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1  Using Arduino / General Electronics / Re: arduino theremin parts required and help on: February 16, 2013, 07:47:53 am
Can someone help me sort out this prob. ?
2  Using Arduino / LEDs and Multiplexing / Re: 24x LEDs with individual P/S2 keyboard inputs? on: February 14, 2013, 03:52:30 pm
Here's an instructable of your PS/2 keyboard input to LEDs output...
http://www.instructables.com/id/PS2You-Go-anywhere-LED-digital-message-board/

Not exactly what you want,but I think it would be fine for you,or it might solve you query on making of your own LEDs display of keyboard inouts.
3  International / India / Re: Cheap accelerometer in India on: February 14, 2013, 03:14:02 pm
You should search for it yourself only,as local dealers offer components at much lower price then people who sell online.
btw,I know few websites who sell stuff like this online,but haven't checked on it yet whether your product is available there : element14,explorelabs,thinnkware,vegarobo

But,instead of buying it online,I highly suggest you to buy it from a local shop,in case if it is not available there,then buy it online.
4  Using Arduino / General Electronics / Re: arduino theremin parts required and help on: February 14, 2013, 01:07:28 pm

I could, but I'm sure you can do that too  smiley-wink  [ you will need to identify a good component supplier though - I'd suggest Farnell or associates, but it varies by territory ]

What do you mean by "farnell or associates" ?
BTW,I made the schematic using circuit lab,here it is https://www.circuitlab.com/circuit/dx43y5/arduino-theremin/,values in the schematic are not so correct(ignore them).

Correct me if I am wrong somewhere about the required components:
  • 2x Resistors ,each of 100k ohm
  • Capacitor C1 of value 150p of type NP0
  • Capacitor C3 and C4 of value 10p
  • Capacitor C2 of value 100n
  • Inductor L1 of value 10uH
  • IC1 {unknown mystery}
What IC is to be used,I still do not get it,the values are correct? and the schematic I made is also right?
The antenna made of wire is to be connected from "ANT" to "F _OUT" nodes?
The Male header pins are to be connected to +5V,2 ground connectors,and Vin
What is to be connected to Vin,the F Out or what?
5  Using Arduino / General Electronics / Re: arduino theremin parts required and help on: February 14, 2013, 05:32:58 am

The other components won't be critical compared the the LC - the principle of operation is that the "antenna"
acts as a variable capacitor in parallel with the fixed capacitor and thus hand position will vary the total
capacitance in the LC circuit, shifting its resonant frequency. 

Very well,thanks, now I understand it.

But,could you post a list of components what are required exactly?
6  Using Arduino / General Electronics / arduino theremin parts required and help on: February 13, 2013, 11:33:37 am
I am a newbie to arduino,though I had worked on few simple projects like 4x4x4 LED cube,LCD display etc. so I am well aware about arduino and how to use it.
Straight to the point,I had gone through an article about making an arduino theremin here : http://interface.khm.de/index.php/lab/experiments/theremin-as-a-capacitive-sensing-device/
There,the author had posted the working and all...
I want to know what exactly the parts are required,can someone post a list of what and howmuch the components are required,as the schematic diagram does not strike me.
His schematic is quite complicated,if someone could design another schematic using fritzing or https://www.circuitlab.com/ or anyother service and post it here,it would be great help.
He has explained all about how it works,but actually I still do not get it how could just a 5mm wire sense how near a hand is and...

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