Hello every one . This is my first post . I am going to try an make an 6-led chaser circuit .From what I have found so far is that I can use a 555 Ic with a 4017 Ic. My problem for now is that I went radio shack to get some parts .The 4017 they did not have in stock but could order an mail to me .He told me that the 4017 cross-refenced to a 556. does anyone know if they are the same ? I looked at the data for the 4017 an it has 16 pins but the 556 has only 14 I do not understand Thank you in advance for any help with this . Micron