Lightspeed Attenuator

[Ali Tait]

Thank you for reply,
I sent an email to George and awaiting for his answer, but for my knowledge he lives in Australia, so shipment could be pricey... Anyway I will try to find out all costs,
The other guy's LDR is with remote which I don't need,
so my offer is still actual for UK based DIY'ers,
come on lads!

all the best

Sent you a PM.

[Paul Hynes]

Hi 24bit,

The voltage controlled current source (VCCS) module for LDR Volume control does not need the remote control modules to work. You can use push button controls on the front panel of the enclosure chosen to house the VCCS module. This will give you Volume Up, Volume Down, Balance adjust Left, Balance adjust Right. The balance function may be very helpful in your application. As far as I am aware this is not available on the Lightspeed, or the other simple DIY options shown on the Lightspeed DIY thread.

The modules are still available at the original DIY Audio group buy price, which just covers the costs of manufacture without any business profit.

Regards
Paul

[Marra]

I can't wait to try one of these; got the matched LDR's from Uriah. Just waiting on Farnell and the VCCS boards from Paul.
Aren't Farnell sometimes annoying; placed my order on Saturday the transformer arrived this morning everything else is being delivered by the Royal Mail; with this weather I might have to wait.

[24bit]

Hi 24bit,

The voltage controlled current source (VCCS) module for LDR Volume control does not need the remote control modules to work. You can use push button controls on the front panel of the enclosure chosen to house the VCCS module. This will give you Volume Up, Volume Down, Balance adjust Left, Balance adjust Right. The balance function may be very helpful in your application. As far as I am aware this is not available on the Lightspeed, or the other simple DIY options shown on the Lightspeed DIY thread.

The modules are still available at the original DIY Audio group buy price, which just covers the costs of manufacture without any business profit.

Regards
Paul

Hello Paul,

Kindly thank you for answer. I definitively need one with the KNOB to control volume ( I need to make a scale and mark dB SPL, for working purposes), so push buttons for Volume won't work for me. Anyway option to set up balance is interesting (question - is it for setting balance up ONCE a time or rather more often ?)

Regards

Filip

[Marco]

Hi Filip,

Welcome to AoS

Could you please pop into the Welcome area and introduce yourself to our community, by providing your basic location, system details and music tastes, as this is the required procedure for new members on AoS.

Cheers and enjoy!

Marco.

[Paul Hynes]

Hi Filip,

The VCCS module is not designed for use with a rotary control. On power down the DS1802 control chip will lose balance information and balance will have to be reset when power is re-applied.

Regards
Paul

[24bit]

Hi Filip,

The VCCS module is not designed for use with a rotary control. On power down the DS1802 control chip will lose balance information and balance will have to be reset when power is re-applied.

Regards
Paul

Thank you very much Paul. I understand, it would be quite a hassle to set up balance every time device is on/off, but possible, (just time consuming and not comfortable). Anyway lack of knob makes it not very good for my application.
Again, big thanks for chime in Paul

Regards

[24bit]

Hi Filip,

Welcome to AoS

Could you please pop into the Welcome area and introduce yourself to our community, by providing your basic location, system details and music tastes, as this is the required procedure for new members on AoS.

Cheers and enjoy!

Marco.

Hello MArco,

It's done

[Marra]

Finished assembling my optivol/lightspeed last night and plugged it into my system this morning; I now understand why people have been so enthusiastic about these things! Detailed ; dynamic with a big soundstage; all this even though my power amp has a lower than optimal input impedance. Thank you George for making the details of your design public knowledge.

[georgehifi]

Thank you George for making the details of your design public knowledge.

Glad you like it, and thank you for the pat on the back.

Cheers George