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.
4 sources selector,
64 step volume control ,no "POP" noise at all,
power up/down ,
all these funtion can be remote by the remote handset or manual
This KIT includs:
controller board based on P89S51,beautiful 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!
18 KITs available in total this time, so I want to share some of them on diyaudio and head-fi.
Total cost for one stereo KIT is only 60 USD, airmail registered included.
Drop me an email or PM if you interest in it, USER MANUAL is ready, thank you all ^_^