I was actually thinking if the TLCs continue to be so problematic, that I build another chime board, but bypass the 555s and drive the flipper contactors and shaker motor off that instead?
And then for the flashers, try and find the brightest WS2812s that I can, and run 5 of those as an addressable light strip. Haven't got to the stage of seeing if I can map individual addressable LEDs to the 5 flashers in DOF config. I have a bunch of individual WS2811s from my christmas lights which I might be able to use.
That seems like a good backup plan to me. A lot of people prefer the light strips over the flashers anyway, since you can do more with them.
Most of my SM experience is with passive components, so have not had first hand experience with a QFN package, but am willing to give it a go if I've exhausted all DIP options.
The QFN packages are tough to work with by hand since they're so tiny, and all of the pads are hidden under the chip. A solder mask would help a lot, if that's an option for you, since you can at least get the solder paste lined up with the little pads. The PCB pads are only 0.23mm x 0.8mm, with 0.08 mm spacing - not human-friendly dimensions. The TSSOP packages aren't exactly easy, either, but they're quite a lot bigger and the leads are exposed, so it's possible to see if the solder all ended up in the right place.




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