10-channel level converter with Raspberry Pi connector

This is a very quick and easy solution to an ever-present problem in my electronic life: some microprocessors and sensors/devices work at different voltages, and their IO pins are not tolerant to X volts.. .... Of all of them, the dear Raspberry Pi is the most guilty, along with the RP2040 and ESP32/ESP8266. On the sensor side, ultrasonic sensors, infrared thermometers, etc. all require 5v logic or 3v logic... What's usually followed is ugly resistor/divider circuits on breadboards, wonky connectors, unreliable data, etc. This usually ends up taking a lot of time to debug and get it to work reliably. If you want to use it for something like SPI or I2C, it doesn't work either... You can buy off-the-shelf PCB modules online and they will work and are fairly cheap, but the fun of that is Where is it? I decided to design my own but added a few twists... I wanted it to plug into a Raspberry Pi GPIO port. I also want a lot of GPIO channels, which must be bidirectional. There’s no point in just going one way! I came up with this: one BSS138 N-channel Mosfet per channel with two 10k resistors.