Can a simple volume controller with PGA2310 do without programming a microcontroller?
I know nuts about programming but would like to build a volume controller to go with my Class-A Amp.
Can anyone provide me with a simple schematic of a 2-channel volume controller using a PGA2310? Hopefully no PICs or other chips that need programming needed. 3 push-buttons to control it; volume up, volume down and mute.
Thanks!
-Louis
I know nuts about programming but would like to build a volume controller to go with my Class-A Amp.
Can anyone provide me with a simple schematic of a 2-channel volume controller using a PGA2310? Hopefully no PICs or other chips that need programming needed. 3 push-buttons to control it; volume up, volume down and mute.
Thanks!
-Louis
Dallas Semiconductor makes some electronic pots that have built in controllers so all you need to connect are up and down buttons.
Yup, there's even leds output to indicate volume and balance
Good luck !
The amount of standard 7400 series logic you'd need to drive a PGA2310 makes it unfeasible. You;d have to have two 8 bit counters supporting increment and decrement, and some shift registers, and a clock.
I belive there was someone on DIYAudio that had made a simple kit that basically had an 8 pin PIC which connected to a potentiometer. This then drove a PGA2310/11. Try searching here. Thing is, a microcontroller is pretty much unavoidable.
edit: The kit i was thinking of was the Twisted Pear Kookaburra. Hardly simple, but it'll do the job
I belive there was someone on DIYAudio that had made a simple kit that basically had an 8 pin PIC which connected to a potentiometer. This then drove a PGA2310/11. Try searching here. Thing is, a microcontroller is pretty much unavoidable.
edit: The kit i was thinking of was the Twisted Pear Kookaburra. Hardly simple, but it'll do the job
You could probably do it with an FPGA. Lattice makes a few that have built in FLASH so the program self loads. They behave more like a CPLD. You may be abe to use a CPLD as well but the per gate cost on those tends to be much higher compared to FPGA's. Lattice aso has a free version of their software that you can use to develop the code. The programming cable, however, is not free. And the parts, through distribution, would also cost more than a small micro. And it is still a programming job. Instead of using C or assembler you would use Verilog, VHDL or ABEL.
So I am not sure if this is a cost effective solution, but it is a possible solution. In any case you would probably have similar expense and hurdles to deal with when using a micro. For a one off application the cost of the silicon itself is the least of your worries. BTW, I have no affiliation with Lattice. I just happen to think they are making some great CPLD's and some fairly innovative FPGA's these days. I've used these parts.
If you are a serious hobbyist, programmable logic opens up all kinds of other design doors for you. It wouldn't hurt to get your arms around this technology as a good learning exercise.
So I am not sure if this is a cost effective solution, but it is a possible solution. In any case you would probably have similar expense and hurdles to deal with when using a micro. For a one off application the cost of the silicon itself is the least of your worries. BTW, I have no affiliation with Lattice. I just happen to think they are making some great CPLD's and some fairly innovative FPGA's these days. I've used these parts.
If you are a serious hobbyist, programmable logic opens up all kinds of other design doors for you. It wouldn't hurt to get your arms around this technology as a good learning exercise.
BTW,
The TI (once Burr-Brown) 2310 was Burr-Brown's clone of the Cirrus 3310 but with higher analog voltages allowed. So if you are searching for ap notes on suitable control schemes, look for the CS3310 as well. The control I/F is identical. They are drop in replacements for each other.
The TI (once Burr-Brown) 2310 was Burr-Brown's clone of the Cirrus 3310 but with higher analog voltages allowed. So if you are searching for ap notes on suitable control schemes, look for the CS3310 as well. The control I/F is identical. They are drop in replacements for each other.
jaycee said:The amount of standard 7400 series logic you'd need to drive a PGA2310 makes it unfeasible. You;d have to have two 8 bit counters supporting increment and decrement, and some shift registers, and a clock.
I belive there was someone on DIYAudio that had made a simple kit that basically had an 8 pin PIC which connected to a potentiometer. This then drove a PGA2310/11. Try searching here. Thing is, a microcontroller is pretty much unavoidable.
edit: The kit i was thinking of was the Twisted Pear Kookaburra. Hardly simple, but it'll do the job
it is the twisted pear (www.twistedpearaudio.com)
kookaburra. you can buy just the programmed pic and PCB. it works very well i use it for my PC audio
The Elektor Magazine has published in April/May 2004 a preamp project based on the PGA2311 (same as PGA2310 but operates on a different voltage span).
If you don't want to mess with microcontroller and/or digital logic, you could simply order the pre-programmed microcontroller (The firmware is free if I remember correctly so a friend can do it for you too) from elektor and follow or adapt the circuit to your tastes. They even included support for a 2X16 character lcd display.
Elektor article :
http://www.elektor.com/Default.aspx?tabid=27&art=51734&PN=On
http://www.elektor.com/Default.aspx?tabid=27&art=51749&PN=On
Regards,
Emmanuel
If you don't want to mess with microcontroller and/or digital logic, you could simply order the pre-programmed microcontroller (The firmware is free if I remember correctly so a friend can do it for you too) from elektor and follow or adapt the circuit to your tastes. They even included support for a 2X16 character lcd display.
Elektor article :
http://www.elektor.com/Default.aspx?tabid=27&art=51734&PN=On
http://www.elektor.com/Default.aspx?tabid=27&art=51749&PN=On
Regards,
Emmanuel
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