Device for the Device for the Presentation of Presentation of

Olfactory Stimuli to Olfactory Stimuli to MonkeysMonkeys

Team MembersTeam MembersKevin Campbell (BWIG)Kevin Campbell (BWIG)

Sarah Kolpin (Communications)Sarah Kolpin (Communications)

Wyatt Potter (Team Leader)Wyatt Potter (Team Leader)

Heather Shaner (BSAC)Heather Shaner (BSAC)

Problem StatementProblem Statement

Build a device for use in Build a device for use in research that compares the research that compares the ability of young and old ability of young and old monkeys to sense tastes and monkeys to sense tastes and smells (stimuli). smells (stimuli).

Design ObjectivesDesign Objectives

• Flexible stimulus capabilityFlexible stimulus capability

• Present two different stimuliPresent two different stimuli

• Monkey makes a choice that must be Monkey makes a choice that must be finalfinal

• SensitivitySensitivity

Design ObjectivesDesign Objectives

•Provide a rewardProvide a reward

•Readily movable between cagesReadily movable between cages

•Durable, non-corrosiveDurable, non-corrosive

•Simple operation - as automated as Simple operation - as automated as possiblepossible

Original Mechanical Original Mechanical ModelModel

•Constructed a mechanical Constructed a mechanical prototype prototype – Gravity operated locksGravity operated locks– DurableDurable– ProblemsProblems

•Doors opened sidewaysDoors opened sideways

•Cumbersome to reset and moving partsCumbersome to reset and moving parts

– CorrectionsCorrections•Main change - hinge on top of doorMain change - hinge on top of door

•Minor changes- rounding lip and internal Minor changes- rounding lip and internal dividerdivider

Mechanical ModelMechanical Model

Mechanical Model Mechanical Model (locked (locked

tripped)tripped)

Electrical ModelElectrical Model•Compatible with the Mechanical ShellCompatible with the Mechanical Shell•Door hinges on top instead of sideDoor hinges on top instead of side•Automatic locking mechanismAutomatic locking mechanism

– Integral component is flip/flop circuitryIntegral component is flip/flop circuitry– Photodiode emitter and sensor pair on Photodiode emitter and sensor pair on

each dooreach door– Solenoid locking mechanism positioned Solenoid locking mechanism positioned

below door lipbelow door lip– Battery powered – 9 voltBattery powered – 9 volt

Electrical ModelElectrical Model•SimpleSimple

– Easy reset buttonEasy reset button– On/Off switchOn/Off switch

•ProblemsProblems– Data must be recorded manuallyData must be recorded manually– Client wants more functions Client wants more functions

availableavailable

Electrical Circuit SchematicElectrical Circuit Schematic

Possible Possible ImprovementsImprovements•Design automated fluid feeder systemDesign automated fluid feeder system•Design automated reward systemDesign automated reward system•Design microcomputer controlDesign microcomputer control

– Provides many unique options for deviceProvides many unique options for device– Take the place of the flip/flop circuitryTake the place of the flip/flop circuitry

•Design and add accessories to DeviceDesign and add accessories to Device– LEDs on front panel etcLEDs on front panel etc

Current FocusCurrent Focus•MicrocontrollerMicrocontroller

– Can have workable model by end Can have workable model by end of semesterof semester

– Flip/flop circuitry replaced by Flip/flop circuitry replaced by MicrocontrollerMicrocontroller

– Can be integrated with current Can be integrated with current electrical setupelectrical setup

– Can manage a variety of functionsCan manage a variety of functions

MicrocomputerMicrocomputer

ModelModel• One step higher than flip/flopOne step higher than flip/flop

• Manages various aspects of Manages various aspects of experimentexperiment

• Very versatile functions Very versatile functions

• Uses P-BASIC programs written on a Uses P-BASIC programs written on a PCPC

• Completely free running and portable Completely free running and portable once program files are transferred on once program files are transferred on

Microcomputer SchematicMicrocomputer Schematic

Preliminary DesignPreliminary Design• LED Display LED Display

– P11 & P12P11 & P12– Indicator lightsIndicator lights

• Liquid Crystal Display (Output)Liquid Crystal Display (Output)– P13P13– Two lines of textTwo lines of text

• Detector of Door Status (Input)Detector of Door Status (Input)– P6 & P7P6 & P7– Sends signal to output for resulting Sends signal to output for resulting

actionaction

Preliminary DesignPreliminary Design• Solenoid Door Lock (Output)Solenoid Door Lock (Output)

– P8 & P9P8 & P9– Lock door as in electrical modelLock door as in electrical model

• Control Push Buttons (Input)Control Push Buttons (Input)– P0, P1, P2, & P3P0, P1, P2, & P3– Standby, Start, Menu, SelectStandby, Start, Menu, Select

• Currently Unassigned Currently Unassigned – P4, P5, P10, P14, P15P4, P5, P10, P14, P15– Could be implemented for future useCould be implemented for future use– Can be input or outputCan be input or output

Variety of Functions Variety of Functions PerformedPerformed

• Setting the stimulus sequenceSetting the stimulus sequence

• Standby mode with dual lockoutStandby mode with dual lockout

• Control stimulus presentationControl stimulus presentation

• Record reaction time, response data, Record reaction time, response data, errorserrors

• Display status/ data messages on LCD Display status/ data messages on LCD panelpanel

• Transfer experimental results to database Transfer experimental results to database via PC RS-232 Serial Portvia PC RS-232 Serial Port

• Menu that can control indicator lights, anti-Menu that can control indicator lights, anti-jitter, door lockout, automatic reset etcjitter, door lockout, automatic reset etc

Microcontroller PartsMicrocontroller Parts

Parallax BS2-IC PC RS-232 Serial Port

Cabel

Basic Stamp Manual Pictures from

www.parallax.com

Carrier Board

2 X 16 Serial DisplayLED

Future PossibilitiesFuture Possibilities

•Microcontroller could make Microcontroller could make possible the integration ofpossible the integration of– automated fluid feed delivery automated fluid feed delivery

system of the stimulus along withsystem of the stimulus along with– Automated reward systemAutomated reward system– Data collection and display of Data collection and display of

results of Deviceresults of Device

AcknowledgementsAcknowledgements

Special Thanks to:Special Thanks to:•Thomas Roberts Thomas Roberts

– for assistance in prototype design for assistance in prototype design and developmentand development

•Clients: Clients: – Goran Hellekant, Vicktoria DanilovaGoran Hellekant, Vicktoria Danilova

•Advisor: Advisor: – Professor John WebsterProfessor John Webster