Archive | Electronics


DIY Piezo-Electric Touch Probe with high sensitivity

I built this mechanical piezo-electric touch probe recently as an extension to a CNC machine to sense the depth of surfaces. It works with the grbl CNC controller and probably others. The goal was to flip a TTL (5V) signal whenever the probe was touching a surface mechanically. Unlike classical mechanical switches which have moving parts, this probe is ‘solid state’ and […]

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The Bosch BMP180 on an Arduino UNO board

Infrasound Barograph with FFT spectrum analysis: Arduino UNO + Bosch BMP180 Sensor + Qt5 + HTML5

Infrasound sources are ubiquitous in our environment, but humans cannot hear them. In recent years, there has been rising interest and collaboration in infrasound monitoring, for reasons from health concerns regarding large wind turbines to detection of atmospheric nuclear bomb testing, not to mention that the Chelyabinsk meteor of Feb 2013 which created intense shock waves of about 10 […]

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