This expandable LED display for a microcontroller in Figure 1 has a simple interface with only 6 data/control wires and can be easily accommodated to a DIY design. The display has static indication.
XDA Developers on MSN
This ESP32 project replaces a leaking shower head with a live temperature display that glows from blue to red
No more sheepishly putting a hand under the water to test it yourself.
Build a homelab status light tower this weekend with your Raspberry Pi ...
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