HackadayPendulum Powered Battery
https://fed.brid.gy/r/https://hackaday.com/2026/02/08/pendulum-powered-battery/
KlarkatzeβοΈ
Bob the TravelerMichael Faraday discovered electromagnetic induction OTD in 1831 https://cromwell-intl.com/radio/balanced-line.html?s=mb #history #electromagnetics
Attila KinaliPSA: because it has come up again: The Veritasium video on parallel wires and the lamp is WRONG.
1) The energy is not completely in the field. If that would be the case you could conduct DC power through insulators, which is, obviously not possible.
2) The lamp does not immediately switch on. Only once the current/signal has gone to the end and come back, will the lamp switch on.
1/n
Hacker NewsNumerical Electromagnics Code (NEM)
#HackerNews #NumericalElectromagnetics #Code #NEM #Electromagnetics #Simulation #Engineering #Tools #OpenSource
pglpmHappy birthday, James Clerk Maxwell! π π β‘
Let's remember him not only for essentially formulating the full theory of electromagnetism, but also for founding kinetic theory and statistical mechanics (with Boltzmann and Gibbs), for his contributions to thermodynamics, the mechanics of continua, the theory of colours (I heard he took the world's first colour photograph); for his views about probability theory; and for MANY other things.
Among my favourite quotes:
> "They say that Understanding ought to work by the rules of right reason. These rules are, or ought to be, contained in Logic; but the actual science of Logic is conversant at present only with things either certain, impossible, or *entirely* doubtful, none of which (fortunately) we have to reason on. Therefore the true Logic for this world is the Calculus of Probabilities, which takes account of the magnitude of the probability (which is, or which ought to be in a reasonable man's mind)." β Letter to L. Campbell, 1850 <https://archive.org/details/lifeofjamesclerk00campuoft>.
> "In the popular treatise, whatever shreds of the science are allowed to appear, are exhibited in an exceedingly diffuse and attenuated form, apparently with the hope that the mental faculties of the reader, though they would reject any stronger food, may insensibly become saturated with scientific phraseology, provided it is diluted with a sufficient quantity of more familiar language. In this way, by simple reading, the student may become possessed of the phrases of the science without having been put to the trouble of thinking a single thought about it. The loss implied in such an acquisition can be estimated only by those who have been compelled to unlearn a science that they might at length begin to learn it." β In "Tait's 'Thermodynamics'", 1878 <https://doi.org/10.1038/017257a0>.
> "it is our part to provide for the diffusion and cultivation, not only of true scientific principles, but of a spirit of sound criticism, founded on an examination of the evidences on which statements apparently scientific depend." β Introductory Lecture on Experimental Physics, 1871 <https://archive.org/details/scientificpapers02maxwuoft>.
Michael Faraday discovered electromagnetic induction OTD in 1831 https://cromwell-intl.com/radio/balanced-line.html?s=mb #history #electromagnetics
tomsharpIn 1896, Guglielmo Marconi invented the first practical, long-range radio for transmitting Morse code. #Poetry #Science #History #Electromagnetics #MorseCode #Marconi (https://sharpgiving.com/thebookofscience/items/p1896b.html)
Aaron RainboltWell this is weird. Had an old scanner that refused to power on despite multiple unplugs and replugs. It was obviously getting power as I could see some activity that looked like a RAM check, but it wouldn't power on. Went over and switched off an audio amplifier on the same circuit... and then the scanner worked.