Hi folks!
I'm thinking of making a low power amplifier and I've realized I have
an old satellite receiver enclosure that I'd like to put to good use.
The front side has two pushbuttons (up,down) and an On/Off switch.
I would really like to reuse the switches for volume control and there
came an idea to implement a digital pot like DS 1802. This product
is the closest thing to ideal in my view, only thing I don't know is how to
to wire it to a 3 digit 7 segment display and program it to display
sound level corresponding to its setting. Pot has 65 positions and I
was hoping the display would show 0,-1,-2......-64 and the last mute.
I have nothing against learning a simple enough language if I really
have no other choice but to burn a chip myself.
Thank you!
I'm thinking of making a low power amplifier and I've realized I have
an old satellite receiver enclosure that I'd like to put to good use.
The front side has two pushbuttons (up,down) and an On/Off switch.
I would really like to reuse the switches for volume control and there
came an idea to implement a digital pot like DS 1802. This product
is the closest thing to ideal in my view, only thing I don't know is how to
to wire it to a 3 digit 7 segment display and program it to display
sound level corresponding to its setting. Pot has 65 positions and I
was hoping the display would show 0,-1,-2......-64 and the last mute.
I have nothing against learning a simple enough language if I really
have no other choice but to burn a chip myself.
Thank you!
Last edited:
Hi Guys
Have a look at this device from TI. It is best used in balanced form, so you need a SE-balanced circuit going in then a diff amp coming out. This greatly reduces the THD if that is important to you.
Have fun
Have a look at this device from TI. It is best used in balanced form, so you need a SE-balanced circuit going in then a diff amp coming out. This greatly reduces the THD if that is important to you.
Have fun
So far I have found out that one of the ways to control a seven segment
led display is to program a microcontroller, for example an 8051 which
means that one would have to have some clue about programming and
the book that covers basics and more than that costs about 80 bucks.
Perfect, in a year or two or a decade i'll be able to lit the thing myself
and I'll come back here and explain it all to you, maybe. Super!
led display is to program a microcontroller, for example an 8051 which
means that one would have to have some clue about programming and
the book that covers basics and more than that costs about 80 bucks.
Perfect, in a year or two or a decade i'll be able to lit the thing myself
and I'll come back here and explain it all to you, maybe. Super!
There are lots of examples for display with Arduinos. https://www.arduino.cc/ They will control a TI PGA23xx pot as Struth suggested. An IR receiver can easily be added for remote control to make it work even better. There are lots of I2C controlled LCDs and seven segment display available cheap too.
https://www.adafruit.com/product/878
https://www.adafruit.com/product/878
I designed a USB mixer with digital volume controls.
The PC controlled the pots via USB.
It was an interesting project.
I learned a lot about how to use digital pots.
I got caught out a bit with the biasing as they must be biased around 2v5.
The PC controlled the pots via USB.
It was an interesting project.
I learned a lot about how to use digital pots.
I got caught out a bit with the biasing as they must be biased around 2v5.
Thanks guys. The very idea of programming chips or anything
connected with it is terra nuova for me so forgive me for being
slow about it. Yesterday I found out about arduino things for the
first time.
I was browsing Elektor web and I ran into multiple possibilities.
A bit overwhelming for now. I ought to find a source of information
that would describe things in a logical way so I can figure out for myself
how to or whether or not to proceed. I'm too old to waste my time on
something that may turn out not to be worth the trouble at all. We'll see,
said the blindmen.
connected with it is terra nuova for me so forgive me for being
slow about it. Yesterday I found out about arduino things for the
first time.
I was browsing Elektor web and I ran into multiple possibilities.
A bit overwhelming for now. I ought to find a source of information
that would describe things in a logical way so I can figure out for myself
how to or whether or not to proceed. I'm too old to waste my time on
something that may turn out not to be worth the trouble at all. We'll see,
said the blindmen.
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