Everything for Electronics

Monitor Motion from a USB Webcam

This system monitors motion from a USB webcam on a Raspberry Pi 3 using the OpenCV API. Once movement is detected by the system, it takes a picture of what set the motion detection software off and emails that picture to you. It also affords you the ability to remotely view the webcam from an Android application from anywhere in the world at any time.


MakerPlot – The DIY Software Kit

If you use microcontrollers in your projects, imagine how helpful it would be to see the data in a graphical format, rather than just a series of numbers -- especially when debugging! MakerPlot does all of this and connects directly to your microcontroller’s serial port to display analog and digital data in graphical form; it’s DIY software for your microcontroller projects.


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.


Build the Graphing Thermometer

Recently, I began to explore ways to improve and upgrade my “thermal monitoring technology” and came up with this simple, easy to build trend-plotting thermometer. This project features a large color graphics display to show the current temperature in big bold digits. Better than that, it also graphs the temperature trends over the most recent 4, 8, 16, or 24 hour period. 

Whether it be temperature trends, time and date, current/voltage readings, battery status, or other variables, consider giving your next project some extra pizazz by including an LCD color graphics display into the design!


Build an Internet Digital Clock

The advent of the ESP32 Wi-Fi development boards allows for an increase in the sophistication of a digital clock. It doesn’t take much imagination to envision a digital clock with a large LCD display to not only show the usual time, date, temperature, and humidity, but to also be able to retrieve things from the Internet like the weather or weather forecast, and stock market reports as well. This seven inch clock also automatically corrects for Daylight Savings Time.


Mass Confusion: The End of the Kilogram as We Know It

This November, in Versailles, France, representatives from 57 countries are expected to make history. They will vote to dramatically transform the international system that underpins global science and trade. This single action will finally realize scientists’ 150 year dream of a measurement system based entirely on fundamental properties of nature. The International System of Units — informally known as the metric system — will change in a way that is more profound than anything since its establishment following the French Revolution.


Build a Custom Weather Gauge — Part 2

This fun, elegant, and useful project pulls data from the Internet so a series of useful displays can show all kinds of cool info in real time from your mantel or bookshelf in this impressive platform.

In our previous article, we discussed the circuit and code for each of the core components for our Weather Gauge. We took a deep dive on how the stepper is wired up and the node.js code that drives it. Now, it’s time to put it all together and light it up in this final installment.

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