MarkT:
Or a search engine?!
I'm going to go off topic for a second.
What good is a search engine if it just directs people to places to BUY a product? I understand they need revenue, as greedy as they are, but if I want "information" then the search engines are becoming more useless all the time.
On topic, I searched, but when I was reading the reply that included the BJT comment I also saw a transistor call out.
I was looking at a circuit that had three resistors. And then was told to add one tot he BJT. Well, it looked to me like there IS one on the NPN transistor so I was, and maybe still am, confused.