Time for another post.

A while ago I bought a new Oscilloscope, a RIGOL DHO914, but this scope doesn't have WiFi built in just a LAN connector on thre rear, luckily, as the Scope runs on Android someone has figured out how to get WiFi by using a TP-Link USB WiFi Dongle which, you can plug in the single USB port on the front of the scope.

I found this Youtube video explaining how to enable the WiFi using a plugin TP-link WiFi dongle.

Unfortunately it only has one USB port, you can plug in a WiFi dongle, mouse, keyboard or memory stick but only one at a time.

Now the problem is that I wanted to have the WiFi dongle and a mouse plugged in at the same time so I needed a USB gateway to do this but it's a bit ungainly so I thought I would have a go at making my own USB gateway that fits in with the layout of the scope (I know that they can be bought from Aliexpress for a couple of pounds but where's the fun in that!).  This will allow more than one thing to be  plugged in at the same time.

I found the FE1.1S chip that was a 4 port USB hub controller and JLCPCB had them in stock for $0.55 (£0.41) so I set about designing my own USB HUB.

JLCPCB Part Link

First Attempt

Two port hub

As usual I couldn't wait to get the design done and ordered from JLCPCB  but those eagle eyed amongst you will notice that this device gives me a problem for the DHO914 in that it blocks the Logic Analyser connection port, on the DHO800 series this would be fine as they don't have the Logic Analyser port but for me it will be a problem when I get the Logic Analyser option.

So on to design number 2....

Having proven out that I could make a working USB hub I decided to try and make a design that would better suit the DHO900 Series of scopes, this time I decided on a three port hub with the ports horizontal and below the Logic Analyser port.

Design Render

This design will plug into the single port and still allow the Logic Analyser to plug in although as of today I've not tried it with a Logic Analyser.

The design comprises two PCBs, one for the male USB plug and the other for the three USB sockets, they are connected together using some normal wires (ignore the PCB labels in the render as they are incorrect).  The cover holds the Male USB PCB in place and is screwed from the rear and sides to secure all the parts together.

With the front cover off

All the files including STLs and PCB gerbers etc. are available on Printables.com here.