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For Share: Remote Volume Control KIT

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B

bbp

Member
Joined 2005
orthoaudio.blogspot.com/
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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mgm31

Member
Joined 2005
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 !
 
B

bbp

Member
Joined 2005
orthoaudio.blogspot.com/
mgm31 said:
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 !
Click to expand...


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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