Highlight: Fall 2017 anime season

Despite the hypes around Mahoutsukai no Yome, the show ultimately falls short. It did great in world building, audio-visual quality, and character development. However, it lacks suspension; it lacks a dilemma to overcome, an antagonist to defeat, or a MacGuffin to desire. The only villain appeared in the show thus far has been as flat as… Continue reading Highlight: Fall 2017 anime season

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DIY Memo: ESP8266 v12 analog I/O

This is an amendment to the previous ESP8266v7 memo. More specifically, the I/O pins don't behave exactly as described by internet sources. A little bit of background: I was presented with a challenge to read from an analog sensor and send the reading through wifi network to the cloud. This can be accomplished easily using… Continue reading DIY Memo: ESP8266 v12 analog I/O

Memo: AC displacement sensors

Resistive sensors, in general, can operate both DC and AC excitation. The frequency characteristics, the output encoding and bridge's components can vary but the operating principles remain the same. Other sensors that take advantage of capacitive, inductive and magnetic phenomena, however, only accept AC excitation. Capacitive displacement sensor Capacitative displacement sensors are passive sensors operating solely on… Continue reading Memo: AC displacement sensors

Kleine Geschichte: Das Land ohne Wege

„Der Krieg dauerte so lange, dass er nicht mehr hoffen konnte, das Vaterland wiede zusehen.“ Es war 1943, der kälteste Winter in den letzten vier Jahren. Herr Müller und seine Kollegen--Herr Fischer, Herr Abrecht und Herr Schneider—schliefen bei einer Feuer auf der Wiese in Frankreich. Gestern kamen sie aus der Schweiz nach Lyon. Der Weg… Continue reading Kleine Geschichte: Das Land ohne Wege

Memo: AC excitation

All passive sensors discussed so far rely on DC excitation. DC has its charm in simplicity, low cost and fluid integration into existing digital technologies. However, when it comes to analog technologies, AC excitation remains a cornerstone of high-performance circuits employing inductive or capacitive elements. For the most parts, the working principles of passive sensors are the same in either case;… Continue reading Memo: AC excitation

Memo: Strain gauge bridge circuits

As mentioned in the previous memo, strain gauges are vulnerable to temperature effects such as thermoresistive, thermoelectric and self-heating. Some special alloys like Constantan are designed to be self-compensating while others aren't. Those that aren't will require special conditioning circuits utilizing one or more complimentary strain gauges in bridge topology. Three most common bridge circuits… Continue reading Memo: Strain gauge bridge circuits

Memo: Resistive displacement sensors

Displacement sensors (aka position transducers) convert spatial information; linear distance, rotary position, and deformation; into electrical quantities. One family of such sensors are called "encoders" ergo, devices that encode position into a signal. Based on their coordinate system, encoders can be roughly classified into linear encoder (Cartesian coordinate) or rotary encoder (Polar coordinate) classes. The most basic displacement sensors… Continue reading Memo: Resistive displacement sensors

Short story: Halloween special

They ventured into the crypt: five militias, two knights, two priests, and one dog; torches in hands, provisions on backs, and a primal fright at heart. Leading the pack, the younger of the knights, Sir Rathamul brandished a sword and a spiked lantern shield. The oil lantern, a part of his shield’s gauntlet, emanated a… Continue reading Short story: Halloween special