PS3 CECHA NAND FAT

You need the teensy ++ 2.0
https://www.pjrc.com/store/teensypp.html
https://www.pjrc.com/store/teensypp_pins.html
You need this 360 clip
https://pt.aliexpress.com/item/Hot-selling-32pin-360-clip-TSOP-NAND-Flash-Chip-for-ps3-progskeet-original/32558375123.html
You need to create a cable to connect the two together. Then you need to figure out power. I used a 5v wall transformer + low buck power converter to bring the power down to 3.3v.
Here is an album of my setup: http://imgur.com/a/tx50k
Here is the best guide to follow: http://psx-scene.com/forums/f263/ultimate-fool-proof-guide-ps3-hardware-downgrading-104398/#post984843
I created my cable based off this guide.