Levitating bulb

[Bhuvana Bairy]

We will be needing :
1. 2 AD22151 (Hall sensors) - Rs.614.25x2
2. Electromagnet with a ferromagnetic core - donno
3. 0.5" diameter neodymium magnets - donno
4. 555 timer (for square wave generation for the transformer) - Rs.50
5. Air core resonant transformer with primary and secondary of 320mH -
donno
6. Capacitors (about 5), Resistors(about 20),10 white LEDs - Rs.100
7. 2 Differential Amplifiers. - Rs.20x2
8. Atmel ATtiny26 - Rs.300 / Arduino / MSP
9. 8-DIP NEC8601(optoisolators) - donno
10.1 LMD18200 - Rs.250
11. DC supply
12. Wires.

[Anirban Ghosh]

Is it possible for u to mail a schematic/ block diag of the same.wanna know where each part goes.

[Bhuvana Bairy]

This has all of it :  http://bea.st/sight/levitation/

[pavan k shetty]

I suggest you find the cost for all of that asap. Some of the parts may be expensive

On Sat, Apr 14, 2012 at 12:51 PM, Bhuvana Bairy <bhuvana...@gmail.com> wrote:

This has all of it :  http://bea.st/sight/levitation/

--
regards
Pavan K Shetty

3rd Year Btech 

ECE

NITK Surathkal

[Bhuvana Bairy]

Yea, i searched on sites, they dont have costs as such. Ill look again!

[Adarsh Hasandka]

For rough estimates, check element14 they are a little pricy, but you should get a good idea as to the cost of the device.

[Bhuvana Bairy]

I just summarized whatever is there on the website, will be meeting Sripathi sir tomorrow. WIll try and get some components from the department.

[Bhuvana Bairy]

And ill put up the budget thingy tomorrow after meeting with sir.

[Snehasis Despande]

i went through your doc and the idea is really good has anyone tried the circuit before or we will be doing from scrap. I think its doable!!

 

Snehasis Despande
B.Tech 2nd Year
Electrical And Electronics Department
National Institute Of Technology, Karnataka, India

---

From: Bhuvana Bairy <bhuvana...@gmail.com>
To: tech...@googlegroups.com
Sent: Sunday, May 13, 2012 8:43 PM
Subject: [Technites:35] Re: Levitating bulb

[pavan k shetty]

Wireless power transmission(low efficiency) has been done in the ECE dept,but levitation hasnt been done in college.

[pavan k shetty]

I checked the cost of a few of the above parts in SP road. They are as follows.

• Winding wire,18 gauge: Rs 10/metre (less if we buy >5m)
  
• Neodymium magnets (1cm dia)  :Rs 18/magnet (have bought 9)
• Optocouplers                             :Rs 8
• Hall effect sensors(3 terminal transister):Rs 20 (http://ec2-174-129-232-50.compute-1.amazonaws.com/3%20terminal%20hall%20effect%20rotary%20sensor-datasheet.html)
  

All the parts on the site maynot be easily available. So you should look in to alternatives as well,if required.

[Anirban Ghosh]

What kind of opto couplers have you bought? Are they MOC 3041? from Motorola?

[pavan k shetty]

Haven't bought. Om was outta stock. Looks like you bought their last

[Anirban Ghosh]

I din buy from om. I got from the small shop opposite NSK. But even NSK will have. They cost Rs 14 a piece as far as I remember.

[Leela Prabhu]

om has some too... white 8 pin ones... 5 to 12V kind?

On Sun, May 20, 2012 at 10:02 PM, Anirban Ghosh

[Anirban Ghosh]

On the input side, they can be run by 5V with a current limiting resistor. On the other side, it can take about a hundred volts or more I think. Just download the data sheet if you wanna know. What I found useful about these particular ones is that they have triac outputs, so the current can be bidirectional.

[Bhuvana Bairy]

Hey, I will be going to blore in the next weekend and planned to visit SP road then.

Will be making the electromagnet bit and that needs :

enameled copper wire - 30m : 240/-

a suitable core, hoping a relative permeability of atleast 100, dia 6cm

and 9 more magnets than what paksa has bought already - 18/- per magnet

I dont know the cost of the electromagnet, as its not given on the website anywhere. If i get a relative permeability of more than 100, then the length of the wire will reduce automatically.

I wanted to know how much I could spend on the core.