555

This page is the central documentation site for the "Three Fives" and 555SE Discrete 555 Timer kits from Evil Mad Scientist.

Main details about the "Three Fives" kit

• Store page at Evil Mad Scientist
• Announcement articles for kit version 1.0 and for version 2.0 at Evil Mad Scientist Laboratories

Main details about the "555SE" kit

• Store page at Evil Mad Scientist
• Announcement article at Evil Mad Scientist Laboratories

Essential Documentation

• Kit Data Sheet (1.7 MB PDF)
• Three Fives kit Assembly Instructions (1.4 MB PDF)
• 555SE kit Assembly Instructions (3.3 MB PDF)
• 555 Principles of Operation (1 MB PDF). A detailed educational guide to the 555 kit, including theory of operation and questions to investigate.

Additional Resources

• Hundreds of 555 projects at Talking Electronics
• More information about the 555 at Wikipedia
• Tube Time, Web site of Eric Schlaepfer, designer of the Three Fives and 555SE circuit boards

Places for questions, answers, and sharing experiences

• Support forum at Evil Mad Scientist Laboratories
• Evil Mad Science Auxiliary Flickr Group where you can share photos of your giant 555's in action!