Case #83 William Played A Mean Game of Go Fish!Case #83 William Played A Mean Game of Go Fish!

Take down the house with this gadget. William's handheld controller provides the display of a monitored process deviation - but after hours it doubles as a card counter. (In either case, the algorithm is identical.) It works by adding or subtracting manually-entered "event" counts to a common 8-bit counter register. The value is subtracted from a predefined mean to generate the error or variation around the mean. This error "index" selects a display state sequence, continuously scheduled in an LED display. For William's complete instructions, click here.

For parts information, call (800) 433-5700, or go to www.alliedelec.com/gf.asp

For William Grill's complete instructions and microcontroller code to build a handheld card counter/process controller, click here.