But lets make it super cool and add a footprint for one of these: – a surface mountable Realtek Wifi NIC module? PCB Design coming this Sunday! So what about the lack of networking on the Pi Zero? Well I am already working in a USB Hub, I wonder if I can add a USB Wifi Adapter. And again, I already have a building block in my github from a design I was working on before the Zero came out: The TMC2660, capable of 4A per motor, 256 microstep! Wifi I’m going to need a good stepper driver setup. So what else does a RPI ZERO CNC CONTROLLER need? Grbl! The old easy favourite, although, John Lauer of just asked me on Google Plus (thread on ) if I can make it work with TinyG too and I said, sure, why not! So two versions in the pipeline! High powered Stepper Driver stage

Next, for the USB circuit, I will go with my old trusty building block circuit, the TI TUSB2046: (already open sourced it on my Github, here: ) Grbl and TinyG – yes both This allows a clean, slot on adapter – no messy wires. To connect to the Pi Zero, instead of a small cable, I want to have a small PCB soldered on at 90 deg to the main board, holding a PCB mount USB Micro socket: I just received a few hundred of these from Aliexpress a few weeks back…. So first problem I want to tackle is a board on top, or on the size, with a 4 port USB hub. The Pi Zero is great right? Except it doesnt come with proper USB Ports ): Sucks right? So what happens when I am bored, sitting in a guesthouse, armed with Eagle, a crazy idea, a community encouraging me, and a handful of parts in my parts bin just itching to be used? Mixed in with a passion for CNC? Yip exactly that what you were just thinking! Couple of points to plan in… USB Hub

So, yesterday the Raspberry Pi Foundation, released a new Pi! The Pi Zero!

Grbl controller for raspberry pi