hi
-disclaimer: Whilst I might understand the concepts and even assemble simple circuits, my knowledge of electonics is pretty basic. I would like to apologise in advance for the lack of correct terminology, but any advice would be much appreciated.
----Although I have been working with myoware sensors for a while now, typically I would capture the data as a text file for further processing and application----
For a performance I'm currently working on I plan to use:
- MyoWare muscle sensor (Analog In)
- Arduino UNO board
- a single AC220-240V LED 6W(6x1W) filament bulb (forward voltage drop unknown)
The light has to be fairly substantial in size and power, therefore it would require an external power supply.. and with the bulb specifiation being 220-240V i don't see any alternative to it being connected to the mains.
(I've seen people talk about dimmable constant-current power supply - though I'm still in the dark as to whether it requires mains or it somehow magically boosts the 5V available from the Arduino board)
I have also read various threads on using actual dimmers and on/off relays, but can't see either of those working for my project..
In an ideal and simple world, constant current dimming principle could be applied to the output (the bulb) and it would work real-time as the arduino recieves the analog in signal from the sensor.
so bacically, light becomes brighter, when the muscle tension is high and dims, when muscles relax.
In reality - I'm not so sure it adds up. 
Any ideas on what to add(perhaps a 9.6Kohm resistor somewhere?) would be a great help.
And I would love to test them out before resorting to my haphazard approach that just might blow everything up in smoke.