On 19 Dec 2017, at 3:37 PM, Michael Balzer <dexter@expeedo.de> wrote:

Greg,

the blue LED is not controllable, it's acting as a Zener diode in the voltage regulation, i.e. it flashes when draining a too high voltage.

So, as a workaround you could replace it by a standard Zener diode, just needs to have the same breakdown voltage.

But I don't think the black case lets through much light -- Mark?

Regards,
Michael


Am 19.12.2017 um 05:47 schrieb Greg D.:

Hi folks,

The "real" module's case is black, but how well does it block light?

I'm thinking about the modem's LED, which flashes pretty brightly in the
proto (white) case.  In a dark parking lot, it could attract unwanted
attention.  (Or, perhaps simulate a car alarm, which wouldn't
necessarily be bad...)

If the LED is visible externally, is there a way to disable it?

Greg



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