Levitating Lamp

Community Projects
1

My son is trying to reproduce the Levitating lamp that Alex from Spark Fun made.

https://www.sparkfun.com/news/2234

We see the schematic drawing on github but my son is 9 and not an electrical engineer so he needs a little help with the parts.

https://github.com/awende/Levitating_Light

A parts list would help.

Thanks for any help!

Beth and my son is Owen

2

I replied to your comment, but here is the list again.

Parts List:

  • - [[LM358 Op Amp](https://www.sparkfun.com/products/9456)
  • - [[10k Ohm Trimpot](https://www.sparkfun.com/products/9806)
  • - [[10k Ohm Resistors](https://www.sparkfun.com/products/14491)
  • - [[0.1uF Capacitor](https://www.sparkfun.com/products/8375)
  • - [[N-Channel MOSFET 60V 30A](https://www.sparkfun.com/products/10213)
  • - You will also want to get heatsinks for the MOSFETs:
  • - [[Heatsink TO-220](https://www.sparkfun.com/products/121)
  • - [[Heatsink Compound](https://www.sparkfun.com/products/9599)
  • - [[4-40 Screws](https://www.sparkfun.com/products/10452)
  • - [[4-40 Nuts](https://www.sparkfun.com/products/10454)
  • - [[3W LED](https://www.sparkfun.com/products/13105)
    • [/list][/list]

    (below are parts we don’t sell)

  • - D1 = [[1n4007 Diode Rectifier](https://www.digikey.com/product-detail/en/vishay-semiconductor-diodes-division/1N4007-E3-73/1N4007-E3-73GICT-ND/3025817)
  • - D2 = [[1n4148 Schottky Diode](https://www.digikey.com/product-detail/en/on-semiconductor/1N4148TA/1N4148TACT-ND/1532747)
  • - L1 = [[1mH Inductor](https://www.digikey.com/product-detail/en/bourns-inc/1140-102K-RC/1140-102K-RC-ND/2534469)
  • - Neodymium Magnets... Alex said he used what was lying around. You can probably find these at your local hardware store (*I've seen them at Lowes and Home Depot in our area before*).

    • ](https://www.digikey.com/product-detail/en/bourns-inc/1140-102K-RC/1140-102K-RC-ND/2534469)](https://www.digikey.com/product-detail/en/on-semiconductor/1N4148TA/1N4148TACT-ND/1532747)](https://www.digikey.com/product-detail/en/vishay-semiconductor-diodes-division/1N4007-E3-73/1N4007-E3-73GICT-ND/3025817)](https://www.sparkfun.com/products/13105)](https://www.sparkfun.com/products/10454)](https://www.sparkfun.com/products/10452)](https://www.sparkfun.com/products/9599)](https://www.sparkfun.com/products/121)](https://www.sparkfun.com/products/10213)](https://www.sparkfun.com/products/8375)](https://www.sparkfun.com/products/14491)](https://www.sparkfun.com/products/9806)](https://www.sparkfun.com/products/9456)

    3

    Dang… I forgot the [hall effect sensor.](https://www.digikey.com/products/en?mpart=SS494B&v=480)

    4

    Awesome! Thank you!

    5

    Owen has the levitation circuitry and the power receiver circuit all wired up with the exception of a few questions:

    What is the procedure for finding the resonant frequency? I have a function generator, how do I connect it to the circuit? How do I tell we have hit the resonant frequency?

    The levitation circuitry diagram mentions putting the capacitor close to ic1, but I do not understand where this would be?

    What is the procedure for wiring the hooking up the power supply? Owen watched your video tutorial on “How to Power a Project”.

    What is the current at the 5V and 12V locations?

    Thanks in advance for any help!

    6

    Anyone else trying to follow this thread, AlextheGiant has responded under the comments of the blog post:

    [https://www.sparkfun.com/news/2234#comment-5d23c74a33766d4ad6499ef3](Enginursday: Levitating Light - News - SparkFun Electronics)