Home made large 7 segment LED display
As you may recall, I had a post on the large (10 cm or 4″) 7 segment display earlier, when … More Home made large 7 segment LED display
All articles by Heikki Hietala
Back in business with the Seeedstudio Grove Arduino kit
Hi all, it’s time to return to the mines and start delving for more fun and educational Arduino stuff! In … More Back in business with the Seeedstudio Grove Arduino kit
Documentation images for the Kotokino Mark IV scanner
I was asked to provide more detailed images of the Kotokino Mark IV telecine machine, so I shot a dozen … More Documentation images for the Kotokino Mark IV scanner
The Donald Duck hypnotizing machine with IoT
Note – the full code is available on my GitHub page, so I will only illustrate portions of it here. … More The Donald Duck hypnotizing machine with IoT
Using the UDP protocol with an ESP32 and Android Studio, Part 4
I gather that you have already seen part 1, part 2, and part 3, and are just as surprised as … More Using the UDP protocol with an ESP32 and Android Studio, Part 4
Using the UDP protocol with an ESP32 and Android Studio, Part 3
In the previous episodes of this trilogy, I showed you the general idea of using UDP (User Datagram Protocol) to … More Using the UDP protocol with an ESP32 and Android Studio, Part 3
Using 7 Segment LED displays, Part 4 – dual quadruple units
Okay, I thought the series on 7 segment LED displays would run into three parts, but it has turned out … More Using 7 Segment LED displays, Part 4 – dual quadruple units
Using 7 Segment LED displays, Part 3
This part concludes my foray into segmented LEDs. Part 1 showed you how to work with single digits, part 2 … More Using 7 Segment LED displays, Part 3
Using the UDP protocol with an ESP32 and Android Studio, Part 2
In the first episode of this three part saga, I gave you a basic overview of the workflow when working … More Using the UDP protocol with an ESP32 and Android Studio, Part 2
How to use the Heltec OLED display on the ESP32
Heltec is a Chinese company that makes all kinds of SoC (system on a chip) devices. Their ESP32-based SoCs appear … More How to use the Heltec OLED display on the ESP32