[sdiy] Question about LEDs

[Seb Francis]

David G. Dixon wrote:
> This may seem like a dumb question, but when you have a module such as a
> simple LFO with a rate-indicating LED -- something like the MOTM-390, say --
> is the LED typically always blinking, even when nothing is plugged into the
> circuit, or is it typically deactivated somehow when the module is not being
> used?
>   

Are you thinking about switching transients by any chance?  Not a 
problem with the MOTM LFOs as the LED runs from the triangle wave.