Encoding mp4 for Dolby Digital 5.1 on AppleTV

This is a short howto on creating a .mp4 file that plays on as Dolby Digital 5.1 through the popular media players such as AppleTV and XboxOne. The .mp4 file contains H.264 video, both AAC and AC-3 stereo audio and subtitles. «read more»

Arduino Stuff

Getting started with Arduino. Breakout and shields. Development environment. «read more»

ESP8266 reads Google Calendar

own work

This is not exactly the first approach of pulling data from Google Calendar, but it may be the first that directly connects to Google. This program calls the Google Script API, that in returns the relevant calendar event. «read more»

Soldering with Kids

Overview soldering equipment and projects for kids «read more»

RLC Low-pass Filter

own work

Filters can remove low and/or high frequencies from an electronic signal. They can be used to suppress unwanted frequencies such as background noise. This article shows the math and visualizes the poles in the s-place, examines and visualizes the the step and frequency response. «read more»

RC Low-pass Filter

own work

Low-pass filters remove high frequency components from a signal. A single-pole passive RC filter consists of a resistor and capacitor in series. «read more»

Math Talk

own work

This article is a sequel to the inquiry “Building Math Hardware“. It allows this Math Hardware to communicate with a microcontroller. We use an AVR microcontroller (Arduino) to generate the operands for the math operations, and display the results. The Math Hardware is implemented on an Field programmable Gate Array (FPGA). The communication is over a Serial Peripheral Interface (SPI). «read more»

Evaluating Transfer Functions

own work

Evaluating transfer functions with impulse, unit step and sinusoidal input signals «read more»


own work

Introduces the formulas for Capacitor and Inductor impedance. «read more»

Laplace in Mechanical Systems

Using Laplace transforms to solve mechanical ordinary differential equations «read more»

Laplace Transforms

Proof of Laplace transforms as used in my Electronics article «read more»

Euler’s Formula

Proof of Euler’s formula, identify and relation to trigonometry. «read more»