On Mon, Sep 18, 2017 at 11:38 AM, Csaba Láng <langcsaba@gmail.com> wrote:
I have found this one:


I guess it does the job.


It will only switch things on and off, not dim them. For that you want something with triacs or scrs like this:
https://www.quasarelectronics.co.uk/Item/velleman-k8064-dc-controlled-dimmer-kit
or

https://www.bhphotovideo.com/c/buy/Projection-Accessories/ci/1675/N/4062040351


Martin
 
On Mon, Sep 18, 2017 at 5:06 PM, IOhannes m zmoelnig <zmoelnig@iem.at> wrote:
On 2017-09-18 17:00, Peter P. wrote:
>> you can buy/use/build usb to DMX interface, and a DMX dimmer.
> Sometimes there are even very basic dimmers that even take MIDI as
> control signal.

and there are "DMX interfaces" that present themselves as MIDI devices
(either they have MIDIin and DMXout; or they show up as MIDI devices
when connected via USB)

fgsd,f
IOhannes


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