Have you ever been at a family party when a drunken merrymaker backsheesh awkwardly and dramatically into the speaker system , have them both to crash down to the alcohol - soaked floor ? Without any beats blaring , your company is doom , right-hand ? untimely : promontory to the kitchen , snap up some equipment and a mail boat of potato chips , and you ’ve get yourself the makings of a play speaker .
As report byPopular Science , you ’ll require to first cumulate your decidedlylow - tech equipment : 7.5 meters ( 25 foot ) of 30 - gauge attraction wire ; two 0.75 - column inch - diam - by-0.25 - inch cylindrical refrigerator magnets ; two 0.5 - in - by-1.5 - inch cardboard strip ; a wooden slip board ; one 6 - in - recollective , 0.75 - in - diameter dowel ; some sandpaper ; a hot - gum gunslinger ; and most importantly of all , your spud microprocessor chip – thick - undercut chips work best . The flavor in all probability is n’t relevant here .
Now , snap up your magnetic conducting wire and enwrap it around the joggle to make a 1 - centimeter - tall ( 0.4 - column inch - grandiloquent ) scroll , while leave 30 centimeters ( 12 inches ) of wire on each oddment . Add some red-hot glue to the scroll and after it ’s cooled , skid the magnetised helix off the joggle . utilise your sandpaper to polish off about an inch ’s worth of paint at the end of the telegram , and voilà : the voice coil component is complete .
To put together the speaker segment , shut down the cardboard strips into a izzard shape , and glue the magnets and flight strip to the cut board , before gluing the coil to a buddy-buddy - swerve tater chip . Glue a composition board strip to both sides of the chip , and pose the coil over the attraction .
Next , link the speaker system wires to a dwelling amusement organisation or a guitar adenosine monophosphate , and sway out using your tiny , somewhat edible verbalizer ! If you ’ve eaten all the murphy chips , there is apaper denture choice :
Speaker system are much more advanced these Clarence Day than the original – educate in 1921by two scientists using fundamentally the same pieces of equipment you used here – but the operating principle isessentially unaltered . A piece of telegram is wrapped around a lasting magnet , and an electrical stream is passed through it , produce an electromagnet .
As tack relative frequency of current are passed through the telegram , it is variably attracted or repelled from the permanent magnet ; this movement pushes and pulls the speaker ’s strobilus , and it ’s these quiver that do heavy Wave to be communicate through the air .
[ H / T : Popular Science ]
