Peter and others -
Sorry for the delay in responding to your comments ... much appreciated. I have been doing my homework on "divider circuits", KVL and my understanding of transistors and just general circuit design ... Whew!!
I am attaching a test schematic with notes to see if I am on the right track. It is pretty simple, and only addresses the warning light and buzzer. I will work on the "bypass" capacitors next.
Thanks again for your input ... hopefully I can someday pass it forward as well.
Test NPN with buzzer.fzz (49.8 KB)