeters are a wonderful and easy-to-use tool to accurately quantify the incoming AC voltage from a pure sine wave output power supply. Barring a few high-end hybrid models, not all are capable of plotting the trend of this quantity over a limited time period, like an oscilloscope. So, I decided to build a voltage monitoring system with RTOS.


Build a Digital Clock Family Using Nextion Displays

I’m a digital clock nut. I began experimenting with the newer Nextion displays, which I really like. I’ve produced digital clock versions for the 3.5, 5, and 7 inch size Nextion display. They all run from the same printed circuit board and have several different functions.


An ESP32 / Teensy 3.5 Super Clock

After creating an Internet connected digital clock using the Adafruit RA8875 driving an seven inch LCD display, I decided to step it up a notch and add several additional features including: the ability to set an alarm; a countdown timer for uses like monitoring an exercise program; a weather display to provide brief conditions at 10 different cities; a real time stock market report that gives the changing prices for a selection of stocks; and lastly (just for fun), a Mandelbrot fractal generator to produce those wonderful images.