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  1. wdariusw

    Voltage from rotation

    The more coil inductance the more induced voltage in the coil ? And how about the current ? If i connected in series 4 coils with 10 Ohm resistance, and after rectification i have 400mV, so there is 10mA current (no load) ?
  2. wdariusw

    Voltage from rotation

    Just found very interesting film . Have bought it from ebay, next week hope to get it.
  3. wdariusw

    Voltage from rotation

    I do not want to use materials that magnets can attract. For cyclist it is negative force. Now resistance of coil with 0.2mm wire and 600 turn is 10 Ohm.
  4. wdariusw

    Voltage from rotation

    Just tried. Not good. Maybe magnets now are too far each other. Need to find perfect position between them. And there i think software like quickfield should help..
  5. wdariusw

    Voltage from rotation

    Ok, now will try it and see what happens :)
  6. wdariusw

    Voltage from rotation

    Adam, i need achieve best result for 1 rotation per second, so increasing speed will give better results, but they would almost never achieved in real life system. There are more programs, like QuickField student edition, there are limetid mesh size to 255, program is free. But i can't work it...
  7. wdariusw

    Voltage from rotation

    It is possible somehow do somethink like this http://www.comsol.com/blogs/simulating-permanent-magnet-generators/ ? Animation with graphs
  8. wdariusw

    Voltage from rotation

    Hi Adam, thanks for helping ! Here I found calculator for Gauss at certain distance https://www.kjmagnetics.com/calculator.asp . Can you give me link where you found fi1*80% formulla ? Do not understand what it means, why 80 % ? Another thing, i think that there should be formulla with coil wire...
  9. wdariusw

    Voltage from rotation

    Maybe anyone know how to work with comsol , maxwell, quickfield etc. and do simulations of that system?
  10. wdariusw

    Voltage from rotation

    But here thinner wire than 0.2mm would help or not?
  11. wdariusw

    Voltage from rotation

    I can buy 0.063mm cooper wire, but my thought here - voltage increases, but current decreases ? Or not ?
  12. wdariusw

    Voltage from rotation

    Today all day I spent with research and experimentation. I got this energy harvesting kit http://www.ti.com/lit/ug/sluu654a/sluu654a.pdf . There are written boost converter starts when >=300mV is in the input. When i connected my rectified voltage (400mV) , it drops under 300mV and the board do...
  13. wdariusw

    Yes another NEWBIE question!

    I have this one http://www.ebay.com/itm/280924194031?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT . Works great. But there are cheaper modules, like this...
  14. wdariusw

    Voltage from rotation

    Hi. Tried this today,but the voltage is much lower...So it is not right positioning for my design. Today got bigger bigger magnets for another form (post #21 left picture). Winded 2 more coils with 0.2mm wire and 600 rotations. Did full wave bridge rectifier, and got little more than 400mV DC, I...
  15. wdariusw

    Voltage from rotation

    Will draw it maybe tommorow. Now i'm in hospital..:-/
  16. wdariusw

    Yes another NEWBIE question!

    Yes there are. And every of them works fine:-)
  17. wdariusw

    Voltage from rotation

    What king of diode? I think i need something attach on the magnetic circle, and with something watch it.
  18. wdariusw

    Yes another NEWBIE question!

    Yes, similar. Try to make simple uart communication with two microcontrollers wired with leads firstly.
  19. wdariusw

    Yes another NEWBIE question!

    You need as many RF receivers and MCU as motors. Also one master MCU and RF transmitter. Hm..maybe buttons for every motor command. If you know nothing about uart, or you have no programming skils, it will challenge to you. Firstly do it with one motor.
  20. wdariusw

    Yes another NEWBIE question!

    Oh....so if you have 10 separated motors,you need 10 MCU! RF modules are cheaper than bluetooth. And other thing, if every motor will have separate bluetooth,every time you need to connect with it. I think here infrared is best for short and RF for long distances. And with who you will controll...
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