[sdiy] POLL: Blue LEDs on music hardware?

[Oren Leavitt]

On 1/24/2011 5:17 PM, Paul Perry wrote:
> If you have a common ground return for all leds - including panel
> backlights -
> then by PWM switching of the return you could vary the intensity of all
> lights
> simultaneously.
>
> paul perry Melbourne Australia
>
> ----- Original Message ----- From: "Mike Pepper"
>> on stage in dim light. Thought for the day, more stage instruments should
>> have panel dimmers.
>>


Quick! "Black out" the synths - enemy planes overhead!
...and put on the "air raid siren" patch!

Even just a simple linear dimmer (say a separate adjustable DC supply to 
open collector driven LEDs) might work in this case and spare you any 
PWM noise.

- Oren