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Old 24th September 2008, 04:57 PM   #1
bbp is offline bbp  China
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Join Date: Sep 2005
Default For Share: Remote Volume Control KIT

To make a remote volume control is only a dream of mine in 2 years before.But I made it today ^_^

As to traditional ALPS attenuators, I prefer R-2R type digital volume control,ont only for the convenience by remote control,but also the HI-END sound quality.
This volume controller has very low THD because firm resistors consist all the audio path,high quality relays,separated GND L & R, separated GND analog & digital and consideratly PCB routing.

Funtions:
4 sources selector, 64 step volume control , power up/down , mute on/off.
all these funtion can be remote by the remote handset

This KIT includs:
controller board based on P89S51,1602 LCD, main board build with DALE resistor and Panasonic TQ2 relay
remote handset,and all the connecting wire

Here is some pictures I took in the testment. It works great,and I just use common metal resistor,but it sounds better than the audio grade ALPS 27 attenuator!

I made 20 PCBs in total this time, so I want to share some of them on diyaudio. PAYPAL accepted
Drop me an email or PM if you interest in it, thank you all ^_^


best regards
Lu
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Old 24th September 2008, 05:06 PM   #2
bbp is offline bbp  China
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Default PIC add

This is the full view, volume / source select can be control by the two rotary encoders.
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Old 24th September 2008, 05:40 PM   #3
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Location: Glasgow, Scotland
Did you make any mention of price?
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Old 25th September 2008, 05:26 AM   #4
bbp is offline bbp  China
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Join Date: Sep 2005
Quote:
Originally posted by justblair
Did you make any mention of price?
Hi justblair,

Total cost is 60 USD including airmail registered and paypal fee,
A better universal remote handset will be update later.


regards
Lu
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Old 25th September 2008, 06:54 AM   #5
mgm31 is offline mgm31  France
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Join Date: Sep 2005
Location: Toulouse
I'm interested but could I have some more information :

-> Are there source select on remote control ? How many source select ?
-> How many steps are on volume control ? What is the resistance (100K ?) ? Is it constant resistance ?
-> What displays the lcd ?

......

Seems a good project !
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Old 25th September 2008, 08:04 AM   #6
bbp is offline bbp  China
diyAudio Member
 
Join Date: Sep 2005
Quote:
Originally posted by mgm31
I'm interested but could I have some more information :

-> Are there source select on remote control ? How many source select ?
-> How many steps are on volume control ? What is the resistance (100K ?) ? Is it constant resistance ?
-> What displays the lcd ?

......

Seems a good project !

Hi mgm31,

Sources select can be control by both the remote handset and rotary encoder. 4 sources selectable.
There are two rotary encoder in the KIT, one = source select (rotate)+power on(push) , the other one = volume(rotate) + mute(push) . For the funtion power on/off and mute on/off, two additional relays must be added.
Volume control is 64 step, but the resistance is not a constant value, I use 10K and 20K resistors as R and 2R.
LCD displays the position ( 1-64 ) of volume and the source selected.


regards
Lu
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Old 25th September 2008, 08:44 AM   #7
bbp is offline bbp  China
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Join Date: Sep 2005
Correction:

Only one additional RELAY is needed when you want to build the "POWER ON/OFF" ,
this relay should set far way from the main board, for the risk of high voltage.

In the mute mode, MCU controls relays to ' 0 0 0 0 0 0 '

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Old 25th September 2008, 09:15 AM   #8
r8833 is online now r8833  Canada
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Join Date: Nov 2004
Location: Moose Jaw, Sk
hi,

interested in kit , but new to electronics, will you make a instruction guide on how to complele kit


rich
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Old 25th September 2008, 01:56 PM   #9
traw is offline traw  United States
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Join Date: Sep 2005
interested as well... not completely clear if full kit, partial kit or board.
easiest if complete kit not need to source additional pieces, sign me up
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Old 25th September 2008, 10:12 PM   #10
hoka is offline hoka  Netherlands
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Join Date: Feb 2008
Looks good!

I'll have one!
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