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Christian Vogel
64 followers -
Physics, Electronics, Software
Physics, Electronics, Software

64 followers
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VHDL Testbench using Oscilloscope Waveforms
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 real-workd data for this purpose. So, here's the VHDL code, I've only captured one channel and it's stored as unsigne...

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Roland TD-25 (Drum Sound Module) Pinout and Waveforms
Debugging an issue with a Roland TD-25K electronic drum set . First, here are the outputs of the trigger-pads. Yellow is "tip" of a TRS connector, cyan is "ring". Both the bell and the dampening signals of the cymbals connect to the ring and there's a const...

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Roland TD-25 (Drum Sound Module) Pinout and Waveforms
Debugging an issue with a Roland TD-25K electronic drum set . First, here are the outputs of the trigger-pads. Yellow is "tip" of a TRS connector, cyan is "ring". Both the bell and the dampening signals of the cymbals connect to the ring and there's a const...

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Archlinux on the Toradex T20 (with Archlinux' kernel)
This is a followup on my earlier blogpost  Archlinux on the Toradex T20 from 2012. I happened to resurrect my old Toradex NVidia Tegra T20 / Colibri / Iris eval-board , which I had running using Toradex' kernel back in 2012 already. And it's amazingly smoot...

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Port of William R. SOwerbutts' to a cheap Spartan6 board (ESPIER_III V105)
I've ported  William R. SOwerbutts socz80: A Z80 retro microcomputer for the Papilio Pro FPGA board to another cheap FPGA board. My port  can be found on github .

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Yamaha DGX-620 LCD Repair/Retrofit
Here's a Yamaha DGX-620 keyboard with a broken LCD. Judging from the fact that there are quite a few videos and tutorials on how to exchange a broken LCD with the proper spare part, I'd reckon these LCDs break quite easily and often.  (Broken LCD) (Original...
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