Hi Jon

Thank you for your support.

It might be good that the stable brightness by slow LED current decision.

and it might be suitable for stable brightness at power-on that Vout rises after a brightness setup of LED.

I got it.

Best Regards

m…

Hi Rob,

For the blinking oscillator, I think you could do a couple of things:

     1.  Simple 555 timer.  There's lots of choice and info on the web for doing this.

     2.  A simple RC oscillator constructed from an op amp (ADCMP370 would be a good choice…

Hi Jacky,

The ADP5587 is not the best solution.  It's pulldown pins are only spec'd at 1mA.  And the pins are only rated to 4V (max).  This would be a problem if one of the LEDs was off--then the pin would be pulled up to almost 9V.

Instead, we…