Hey all, I posted this thread just under a year ago, but I never followed up with replies. But I've suddenly become interested in finishing it up. Because I want to power several LEDs (say 5 @ approx. 30mA), I'll use a hefty transistor for Q2 (say TIP31) and a relatively lightweight BC108 for Q1. It even seems that a 2N2222 will suffice for Q1. I simulated the circuit using LTSpice. And I fail to see a gradual increase in the Vr2 (base voltage), as SGT indicated in his reply. I still don't get how the cap is suppose to make Vr2 increase gradually. Mayb its because (assuming a fully discharged cap) initially the cap appears as a short and no current flows through R2, then as the cap becomes fully charged, its open circuit nature forces current through R2? I'm definitely at a loss here, as I dont see how to gradually increase (and decrease) the base voltage (Vr2) to provide a fading effect on the LEDs. Thank you.