In this post, two LED blinking circuits are given below. First one is dancing bi-color LEDs (two different color LEDs) where the two color LED will run in sequence. In the second circuit, we will ...

Here's the plan: I want to use one bi-color resistor for Power and HDD activity on my briefcase box. I want it to be, say, green when just the power is on, and flicker red when there's HDD activity.