The RO-BOE-CLOCK (fusing educational play with cutting edge technology TheThe RO-BOE-CLOCKRO-BOE-CLOCK OBJECTIVE:OBJECTIVE: To teach children ages 4-7 how to tell time To demonstrate the differences between analog and digital data input To seamlessly integrate several sensory devices To create a product that introduces the microcontroller to a currently untapped market (children’s educational toys) TheThe ElementsElements ofof thethe RO-BOE-CLOCKRO-BOE-CLOCK DesignDesign The Basic Stamp interprets PBasic responds to user commands controls sensor functions The Hour Hand The Minute Hand The Robot controlled by encoder and photoresistors controlled by potentiometer functions by IR sensor digital input Analog input linked to both clock hands and BS2 SCHEMATICSCHEMATIC DIAGRAMSDIAGRAMS THETHE WIREDWIRED BREADBOARDBREADBOARD THETHE LEDLED DISPLAYDISPLAY TheThe EncoderEncoder Corresponds to the Hour hand Binary layout Photoresistors are aligned with segments When user moves Hour hand, binary signal is read into BS2 then converted to “time” in hours TheThe EncoderEncoder 8 Y X9 1 N ZY9 4M4 B A109 L4 C 10 J 10 O 4 D10 4 E10 I4 F10 6 G10 H10 4 J9 K9 L9 I L N9 9 3 M 9 S P 2 9 V O9 2 2 H Q9 W 2 R9 2 D8 T E8 9 F B X2 3 F8 9 P G Y 4 H 8 C9 2 E I 8 A 3 8 A 9 Z J8 8 2 D3 Z7 10 K8 5 B8 T2 A35 B3 C3 U2 10 L8 W7 J5 Q M8 R 4 N K 5 O8 5 8 E L P8 7 2 5 D7 S5 Z6 Y T5 F7 6 M5 G 7 A7 U5 H7 4 B7 I7 L6 C M J7 7 6 N6 O6 6 P6 Z5 A6 8 AA POORPOOR VIEWVIEW OFOF THETHE PHOTORESISTORSPHOTORESISTORS && BULBSBULBS TheThe PotentiometerPotentiometer Continuous variable resistor Corresponds to the Minute hand Independent of the Hour hand BS2 converts analog signal to digital TheThe PotentiometerPotentiometer onon itsits ShaftShaft HowHow thethe RO-BOE-CLOCKRO-BOE-CLOCK gamegame isis played:played: MODE 1: SET THE HANDS PRESS THE BUTTON READ THE LED DISPLAY HowHow thethe RO-BOE-CLOCKRO-BOE-CLOCK gamegame isis played:played: MODE 2: PRESS THE BUTTON READ THE LED DISPLAY SET THE HANDS PRESS THE BUTTON “HAPPY” OR “SAD” BUZZER SOUND HowHow thethe RO-BOE-CLOCKRO-BOE-CLOCK gamegame isis played:played: MODE 3: PRESS THE BUTTON READ THE LED DISPLAY SET THE HANDS PRESS THE BUTTON BOE-BOT MOVES FORWARD OR BACKWARD DesignDesign ConsiderationsConsiderations “Gray” area on encoder Photoresistor armature composition Limited IR sensitivity Encasement size ProductProduct MeritsMerits Interactive teaching tool Multi-faceted instruction Exposure to high-tech applications Eliminates computer screen Developmentally appropriate for children Can be inexpensively mass produced MarketingMarketing PlanPlan Partnership with Polytechnic University, Parallax, Inc. and the designers to patent Target market: “yuppie parents”, elementary school teachers Multiple modes of use: interchangeable boards, “loadable” programming Sample sales venues: The Sharper Image,FAO Schwartz, Parallax online EQUIPMENTEQUIPMENT LISTLIST COMPONENT WHY WE USED IT Board of Education (BOE) with Basic microcontroller & circuit board from Parallax, Inc. Stamp 2 Binary encoder (twelve regions, four for the photoresistors to "read" light into binary code levels) 4 photoresistors respond to the presence or absence of light 1 continuous potentiometer to adjust position of the minute hand 1 multiplexer to reduce the # of I/O pins needed to run the LED display 1 IR LED for two-way communication between the clock and the program 1 LED display to show the time in hours and minutes 1 on-off switch to control the light bulbs which power the photoresistors push buttons to switch from one game-playing mode to another several 10K ohm resistors to limit the current flowing from the power source to individual components 1 microfarad capacitor part of the R-C circuit that controls the calibration of the potentiometer 2 miniature light bulbs with holders to provide more direct light so photoresistors will be more sensitive 4 AA batteries with holder power source for the light bulbs standard parts for the parallax ro-bot these include 2 servo-motors, another BS2, IR sensors/emitters, etc wires of various lengths for making complete circuits between components 1 15-pin data port to transfer the P-basic program from the computer to the microcontroller 1 speaker to make a programmed "win" or "lose" sound 1 IR emitter for two-way communication between the clock and the program ACKNOWLEDGEMENTSACKNOWLEDGEMENTS Dr. Vikram Kapila and Polytechnic University Sang-Hoon (Nathan) Lee Yan Fang (Yvonne) Li Hong Wong Alex Betti (our unsung hero!) All of the Mechatronics graduate students Parallax, Inc. The National Science Foundation Each other and the rest of the inaugural SMART class!!.