Posts

LeoDJ, 1 month ago to random

Latest project in the category "Is it actually useful or just an elaborate #shitpost?": #USB2Speakon!

It's a fully self-contained, USB-C-powered, 2-channel DAC + 5W Class-D amplifier inside a #Speakon connector.

Use it to connect your phone / laptop to any passive loudspeaker and enjoy surprisingly loud music (probably enough to host a room party)

(GitHub link for the interested: https://github.com/RainbowLabsDE/USB2Speakon )

#usbc #dac #audio #amplifier #stagetech

A USB A->C cable plugged into the USB2Speakon. It also works like that. But it just looks wrong :D
The USB2Speakon plugged into the back of a subwoofer with pass-through and a connected yellow USB-C cable leaving the image.
The finished test setup. A loudspeaker on top of a subwoofer to which the USB2Speakon is connected. A Framework laptop is connected to the other end, providing the power and audio signal. There is nothing else connected to the speakers other than the USB2Speakon and laptop.

LeoDJ, 2 months ago to random German

Schaufensterpuppe wird getragen, Kopf fällt dabei versehentlich ab und dotzt mehrfach auf den Boden

$Franzose: "Sorry, französischer Reflex"

#fsck24 #fsck2024 #fsck #fsckleaks

LeoDJ, 3 months ago to random

Bosch/Siemens: How should we name our proprietary data bus inside washing machines etc.?
Nobody:
B/S: Yeah, let's call it D-Bus!
https://github.com/hn/bsh-home-appliances?tab=readme-ov-file#d-bus

#dbus #bosch #siemens

LeoDJ, 4 months ago to random

I'm currently in the process of designing an #ExpansionCard for my new #FrameworkLaptop.

I need the #Unifying #dongle (lower latency), but don't want it sticking out and losing a whole slot.

So I'm going to throw a USB hub and the peeled dongle on a PCB and hope it all works out :D

As a further experiment, I routed the USB A SS lines past the hub (USB 2 D+/D- connected to port 1 of the hub).
Not sure if this will play nice with USB drivers, but it's worth a try.

#USB #DongleHiderPlus

A 3D render of the custom PCB

LeoDJ, 5 months ago to random

Anybody got some recommendations for a low-pain USB PD stack / MCU?
It has to support PD3.1, especially EPR.

I have skimmed the offerings from Cypress (Infineon), STM and WCH, but none have yet convinced me to any significant degree...

Are there some stacks/libraries that are commonly used on #STM32 that make it easier to get started?
Maybe some example code for an EPR source?

:BoostOK: #usbPD #usbC #WCH #CH32 #EPR

LeoDJ, 6 months ago to random

Now introducing: #PDBrick!

1.7 kW worth of raw USB-C PD power.

24x USB-C ports.
4x 100W, 20x 65W.
(4x USB A, but we don't talk about those :P)

I never did a post of the project that @techbeard and I did last-minute before #CCCamp23, so here you go.
Build log in the thread below.

#usbC #usbPD

Back view. The back consists of another milled PCB that holds the Powercon True1 power input socket, the XT60 24V power output plug and a large OLED screen.
View of the OLED screen in action at the Geekend Aalen '23. It mainly shows (a rough approximation) of the overall power draw and some internal stats.
The #PDBrick being utilized pretty heavily at the Unterland village at CCCamp23