Chris’ Miscellanea

I got a little tired of writing a generator for synthetic data in a VHDL testbench, so I thought, maybe just use an oscilloscope trace with ...

Working with a Behringer XR18 Mixer and using the brilliant Mixing Station Air software, I've made a custom layout for it. It can be d...

Debugging an issue with a Roland TD-25K electronic drum set . First, here are the outputs of the trigger-pads. Yellow is "tip" o...

This is a followup on my earlier blogpost  Archlinux on the Toradex T20 from 2012. I happened to resurrect my old Toradex NVidia Tegra T...

I've ported  William R. SOwerbutts socz80: A Z80 retro microcomputer for the Papilio Pro FPGA board to another cheap FPGA board. My por...

UPDATE: Ulrich Borghoff did his repair slightly different and sent in photos. Thanks Ulrich! Here's a Yamaha DGX-620 keyboard with a...

The HMC660 Headset made by Superlux is dirt-cheap, and not that bad, for the price. Certainly beats some other headphones sold for €39. But...

Some time ago, I bought three used W&T 36201  isolated USB to RS485 interfaces. They have pretty good build quality and are intended to...

Debugging a problem with a ASUS RT-N12E 300Mbps Wireless N Router, I soldered a pin header to  J15 (next to the ethernet magnetics handling ...

Quite a lot of USB devices claim to be a human interface device , the rationale being that you can access them on Windows without the need t...

Oh, pulseaudio , how do I love thee... The Focusrite Scarlett 6i6 is a 2 Mic, 2 Line, 2 Digital input, 4 Line, 2 Digital output audio int...

Here's a teardown of a Behringer XR18 (sometimes spelled X18R) Compact Digital Mixer . There's a full album with all pictures I to...