My Thermochromic Clock did not satisfy my quality standards, thus I had the PCBs without any use. After some thoughts I decided to build a 10 digit 7-segment screen.
In this project I designed a PCB to fit with the Thermochromic clock control panel. The result is a large 7-segment screen.
Design the 3d printed frame
Since I already had the control panel I had to design the 7-segment digits. I decided to make it simple and use the available PCB assembly service. Due to cost optimizations I had to make 2 digits on one PCB.
After receiving the assembled PCBs I modified the software and the screen was working. Thanks to the Thermochromic project there was not too much to discover and I could reuse most of the code. Just some modifications were required.
I find the end result looks pleasing and I am satisfied. A 7-segment digit has its limitations and having only 10 digits reduces the possible messages that could be displayed. Nevertheless, it is a nice clock and could be used for some other simple messages.