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  1. LazyBoy

    Need help with android app for Bluetooth device

    No it is fitted inside a special 2 piece metal spinning top, please see attached photo.
  2. LazyBoy

    Need help with android app for Bluetooth device

    Hi Stari, I need an app that reads the Mbientlab MetaWear C Bluetooth module then uses a mobile device to display the max spin speed (up to 3,300 RPM) + live spin speed + amount of full 360 degree turns + spin time using the modules gyro or accelorometer. The main problem is that the module's...
  3. LazyBoy

    Where can I buy a 20,000°/sec gyroscope?

    Thank you but unfortunately I think that the 20,000dps gyro's are 5 volt?
  4. LazyBoy

    Where can I buy a 20,000°/sec gyroscope?

    Have you got a link, please?
  5. LazyBoy

    Where can I buy a 20,000°/sec gyroscope?

    Hi Guys I am looking for a 20,000 degrees per second gyroscope but it must run off a 3 volt button cell. Any ideas where I can buy one from? Thank you
  6. LazyBoy

    Can anyone help help me with a Gear Ratio?

    So if the users fingers are the drive element how would you describe the drive system's different ratios/gearing?
  7. LazyBoy

    Can anyone help help me with a Gear Ratio?

    So could you call this difference between the 4mm and 12mm spindle and the users fingers a gearing ratio?
  8. LazyBoy

    Need help with android app for Bluetooth device

    Hi, I have bought a Mbientlab MetaWear C Bluetooth module and need help building an android or ios app to display 3 pieces of data from the module to a mobile device. Anyone here have any knowledge of the above hardware?
  9. LazyBoy

    Can anyone help help me with a Gear Ratio?

    So sorry guys. I am trying to work out the advantage or disadvantage of having two identical toy spinning tops (like inception tops) except one top has a 4mm diameter spindle and the other has a 12mm diameter spindle? I am guessing the gearing from along the users finger/thumb is the...
  10. LazyBoy

    Can anyone help help me with a Gear Ratio?

    So how could I explain the advantage or disadvantage of having a smaller diameter spindle over having a larger diameter spindle? Is this correct: 4mm to 34mm = 1,000rpm / 30 = 33.3 circumferential rate ? 12mm to 34mm = 1,000rpm / 22 = 45.4 circumferential rate ?
  11. LazyBoy

    Can anyone help help me with a Gear Ratio?

    I think that I am not explaining myself very well here, sorry M. Am I talking about rotational speed ratios? So if the rotation speed of the 4mm diameter rod is 1,000rpm the 34mm diameter rod would be 33.3rpm?
  12. LazyBoy

    Can anyone help help me with a Gear Ratio?

    Errr but if the 4mm outside diameter end of the rod is spinning at say 1,000 rpm then the 34mm outside diameter other end of the same rod must be spinning slower, yes/no? 4mm to 34mm = 1,000rpm / 30 = 33.3 ratio? 12mm to 34mm = 1,000rpm / 22 = 45.4 ratio?
  13. LazyBoy

    Can anyone help help me with a Gear Ratio?

    Hi, I have 2 solid spinning rods: Rod 1 has a diameter of 4mm at one end and 34mm at the other end. Rod 2 has a diameter of 12mm at one end and 34mm at the other end. Can anyone explain or tell me the gearing ratio for each rod? Very much appreciated. LazyBoy
  14. LazyBoy

    Measuring the speed of a Frisbee & Boomerang

    If all goes to plan, I will post you the link to buy them ;)
  15. LazyBoy

    Measuring the speed of a Frisbee & Boomerang

    Something like this: https://www.kickstarter.com/projects/guardyen/tiny-bluetooth-sensors-so-you-can-make-and-connect $55 + P&P
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