Original poster: "Mike Novak by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmnovak-at-msn-dot-com> > -Pin 3 is output to a pnp transistor (2N3906) via a 300 ohm resistor to keep > both the 555 and transistor happy. More specifically, to the base of the small transistor... Sorry -Mike