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Magnet Shake Light

Organisation d'un workshop en collaboration avec l'association DIY Geneva

Status

Status du project
Date de début 01/05/2016
Status work in progress, first prototype working
Initiateur(s) Sebastien C. (sinux) , Charlie, Michael J. , Adeline (DIY Geneva),…

Description

Organisation d'un workshop en collaboration avec l'association DIY Geneva.

Fabrication d'une lampe solide et sans piles.

To Do

  • faire un prototype Done
  • choisir un design et les matériaux
  • faire des tests avec l'electronic In progress

Documentation et schéma

Premier prototype

On est parti sur un magnet de Ø10×40 (N40) et un bobinage en AWG30 (~Ø0.25x60m) sur 40mm de long. Le diamètre de la bobine est de Ø13.25 (int à ~Ø19 ext). L'alésage est de Ø10.25 (il y a quand même un effet de piston) et la course de l'aimant est d'env.135mm. Aux deux extrémités, il y a 2 bouchons avec deux petits aiments de Ø5×7 qui servent d'amortisseurs.

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Bobinage

En utilisant une viseuse il a quand même fallut 1h15.

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Premières mesures


Moving the magnet manually through the coil at two different speeds - since the induced voltage is related to the speed, slower velocities result in smaller peak-to-peak voltages:

Dropping the magnet through the coil, with a lower magnet acting as a spring - so that the voltage gradually dies off as the magnet stops bouncing up into the lower part of the coil:

How do we evaluate the output of the coil, in order to predict the power available for illumination? The oscilloscope is a key tool, allowing us to measure the voltage drop across a resistor which is connected to the two ends of the coil.

Material

Liste de fournitures

  • Delerin Ø20×160
  • mèches extra longues Ø10.25
  • wire AWG 30 ~60m
  • rectifier bridge
  • LEDs
  • resistance
  • capacitor

Design Considerations

What constitutes a successful flashlight design? Perhaps one which has both good ergonomics and delivers a reasonable amount of light for a given amount of shaking (so the number of minutes of shaking required to provide a minute of light?) - if we need to shake too much for the lighting reward delivered then we worry that the user will be less than satisfied with the performance, and the flashlight will lie un-utilized. Faraday's Law tells us that certainly the strength of the magnet, the number of turns in the coil, and the speed that the magnet travels through the coil are important parameters… but what other details must be taken into consideration?

  • the diameter and length of the magnet - thick or thin, long or short?
  • the length of the coil - particularly, what should the length be compared to the length of the magnet?
  • the travel distance of the magnet - the magnet must fully leave the coil, and perhaps travel no further?

Participants

Interested in joining this project/workshop
Nomparticipation activeparticipation passivesuivre de loins
Sebastien CHASSOT2016-03-06 14:01:35  
Michael Jaussi2016-03-11 17:22:39  
Julio 2016-03-18 19:48:38 
Charlie2016-05-16 14:30:20  
 31

Liens externes

projects/magnet-shake-light.txt · Dernière modification: 2016/05/16 17:47 par csellers42