MAX7219
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 display. As you can see from the photo below, I eventually made it into a clock/thermometer. The problem was, it had lots of
Arduino
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 in figuring out something complicated - by taking small steps, one at a time. I'm an enthusiastic amateur with no
Arduino
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 only connection with the company is that I've ordered a couple of PCBs from them. I'm simply amazed that they
MAX7219
First off - I take no credit at all for this project. All praise goes to the code writer David Bird. His code is here. I needed to be able to send a message to a dot-matrix screen remotely. I found the solution in minutes. It works so well, I
DS3231 Real Time Clock
My addiction to clocks started a few years back when I got it into my head that I wanted to build a mechanical timepiece. I spent months scouring Google for a clock kit and all I came up with were mass-produced electronic movements. That's until I found Dave
Arduino
In today’s blog, I am going to show you the easy way to interface 7-segment displays – Using the MAX7219. Each 7219 chip can be used to interface eight 7-segment digits, or 64 individual LEDs. Previously, in part 1 of my blog posting Programming a 7-segment Display, using just Arduino