Digital Volme Control

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#2
Hello elnino86,

Try the PGA2310, PGA2311, and PGA2320 from Texas Instruments.

I don't know what your application is exactly, but any digital potentiometer with a LOG taper (or LOG scale) should be okay for an audio application. The PGA series from Texas Instruments is probably one of the best "suited" for audio applicaitons because of their bipolar outputs (when used with dual power supplies) and their very good noise and THD measurements.
 
#3
Just for pre-amplifier?

If you want to make pre-amplifier with volume controller, then I think it is recommended to use BB's product(PGA2310, PGA2311, Etc). These has different power range so that If you explain the a little information, then you can be recommended one of them.

I'll show you my work. This support the balanced input and output with unbalaned mode. ^^It controlled by remote controller and rotary encoder..Even it is controlled by USB-based PC Software.
 

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#7
elnino86,

I could possibly send you a few DS1666. What value do you need; 10k, 50k, 100k? DIP or SOIC?

Are there any kind of shipping restrictions from the US to Malaysia that you know of?

I also have some extra boards for a very small and simple PGA2320 volume control. This does require a dual supply though.
 
#8
theAnonymous1 said:
elnino86,

I could possibly send you a few DS1666. What value do you need; 10k, 50k, 100k? DIP or SOIC?

Are there any kind of shipping restrictions from the US to Malaysia that you know of?

I also have some extra boards for a very small and simple PGA2320 volume control. This does require a dual supply though.
Click to expand...

hye,im already got the DS1666 order from farnell.
🙂

But,it didnt work at my design.I use 2 push button to increase and decrease the volume.can you help me a little bit here?
 
#9
elnino86 said:
can you help me a little bit here?
Click to expand...

I don't think so. 😱

I was going to mention that I don't think the DS1666 can even be operated by push buttons. It needs a controller.

The DS1669 uses push buttons, but this is a linear digital pot and not a pseudo log like the DS1666.

Take a look at the DS1802, MAX5486, and MAX5456/7.
 
#14
Giaime said:
The DS1666 can work with pusbuttons and some glue logic, no need of microcontroller.
Click to expand...

That's a bit more complicated than just two simple switches and requires two extra active devices, but I guess it's easier than programming a micro.

Maybe I will see if I can get one of these working (not that I need it). I think I have all the parts.

Can one of the above circuits control two DS1666?
 
#17
analog_sa said:
Any number. If you intend saving the 555 you will need good telegraphing abilities 🙂 Apparently the joke above was lost.

A possible alternative to the 555 is a half wave rectifier but the rate of change may be too fast.
Click to expand...

I got the telegraphing joke, I was reffering to the circuit Giaime posted. 😱

Would it be possible for you to draw up how you did it with the 555 (plenty of these on hand)?

Thanks.
 
#18
Turned out it was half of 556 so pins will need to be corrected. Complete with a cheap skate PS.

I only used this for a day or two as it's way too masochistic to use push buttons with no position indication. Currently i use a rotary encoder with no indication again (box too pretty to drill extra holes) which is miles better. I find ARC style leds around a rotary knob simple and useful.

The entire reason i mess around with electronic pots is that balanced switched attenuators require way too much dedication and easily fuel audiophile neurosis. What switch? What resistors? What solder? Should i now replace all 160 resistors with bulk foils?

These are certainly inferior but dirt cheap and easy.
 

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