The Puzzler Challenge A selection of brain twisters to test your ingenuity and challenge you to solve the missing link, beware they are not as easy as they look. Puzzler 5 (Catalog 101) Help sense the flooding quickly Puzzler 4 (Catalog 294) Help Bob Wheels find a durable rotation sensor. Solve the missing component! Puzzler 3 (Catalog 293) Big Bucks Bank needs your help to solve their power supply dilemma Puzzler 2 (Catalog 292) Discover the heart of the monochromatic light detector Puzzler 1 (Catalog 291) Give a quick pulse of power to a laser diode