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

Schematic for amp

Parts

Part
Total Qty.
Description
Substitutions
C110.1uf Ceramic Disc Capacitor
U11DS1669 Digital Pot IC (See Notes)
S1, S22Momentary Push Button Switch
MISC1Board, Wire, Socket For U1

Notes

  1. U1 is available from Dallas Semiconductor.
  2. S1 turns the volume up, S2 turns it down.
  3. The input signal should not fall below -0.2 volts.
  4. 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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Ehma Onwuka
Digital Volume Control using ICDS1669
Monday, November 14, 2016 7:39:56 AM
This is quite interesting but unfortunately, the IC 1669 is scarce. Difficult to find in the market. I leave in Nigeria. Please is it possible to find a replacement so I can try this interesting project. Thank you and God bless.
satpambobo
Digital Volume Control
Friday, August 05, 2011 9:38:53 PM
i dream use binary count up and count down IC (74??? or 40???) to control R2R Ladder Digital to Analog Converter 4 bit which Build from Resistors and Digital Switch 4016 ( internal 4 switch). this only my design not tested yet, so you have volume step 0..15. this is a challenge, go ahead build this.. :)
birungi Travol
Digital Volume Control
Tuesday, March 08, 2011 6:52:04 AM
I am in Uganda but it is difficult to get (DS1669), can please get another substitute for that DS1669.
awais
Digital Volume Control
Thursday, October 14, 2010 8:12:57 AM
This ic is not available in pakistan ? can we use another ic in this circuit
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
aJoseh Mhartnonymous
Digital Volume Control
Wednesday, April 23, 2008 9:20:57 PM
I really need this...Im thanking you guys for paging it into your web...this is great and very useful...
anonymous
Digital Volume Control
Friday, April 11, 2008 2:51:22 PM
i really need a volume control mines gone =(
Jason Marshall
Digital Volume Control
Friday, February 15, 2008 3:01:59 PM
Hi There I am looking for a way to control the "Bride of Zen" pre-amp circuit so the I can replace the potentiometer at the end with a digital potentiometer or something similar. I would eventually want to control the volume via a microprocessor. Any ideas what I can do here. The voltage swing over the pot is 20V, and I find it hard to find digital pots that provide higher voltage support. Regards Jason
peter
Digital Volume Control
Sunday, February 03, 2008 10:04:47 PM
Now i like to test this circuit , I like small circuit design , but i don't know this one is perfect or not . But i like small and easy design
specky
Digital Volume Control
Sunday, January 13, 2008 3:20:27 PM
i think it would make a very good volume control but how about using it to control treble and bass of an amplifier. hey u all out there i need friends especially those interested in electronics so write if u're interested.
Audioguru
Digital Volume Control
Monday, January 07, 2008 3:13:24 PM
This project doesn't work because the IC is not biased correctly. The variable resistance must be DC biased at about half the supply voltage. It is easist to do if it has a positive and negative supply, then the resistance can have its low terminal connected to 0V. Its max allowed total supply voltage is 8V. It has linear steps, not logarithmic so it makes a poor volume control. It is good as a linear tone control. Stereo logarithmic digital volume control ICs are available.
myfinalproject
Digital Volume Control
Wednesday, December 12, 2007 11:01:59 AM
I have make the circuit and using ds1669~10k. but the sound is not good and too slow. I can't hear anything except noise..can someone help me???
Blessings Makoza
Digital Volume Control
Monday, November 26, 2007 1:05:16 PM
I'm really fascinated with the circuit diagram, but I'm not finding the specified IC. Would you please let me know if there is any other alternative to it or another circuit diagram for volume control? I may also need a digital equalizer circuit diagram that would accompany the circuit. Thanks: I appreciate your works and projects.
anonymous
Digital Volume Control
Sunday, November 18, 2007 4:18:10 PM
If you want a sample od 1669 you can go to maximic.com and get a sample
anonymous
Digital Volume Control
Thursday, October 18, 2007 4:13:22 AM
This circuit performs the task of volume control, no external control is needed. Read the notes.
anonymous kipindura shabani
Digital Volume Control
Tuesday, October 16, 2007 8:44:16 AM
how could I design didital volume control by using descrete component like transistor,resistor,inductor and capacitor instead of using ICs.If possible send to me a circuit diagram.
just wana know
Digital Volume Control
Saturday, September 22, 2007 4:34:12 PM
I do like this project. So i will like to build it. But the problem is that how it work. Eg do i have to get a volume control attach to the input? The resistance of the IC either 100k,50k or less. Any way can i use equivalent one.
raoul
Automatic gain control
Wednesday, September 12, 2007 8:40:40 AM
Once built a circuit from a banabi book that increased the audio signal when passages of music were quiet and decreased them when they were loud - I think it was called an audio limiter or compander and was for stereo signal processing and built around one chip and required few componants - a resister controlled how course the effect was . Have you come across this diagram could you email me a copy please !
p.p.joel
Graphic equalizer
Tuesday, September 11, 2007 11:50:19 AM
Can you kindly help me get a circuit on Graphic Equalizer. I would like to do a project on it. Grateful l if you do help me out.
Bogdan
Digital Volume Control
Thursday, September 06, 2007 11:01:53 AM
me romanian and do not speak very good englis Give me please one Schematic for 1 amplifier for car 2 x40 and one Schematic for preamplifer thanks :)
himanshu
Digital Volume Control
Friday, August 03, 2007 3:08:25 AM
i m in rajasthan, india i m not getting the IC DS1669
I.W.
Digital Volume Control
Wednesday, August 01, 2007 5:10:31 AM
How can I control audio volume for balanced audio output using DS1669? How 's the circuit like?
Bogmis Nlebe Joseph
Digital Volume Control
Friday, June 22, 2007 12:52:17 AM
good morning. i want you to send me the subtitudes of DS1669 witch I can find easy.please to my very bad english.thank you
anonymous
Digital Volume Control
Wednesday, June 20, 2007 6:21:23 AM
where can i buy this ic DS1669 in the philippines?
Jr
Digital Volume Control
Monday, June 18, 2007 3:00:41 AM
I live in indonesia and i can't found Ds 1699, can i get the similar ic for use?
Wahyu
Digital Volume Control
Tuesday, June 12, 2007 5:07:17 AM
I'm very confuse to find type IC DS 1669. Please, Maybe you can inform me about equivalen that IC. I live in jakarta, Indonesia. Thanks you. Regards, Wahyu
anonymous
Digital Volume Control
Friday, June 08, 2007 9:58:29 PM
if you go to Maxim-ic.com you can get free samples.....Ive got ten DS1669 for free.....It really works

(Editor's notes: Please don't abuse the free sample policy.)

Lem
Which flavour?
Friday, May 25, 2007 12:51:32 PM
Hi, I noticed that DS1669 comes in 3 flavours: 10K, 50K and 100K, which one best meets amplifier needs (I want to use TDA8560Q).
IUdit
Digital Volume Control
Thursday, May 24, 2007 2:17:22 PM
the output that comes from ure player....i.e., the audio in has 2 wires...one is ground...ignore it(or connect it to grnd!!)....connect the other one.....n similarly.....the single audio output shud be connected to one terminal of the speaker....n the other terminal to a ground source...think thts clear now......
aina
Digital Volume Control
Sunday, May 20, 2007 9:23:44 AM
i want to have all informations about this circuit. can you help me?
anonymous
Digital Volume Control
Wednesday, May 09, 2007 12:53:22 AM
all you do is have a double input and double output momontary switch as aposed to one then double the circuit up with another ds1669 and bang you got a volume controll for stereo
hamid
Digital Volume Control
Saturday, May 05, 2007 11:35:44 AM
do you had this ic : DS1669 Digital Pot IC
Almara
Digital Volume Control
Saturday, April 14, 2007 2:47:57 PM
How do i connect the audio in and audio out if i want to apply this to a stereo system? I just want to change my analog volume control into a digital one.
Cyberpol
Digital Volume Control
Monday, April 09, 2007 11:12:40 PM
If you see the datasheets of this DS1669 Digital Pot IC , this circuit can be used with only one botton. First press, volume up. Second prees volume down. Very good!!!
ramesh
Digital Volume Control
Saturday, April 07, 2007 1:05:55 AM
whar i get DS 1669 Ic.in visakhapatnam,ie india,andhra i m not getting
Jin
Digital Volume Control
Tuesday, April 03, 2007 2:26:03 AM
Nice Nice Nice...Bravo. 1 Question... How do i connect the audio in and audio out if i want to apply this to a stereo system? I just want to change my analog volume control into a digital one.
siva
Digital Volume Control
Friday, March 23, 2007 7:17:36 AM
it is very very nice
frank
Digital Volume Control
Thursday, March 08, 2007 2:31:07 PM
this is sick shit man
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