I just finished a new quickie project: The Headset to XLR phantom voltage adapter. This adapter / converter makes it possible to use your low voltage electret microphone on a professional audio interface with 48V phantom power. I was astonished to learn how low the noise floor of my headset really is, if only it […]
As so many I finally decided to change the fan in my DS1054Z for a quieter one. The Gelid Solutions Silent 5 (FN-SX05-40) has very similar data to the originally installed Sunon ME50151V3-000C-A99. It is hard to judge if the airflow is indeed the same, even in the throttled mode which is used by the […]
The CPU Monitor tool from my last blog post got expanded a bit. It now got its own git: https://github.com/hattedsquirrel/ryzen_monitor It now supports different versions of PM tables any witht hat is ready to support future BIOS versions and also can support multiple different CPU series. Right now Ryzen 3000 series and Ryzen 5000 series […]
In my last blog entry I found that the Ryzen CPUs consume significantly more power than they report via the usual software. Several internally and externally generated power nets seem have no reprensentation in software. I also supected power counters for these additional planes might actually exist in hardware but are just not exposed by […]
There is very little kown about the power consumption of desktop Ryzen 5000 (Zen 3) systems. The usual tools show 3-4W of SoC power in idle and anothe 2W for the core when playing a YT video. Yet, people struggle to get acceptable energy figures for the complete system besides all claims of high energy […]
This is the process of replacing the flat flex cable for the aperture assembly of the Canon EF-S 17-85mm f/4.0-5.6 IS USM. Apparently some of the early models were susceptible for this cable to break. Official repair by Canon costs more than a brand new lens, but aftermarket cables are available. It is not so […]
Finally got the panels somewhat round. Also got rid of the FPGA dev board and designed my own. The power supply solution has been revised. While the electrical interface specification of HDMI is close enough to LVDS so that the IOBUFs of the FPGA can directly interface to it, there is no propper on-chip termination […]
Got the bigger panels to work. Unfortunately they are much stiffer than anticipated. Expected capton foil, got 0.5mm fiberglass (FR4). Well, we’ll need more force then. Also the HDMI sink now works. I’m genuinely surprised how easy HDMI is. Made my own EDID, the FPGA registers as an ordinary HDMI screen and is driven by […]
Just got all of my LED panel control scheme implemented and everything is working together nicely. Right now I am at 14+8 bit per subpixel (14 bit for each pixel and color + 8 bit for overall brightness). I am using line scrambling to increase the percieved steadyness of the image when the display is […]