Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Multiple ADC channels in adc ATmega16

Status
Not open for further replies.
prajankya

prajankya

Newbie level 3
Joined
Apr 25, 2012
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,301
Hi,I want to design a usb audio mixer based on "GNUSB" but it gives only 6 inputs..
I want to design with more inputs since I don't need 10bit precession, n it will be useful since it is a mixer,more Pots means more controls...

If by any means I could use 2 to 4 pots per pin, it will not affect much on precession for they are simple 270 degree pots... I just want minimum of 10 readings thorughout a pot..

I cant use multiplexers here... Sorry there...

Anyone could help me please??
 

You could use some of the digital inputs. If you use the potentiometer to control the pulse width of a 555 oscillator (or similar), you can feed the output from the oscillator into a digital input, and use software to calculate the pulse width.

Harry Lythall used that approach to code 6 analog signals on one digital channel for a remote control system. Details are **broken link removed** and **broken link removed**. His homepage is here.
 
Great Idea.. It works, though I have to try it out for usb yet,but it works,..

But I thought of breaking that 10bit precession to 5bits...

means when in range of 0-5v, I get digital output of 0-1023 , n now I want out of 0-32...

That means now I have only 6 pots for 6 pins of 1024 resolution,but if possible, I can break that into 32 pots per pin, i.e. 192 pots for 6 pins of 32 resolution..

it will be a boon for making mixers...!!!

but please say, is it possible?? anyhow??
 

No, you can only connect one pot to one analog input, unless you use multiplexing. btw, I thought the GNUSB had 8 analog inputs, not 6?
 

godfreyl said:
You could use some of the digital inputs. If you use the potentiometer to control the pulse width of a 555 oscillator (or similar), you can feed the output from the oscillator into a digital input, and use software to calculate the pulse width.
Click to expand...

Thanx godfreyl... It works as charm... :smile:
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top