I found that I have a couple of LED bargraph displays in my junk box. They are the old-fangled single colour type, not even the multi-coloured type used for battery charge indicators, level indicators and the like. They were intended to be driven by the LM3914 IC. That chip can be configured for dot mode or bar mode.

At the moment I don't have anything I need to display the level of. But since the display contains 10 discrete LEDs, I wondered if I could make a 10-bit display out of it. Let's see, for a binary clock, 0-59 minutes need 6 bits, and 0-23 hours need 5 bits. Oops. Maybe a 12 hour clock, and look out the window to see if it's AM or PM. 😉

It would be trivial to wire up to a MCU and get working, but nah, I'll pass on this one. The display would be too small, straining my eyes. It's bad enough having to mentally decode the binary. I know most of my projects are useless, but this is even more useless than usual. 🤪 Just setting down the idea for my amusement.