my technical scratch pad

trying to get to the bottom of things, successfully at times. RCAs, roughly in historic order, newer ones first. Some pages are available in English and German, but most offer just one of the two. Sorry about that- may be added at some time. However, most of the pages in German are dealing with things of a relatively geographically local scope.

  

• portable audio recorders, Tascam X6 versus Zoom H4N Pro , Dec 2023
• unmounting of a BKS door lock , June 2023 (in German, probably only useful in Germany)
• Changing the CMOS battery on a Fujitsu Esprimo Q920 ''lunchbox'' PC , May 2023
• repair of the inductance of a Mini Maglite flashlight , July 2022
• problem with some USB-serial adapters on Linux , Jan 2021
• SCSI problem with Adaptec 2940 PCI card on Intel DH87MC motherboard , Dec 2020
• testrun on two IR (thermografic) cameras , Dec 2019
• I/O performance getting very slow after upgrading to Debian9, I/O scheduler weirdness , Sep 2019
• bits about a Fendt 305LSA tractor (currently in German only) , 2017+
• Zeiss tachymeter/theodolites , 2016+
• using matrix-vision camera and lib with ASCII C, simple gets-you-started example , Jul 2015
• comparison of mini excavators, 2ton class , Feb 2015
• timing of access to PCI PLX9054 bus interface, DMA versus CPU , Feb 2015
• Peak CAN bus card PCI problem at module load, Jan 2015
• notes of shipping a vintage IBM Selectric typewriter , Dec 2014, updated 2018
• USB stick showing two disks, Alcor chip AU6995, August 2014
• reading an Android backup file , May 2013
• misc bits for boards made by Advantech , April 2013
• TAN Generator via Bildschirm (German, probably not relevant outside Germany, Feb 2012)
• modeline for Faytech monitor FT0700T, Jan 2011
• Xserver on Geode GX2 "Literunner2", June 2010
• some notes on Blackfin CPU and Linux , April 2010
• Panasonic/Lumix G1, DMW-BLB13E 3rd-party battery, May 2010
• Hatz 1D81, Bosch PFE-1075/50 high pressure Diesel injector pump and RME, Feb 2010, March 2022
• IBM T40 laptop bits , September 2003, (technology quite obsolete)
• P-ATA raids , September 2003, (P-ATA technology obsolete)
• compact flash experience , December 2002, (this CF technology was superseded)
• sync handling at Ex-SGI Hitachi CM2198MSG monitor (1997, technology obsolete)

Subjects vary, I have tried to summarise each topic coherently.
Not all older summaries are kept updated.
Use any info contained herein at you own risk. No warranty for anything.