There is a TI TXB0106 -based level translator I made to talk to A1s. Requires VCC from the MCU board for high voltage side to function and translate correctly. Also provides 1.8V for A1s data interface. The LDO on the left is TI LP3871-1.8V. The circuit is trivial.
I need a second one and it takes too much time to build on a protoboard. I'm routing a PCB, will post when ready.
https://www.circuitsathome.com/wp/wp-content/uploads/2014/04/bc_levelshifter.jpgis it really necessary to have level translator for RPi connection? why nobody mention it before (or I miss something?)
