RPi 3.3V to 5V 26 I/O Bidirectional Voltage-Level Shifter Module for Raspberry Pi, Logic Level Converter

Literally, plug it into your pi and you should pick up your gpio readings via the /boot/firmware/config.txt Also turn on gpiopin=X and turn on, dtparam=i2c_arm=on In my case it was one wire thermocouple so I'm looking at: /sys/bus/w1/devices Working with Raspberry Pi4

This board here let me sneak into the world of one-wire hackery. A few jumper wires - a few little resistors n a breadboard later: n I was cloning what the manufacturer of a certain dental machine manufacturer thought they could charge $8,000 for. That's right. They used the obscurity of one-wire eproms to store a license key onto the firmware to lock out upgrade features. That's abuse of capitalism, using our technology against us. YA GOTTA GET UP ALOT EARLIER BUB!

This was for another board and not the Raspberry Pi. I was using it on a BeagleY-AI. Good board and some pins fit the pins on my board.

I got this card to interface to a relay with a 5v coil. Sadly the output of this card is not enough control the relay.