Latest from the Blog
Calculating bitmask value for ESP32 external wake up: Google is your friend
I’m currently learning how to use the deep sleep functionality for ESP32. I’ve been following the excellent article by Random Nerd Tutorials ESP32 Deep Sleep with Arduino IDE and Wake Up Sources. I recommend this article if like me you are starting out with deep sleep with the ESP32. I want my ESP32 to wake…
Converting raw data samples into meaningful results: Calibration and formula generation
So you have a sensor connected to your microcontroller. How do you calibrate it, particularly if the values from the sensor are not linear? That’s a problem I have thought about before and it came up again yesterday when I wanted a project to monitor a battery voltage level. The current project that I am…
New mailbox built mainly from recycled material
Mail delivery has become more important for us in recent years than it ever has been. While many communications have become electronic, more of the goods our family buy are purchased online as the option to buy locally is limited and in some cases is reducing. We are in a rural mail delivery area. There…
Gardening: There are intruders stealing our corn
We have had a vege garden going on and off for over 30 years and we grow corn most years. When I checked the corn the other day I saw something I had not seen before. All the husks and corn kernels had been neatly removed from a cob of corn. There were ants on…
Lots of goodies at our local recycling shop
If I said I lived in a small city you would probably have a misconception about the size of the place. While it is called a city it only has a population of around 20 000. In most places of this size it would be considered a rural town. There are some advantages and disadvantages…
Building Interactive fiction / Text adventures with Excel
In 2006 just a few years after completing a course that included some VBA programming for Excel, I hit on the idea of using Excel to create a Text Adventure / Interactive Fiction game builder. I spent spare time for a year on it. It worked but there was more than I wanted to do,…
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