Ferdinand Keil's

electronic notes

Nov 03, 2012

Simple Task Scheduler for Microcontrollers

For a project I'm currently working on I need to write a (at least for me) fairly complex firmware. The code I used in the last version of this circuit grew out of a test program and became unmaintainable. So I looked around for some inspiration and found Alan Burlison's …

Sep 05, 2012

Teardown of a cheap rotary encoder

For my humidor controller project I recently ordered cheap Chinese rotary encoders via eBay. Before I used the Noble RE0124PVB17, but they were out of stock just as I needed more. As I didn't want to spend much more than 50ct per piece I had to turn eBay for cheap …

Jul 11, 2011

Shuttle FS51 v2.0 (SS51G) LAN problem

These days I swiped the Windows installation from a Shuttle XPC system and set it up with a clean install as I plan to give it away. While I was cleaning the mainboard from dust, I found the single SRAM module to be sitting in the slot DIMM1. On most …

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