Digital Volume Control

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This digital volume control has no pot to wear out and introduces almost no noise in the circuit. Instead, the volume is controlled by pressing UP and DOWN buttons. This simple circuit would be a great touch to any home audio project.

Schematic

Parts

Part	Total Qty.	Description	Substitutions
C1	1	0.1uf Ceramic Disc Capacitor
U1	1	DS1669 Digital Pot IC (See Notes)
S1, S2	2	Momentary Push Button Switch
MISC	1	Board, Wire, Socket For U1

Notes

U1 is available from Dallas Semiconductor.

S1 turns the volume up, S2 turns it down.

The input signal should not fall below -0.2 volts.

Using a dual polariity power supply (+-5V works fine) will cure most clipping problems. You will have to check the data sheet for the correct pins to connect your voltages.

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Comments

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fernando ori Digital Volume Control Sunday, August 08, 2010 12:22:53 PM

Can I use This Circuit as a remote volume controller?as far as 300 meters with no 60 hertz hum?Is this IC available in the Philippines now?thank you and more power!

anonymous Digital Volume Control Thursday, March 25, 2010 10:56:46 PM

Jason, use 7805 or 7905 to reduce voltage to 5v

anonymous Digital Volume Control Friday, February 26, 2010 10:03:03 AM

I was going to try this circuit but the DS1669 is too expensive over $7 each. I am going to use the AD5228 at about $1 a pop and see if that works just as well.

csaba Digital Volume Control Friday, September 04, 2009 12:41:04 PM

4. Using a dual polariity power supply (+-5V works fine).. The maximum voltage between 8.pin and 5.pin is 8V!

Ehet Digital Volume Control Tuesday, July 14, 2009 9:48:56 AM

I thought to build an amplifier with an built in home made loudspeaker, so I thought I should use this volume control and the touch switch together with the amplifier:-)

shayo Digital Volume Control Friday, June 12, 2009 3:46:17 PM

I bealive you man bing up, I saw many things from your web which is simple and well aplicable .easily for study for the student like us ,so keepit up

BLACK3R Digital Volume Control Wednesday, October 15, 2008 4:33:48 PM

it thinks too easy :D

ankur Digital Volume Control Wednesday, September 03, 2008 11:26:52 AM

this concept is too good.... i m think to make a project on it...will u gie me full circuit diagram of this ckt.. i have some think on the site ""'http://www.electronics-lab.com/projects/audio/010/index.html "" but it is not quite enough..plz help me

anonymous Digital Volume Control Sunday, July 13, 2008 10:21:41 PM

Well I think the forum is down because it keeps freezing my browzer up. So i'll post here. Is this a quality IC or just a crapy one with lots of THD and poor control?

yahya Digital Volume Control Wednesday, June 11, 2008 4:30:33 PM

PLEASE what is the connection of audio in and audio out?or how should i connect the audio in and audio out ?. what kind of machines can i connect the volume controller

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fernando ori	Digital Volume Control	Sunday, August 08, 2010 12:22:53 PM
Can I use This Circuit as a remote volume controller?as far as 300 meters with no 60 hertz hum?Is this IC available in the Philippines now?thank you and more power!
anonymous	Digital Volume Control	Thursday, March 25, 2010 10:56:46 PM
Jason, use 7805 or 7905 to reduce voltage to 5v
anonymous	Digital Volume Control	Friday, February 26, 2010 10:03:03 AM
I was going to try this circuit but the DS1669 is too expensive over $7 each. I am going to use the AD5228 at about $1 a pop and see if that works just as well.
csaba	Digital Volume Control	Friday, September 04, 2009 12:41:04 PM
4. Using a dual polariity power supply (+-5V works fine).. The maximum voltage between 8.pin and 5.pin is 8V!
Ehet	Digital Volume Control	Tuesday, July 14, 2009 9:48:56 AM
I thought to build an amplifier with an built in home made loudspeaker, so I thought I should use this volume control and the touch switch together with the amplifier:-)
shayo	Digital Volume Control	Friday, June 12, 2009 3:46:17 PM
I bealive you man bing up, I saw many things from your web which is simple and well aplicable .easily for study for the student like us ,so keepit up
BLACK3R	Digital Volume Control	Wednesday, October 15, 2008 4:33:48 PM
it thinks too easy :D
ankur	Digital Volume Control	Wednesday, September 03, 2008 11:26:52 AM
this concept is too good.... i m think to make a project on it...will u gie me full circuit diagram of this ckt.. i have some think on the site ""'http://www.electronics-lab.com/projects/audio/010/index.html "" but it is not quite enough..plz help me
anonymous	Digital Volume Control	Sunday, July 13, 2008 10:21:41 PM
Well I think the forum is down because it keeps freezing my browzer up. So i'll post here. Is this a quality IC or just a crapy one with lots of THD and poor control?
yahya	Digital Volume Control	Wednesday, June 11, 2008 4:30:33 PM
PLEASE what is the connection of audio in and audio out?or how should i connect the audio in and audio out ?. what kind of machines can i connect the volume controller