diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Analog Line Level (http://www.diyaudio.com/forums/analog-line-level/)
-   -   Passive (active) preamplifier with selector (motorized ALPS, IR) (http://www.diyaudio.com/forums/analog-line-level/182600-passive-active-preamplifier-selector-motorized-alps-ir.html)

veteran 6th February 2011 10:24 AM

Passive (active) preamplifier with selector (motorized ALPS, IR)
 
I was thinking about input selector board for quite some time as a supplement to PVC (passive volume controller) project and finally I found some time to complete it.

Its a 4 input and 2 output selector. Im using two relays for each channel separate for signal and ground (second one can be replaced by jumper). There is also place for power supply that can be used to power the relays (for standalone selector or higher voltage relays).

I also redesigned my motorized ALPS potentiometer controller to work with this board this combination gave a complete passive preamp with volume control, selector and some additional features:
- PCB with backlighted buttons (4 inputs, 2 outputs, mute)
- ability to connect infrared remote control (that cal learn every RC5 remote commands)
- connector for ON / OFF (backlighted) button
- two additional channels capable to drive relays (one of them for ON/OFF relay)
- mute and monitor functions

As You can see potentiometer PCB was separated from the selector so I can connect any external preamplifier (such as Aleph 1.7, tube), buffer, etc.

http://www.unisonus.pl/pdf/selektor/DSC_6653.JPG
http://www.unisonus.pl/pdf/selektor/DSC_6656.JPG
http://www.unisonus.pl/pdf/selektor/DSC_6657.JPG

guik 14th February 2011 12:43 PM

Any news ? I'm very interested by such a preamp ;)

veteran 17th February 2011 07:16 PM

1 Attachment(s)
The project and software are ready - all components works fine. Now I'm looking for good enclosure ;) If there will be several people interested I can order more boards and maybe some components.

veteran 20th February 2011 07:26 PM

I also found some time to connect my selector with volume control based on relays ;)

http://www.unisonus.pl/images/selector/DSC_6870.jpg

Peng 23rd February 2011 02:51 PM

That looks really nice ! I'm interested.

veteran 26th February 2011 11:37 AM

I can order more boards for this project if anyone is interested. The cost of one set will be around $25 (gold plated). You also need a programmed microcontroller.

eclectic2k 27th February 2011 11:20 PM

Quote:

Originally Posted by veteran (Post 2483601)
I can order more boards for this project if anyone is interested. The cost of one set will be around $25 (gold plated). You also need a programmed microcontroller.

I'm interested in some boards. Also maybe interested in some of the relay based volume control boards if they exist. Hopefully shipping is not cost prohibitive to the US. Should be OK for just PCB's I think. Also, I can program the MCU myself if you can send the binary after the boards are available...

please do let me know if this happens...

Peng 28th February 2011 11:31 AM

Hi Veteran, do you see a possibility to include the programmed microcontroller ?

veteran 9th March 2011 11:11 AM

Yes. I can even create a full (maybe without potentiometer) set/kit of elements needed to build this selector. Let me know if you are interested in such group buy.

komigenie 10th March 2011 11:12 AM

Quote:

Originally Posted by veteran (Post 2497325)
Yes. I can even create a full (maybe without potentiometer) set/kit of elements needed to build this selector. Let me know if you are interested in such group buy.

I would like one of those .. count me in ..


All times are GMT. The time now is 09:30 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2