Archive for the ‘EMF’ Category

Extremely Low Frequency Electro Magnetic Field Sensing (Part 5)

Part 1, 2, 3, 4, 5 Time for upgrade. The pretty popular ELFEMF posts were prepared before the obsolescence of PlainADC and PlainFFT libraries.  Next is the revised code for the detection of Extremely Low Frequency Electromagnetic Fields which is compatible with PlainDSP library. So simple and yet powerful application! Enjoy. /* MicroELF_EMF: Electrical radiation measurement Revision 03 Applicable license […]

Extremely Low Frequency Electro Magnetic Field Sensing (Part 4)

Part 1, 2, 3, 4, 5 FFT posts are the far most visited pages from Arduinoos, and MicroELFEMF is one of the simplest and cheapest example of implementing this complex function. I got many requests and questions related to this subject, which drove me to publish some more explanations. Understanding frequency bins is not trivial and I encourage you […]

Extremely Low Frequency Electro Magnetic Field Sensing (Part 3)

Part 1, 2, 3, 4, 5 This post deals with the sensing antenna which can increase the sensitivity of the MicroELFEMF application One of the difficulties posed when sensing ELF frequencies is antenna size. This is because the antenna must be at least a substantial fraction of the size of the wavelength of the frequency of the EM waves. […]

Extremely Low Frequency Electro Magnetic Field Sensing (Part 2)

Part 1, 2, 3, 4, 5 The proposed application features a few ideas which may be reused for all sorts of applications. As usual, the idea is to build the most exciting Arduino application with the least additional components. In this sense, MicroELFEMF is a serious challenger, as it requires… no additional components! What this application will do is […]

Extremely Low Frequency Electro Magnetic Field Sensing (Part 1)

Part 1, 2, 3, 4 Since almost all modern houses are fitted with AC current we are surrounded by electro magnetic fields. For those who are used to oscilloscopes, you know that the simplest way to illustrate this phenomenom is to approach your finger from the tip of the probe. Thanks to the fast signal sampling functions and to […]