I can't find any simple adapters that snap onto a modern 3.3V microcontroller that have a level shifter built in.
Most new/interesting microcontroller boards are 3.3V with some of the having a few 5V tolerant input pins. There are lots of little level shifter boards out there, some are bi-directional, some are only one way and others are suitable for I2C.
Question...Adafruit seems to have settled on a reasonable form factor with their feathers/wings and the Teensy has a nice simple row of headers that are breadboard friendly but I can't see any boards that you can snap into their headers (wings, shields etc.) with lever shifters on them.
They all seems to be the ubiquitous tiny board with the shifter chip on it
or a bunch of fets that you just wire in between the MCU board and you circuit in a messy way.
I pretty much want it so I can more easily control old logic chips with modern microcontrollers, so 3.3V to 5V and not the other way around. Even if many of those chips work fine with V
IH at 3.3V it's still easier not to have to think about it.
A larger board that you clip the Feather/Teensy/whatever into or one that snaps on top of the board that then breaks out the IO pins after having been level shifted would be much neater.
Does such a thing exist that anyone can recomend?I guess I could make my own with the FeatherWing Doubler - Prototyping Add-on
https://www.adafruit.com/product/2890 OR
Featherwing Proto
https://www.adafruit.com/product/2884or of course since it just hole per 0.1inch I can make my own board with the standard protoboard I already own but it's weird that I can't find anything already manufactured.
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