Remote Controlled (RC) Volume Control Kits - Overview wanted

[tiefbassuebertr]

I am looking arround to RC volume control kits, at best include envelope (enclosure) and RC transmitter hand set unit (motor pot or dig. controlled). Please note: Not digital attenuator, but digital controlled attenuator.
On ebay there are a wide range of bidders without envelope and only partly solutions (either only RC transmitter/receiver unit or only volume control unit with SPI controlled pins), but I want to have a completly kit like Vellemann K8022.
At follow this no longer available Vellemann Kit and some other examples:

A: RC Motor Analog-Potis
1) Velleman K8022 PASSIV Preamp with remote control
K8022 Passiver Vorverstärker mit RF-Fernbedienung im Sly-electronic Shop Berlin
http://www.sly.de/bbilder/k8022.jpg
Fernsteuersender Handsender 2 Kanal VM130T - Lüdeke Elekronic Elektronikhandel
http_www_velleman.eu/distributor/products/view/?id=345984
associated RC transmitter:
http_www_velleman.eu/distributor/products/view/?id=374092
2) RCLL, Remote Controlled Line Level Volume Control
Audioplex RCLL-1 Remote Controlled Line Level VC
http://www.audioplex.com/RCLL1%20revised.pdf
3) MK161 - IR 2 Channel Remote Receiver Kit
MK161 - IR 2 Channel Remote Receiver Kit - Ramsey Electronics
4) MV-04 motorize remote volume control
DIYCLUB
5) Remote control audio kit
Dantimax - Remote control audio kits

B. Remote Controlled Switched Resistors by Relay
1) The remote control paratactic volume control
The remote control paratactic volume control
2) Audio Volume Relay Attenuator with IR Control
Audio Volume Relay Attenuator with IR Control
3) Remote volume control board, using relay - Halcro also use relay on their DA10 pre amp
DIYCLUB
4) VolControl, Volume/attenuator control board
Dantimax (elektronik) - Control_boards
5) TentLabs Volume control
Volume control
more kits:
DIYCLUB

C) Semiconductor switches (C-MOS series)
1) Remote Controlled Stepped Attenuator
Welborne Labs Remote Controlled Attenuator
2) RC-16 Remote Volume Control (looks like that one from Cyrus III and Cyrus IIIi / Cyrus 3i)
http://www.oxmoor.com/files/cut%20sh...ut%20sheet.pdf
RC-16 Remote Volume Control - Oxmoor Professional Audio Products

And here several IC solutions for volume control application:
Digital Potentiometer
Digital Potentiometers and Capacitors (ISL22317)
Digital Volume Control
Volume Control - Volume Controls (CS3318)
2-Channel 78 dB Audio Attenuator
LM1972 - Micro-Pot 2-Channel 78 dB Audio Attenuator with Mute
Stereo Audio Volume Control (PGA2310-2311-2320-4311)
Audio - Volume Control - PGA2310 - TI.com
Electronic Audio Attenuator dc controlled (MC3340)
http://www.datasheetcatalog.org/data...ola/MC3340.pdf
MAS9116 - Stereo Digital Volume Control
MAS9116 pdf, MAS9116 description, MAS9116 datasheets, MAS9116 view ::: ALLDATASHEET :::
Dual-Channel Digital Volume Control with CMOS switch 4066
http://www.electronicsforu.com/efyli...ualchannel.pdf
Digital controlled stereo audio processor TDA7313 (ST)
http://ampslab.com/PDF/tda7313.pdf
http://www.st.com/stonline/stappl/pr...X_DOC&latest=N
Maxim DS8102 - the new volume control chip
http://datasheets.maxim-ic.com/en/ds/DS1802.pdf
DS8102 Dual Delta-Sigma Modulator and Encoder - Overview
DIY: high end DAC and digital volume control | Flickr - Photo Sharing!
TDA7439 (Linn Kolektor) THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR (ST)
http://www.datasheetcatalog.org/data...onics/4291.pdf

In the attachement various CMOS solution schematics.

I want to have a good overview about completly kits like the no longer available Vellemann K8022.

Thank you for additional proposals.

(copyrighted images removed by moderators)

[Rudi_Ratlos]

Take a look at this one:

Preamplifier from Lineup & Fotios for fun

Fotios' homepage: http://www.eal.gr/MICROS.htm

Best regards - Rudi_Ratlos

[cOz]

Paul Hynes has one too. Infra Red Remote Control LDR Volume Control.

[linuxworks]

the lcduino system might be able to do what you want. its now shipping as DIY board sets (and some harder to find parts). you buy the rest of the parts and solder. no case - you do your own case.

The LCDuino-1 Display I/O Processor

it has a choice of vol control engines: PGA for solid state (which I guess you don't like; for whatever reason...) and also relay based (pure analog; but controlled digitally). there may also be other engine plugins later but these are the 2 we support today. there is also i/o switch functionality if you want it. ir uses IR for learning but also has a web back-end coming soon.

is open source code and perhaps one of the more advanced vol control systems out there (yes, I wrote the code, lol).

[tomtiger]

Hi,

I am currently looking for (more or less) the same, just I want to mimic a 12-24 stepped attenuator ladder type. If anyhow possible it should be controlled by up/down switches so I can use a volume button like in the ARC reference preamp.

after a lot of research I am down to these 3 solutions, the Lite Audio V3 (your link to DIY Club) that has the control buttons but is r-2r not ladder tape. DIY gene have it and they also have a nice preamp chassis: Hi End preamplifier Chassis case, Full Aluminum/MK12

This one: Ultimate Remote Volume Control/Selector System | Diy HiFi Supply
I like the LEDs, but it is based on the DS1666 and a bit expensive and has a rotary encoder to manually control the volume.

This I like best but they have not responded to my technical information requests: Parallel remote control potentiometer - $99.95 : hifidiy.net

It is ladder type but it seems to have only 12 steps and I do not know if it can be cascaded. Should be possible to solder a led to each relay to implement the same LED position indication like the DIYhifisupply device.

Maybe this could help you

regards Tom

[linuxworks]

I'm curious, have you look at the lcduino system? why do you insist on ladder? attenuation is attenuation - I don't get why you care how its done.

you can have 127 steps of half db with the delta1/lcduino system. it has the most advanced sofware out there (ob disc: I wrote it, lol). it is also extremely affordable (we went out of our way to use low cost components and not require SMD construction, so its easy to build).

finally, its all open source so you can take its current software base and change if it you need to (but it already does more than any other vol control out there.)

[tomtiger]

Hi,

Originally Posted by linuxworks

I'm curious, have you look at the lcduino system? why do you insist on ladder? attenuation is attenuation - I don't get why you care how its done.

I guess it is some kind of audiophile paranoia. Having soldered the resistors to some stepped attenuators, I know the ladder type is working perfectly for me.

you can have 127 steps of half db with the delta1/lcduino system. it has the most advanced sofware out there (ob disc: I wrote it, lol). it is also extremely affordable (we went out of our way to use low cost components and not require SMD construction, so its easy to build).

That is much more than I need. And - at least for me - it is too complex to understand how everything works. Troubleshooting in case of malfunction is hardly possible for me (however, given the price, it might be more clever to purchase a new one). You replaced the caps on your switch, I replaced the caps on my Supermicro dual Socket370 Board some years ago for the same reason. I like to be able to fix things myself.

finally, its all open source so you can take its current software base and change if it you need to (but it already does more than any other vol control out there.)

That is a real big advantage! I did not realise that before. I guess I should be able to build a replacement for the Delta1 to implement a 12 - 24gang ladder type attenuator. and eventually change the software according to make it work. It is still overkill, I know there are chips out there with a simple +/- interface (2 pins connect 1 to ground is +, connect 2 to ground is -) and around 30 output pins at 5V or 12V to drive relays (or LEDs or whatever). I had the resources for such a solution about 5 years ago but lost it.

I will report, maybe I will give the LCDuino a try.

Thanks for mentioning it again,

regards, Tom

[linuxworks]

Originally Posted by tomtiger

Hi,

I guess it is some kind of audiophile paranoia. Having soldered the resistors to some stepped attenuators, I know the ladder type is working perfectly for me.

the r-2r style has also worked very well for me, too I've built at least 10 of them and its just math, really. there's nothing to not work about it. we have a web calculator that does the R selection for you. you pick the # of relays you want (the # of steps) and also the step size (half db, full db, tenth db, whatever). you then buy the R's from that calculator and stuff the boards. oh, and you tell the firmware (via menus) what you built, how many bits and what the step-size is. I usually built 8 bits and half db steps so that gives me 127db of range. way more than you need; but the firmware also lets you set a lower and upper bound and tie those to the min/max of the volume pot (the control element; no audio passes thru it). if you want to use only -80 thru -7, say, you tell the system that (also via menus) and now your 'lock to lock' on the pot is the range you selected. very handy, I think (but again, I wrote it and so I'm highly biased..)

That is much more than I need. And - at least for me - it is too complex to understand how everything works. Troubleshooting in case of malfunction is hardly possible for me (however, given the price, it might be more clever to purchase a new one).

one of the goals of the lcduino/volumaster project was to make it as transparent as possible, so you could see thru into the system and change/fix what you need; now or later on. the code does a lot but just ask if you have any questions. we have a support forum for the lcduino series of controllers and plugins.

You replaced the caps on your switch, I replaced the caps on my Supermicro dual Socket370 Board some years ago for the same reason. I like to be able to fix things myself.

you will like the lcduino system, then. the hardware and software is all open. all fixable. the arduino that its based on is also fully open and fixable/patchable.

That is a real big advantage! I did not realise that before. I guess I should be able to build a replacement for the Delta1 to implement a 12 - 24gang ladder type attenuator. and eventually change the software according to make it work.

see The delta1 Relay-based R-2R Stereo Attenuator and click on 'resistor calc' on the left. if you want less bits, tell it! no big deal; just install less relays and less R's. jumper from where you left off to 'the other end' of the board (where the other i/o port is) and tell the software. my early builds were 7 relays and 1db steps. if you wanted to save more, go for 6 relays and 1db steps. your choice. you can always add the 'missing' relays and R's later and then just go into menu mode, change the # of bits and it will just plain work. all at runtime, no rebuilding of firmware needed.