Troubleshooting Analog Pins A6 & A7 on Arduino Nano
A few months ago I documented the process for creating a large 7-segment LED display. After figuring out the pin locations, the wiring, and the code, »
Custom PCB for LED Matrix Clock/Thermometer
This is a continuation of the post I wrote more than two years ago where I explored the pin layout of a large LED dot matrix »
Make an amazing $6 digital radio with an old ESP8266 and a VS1053 decoder
As always, before I begin my description, I'd like to give credit to the original creators of this project. It's called Ka-Radio and there's an instructable »
Designing and fabricating a giant 7-segment display with Fritzing and JLCPCB.com
This is the hardware part of my odyssey to design and build a large 4-digit, 7-segment display, running on an Arduino Nano. It's a great case-study »
Even a complete novice can manufacture a professional PCB for very little money
This post explains how I ended up manufacturing a cute little binary counter PCB through jlcpcb.com. To make it clear from the start - my »
Track Network Connections - Installing Fing on a Raspberry Pi
What is Fing? Most users of Raspberry Pi have needed to find its IP address on their local network. A quick goggle at Google, and we »
Outdoor apparatus to log data straight to Google Sheets from a BME280 Temp/Humidity/Pressure sensor
About a year ago I posted a blog describing how to log temperature straight to google sheets from a DS18B20 temperature sensor. New Version This blog »
How to control a device with a Kronaby smart watch
Geek that I am, until now I've avoided smart watches. The square-faced Apple Watch never appealed to me and the Android devices look too big, clunky, »
How to make a smart switch for less than $10 that works with Google Home (and other smart assistants)
Several acquaintances have asked for instructions to build a switch that can be operated from a phone app, and/or virtual assistant (Google Home, Alexa, etc) »
Measuring Speed of Rotation with an Arduino, a LED, and an LDR (Light Dependent Resistor)
A couple of days ago I watched a YouTube video where a guy pointed a device at a spinning disk. The disk's rotation speed was displayed »