Wookie, Checked the LED's and swithcing them around gives the same outcome, only different colors. When L1 is the only LED in, it blinks just fine. But when L2 is added, L1 stays on and when it is its turn to blink, it indeed grows in intensity but only a bit. L2 blinks just fine. I think it might have something to do with this: (Whenever the output is low, a low-impedance path is provided between the discharge terminal (DISCH) and GND.) Thanks for the assistance!