Team PacemakerProject ObjectivesDesign SummaryDesign Summary (cont.)Project DiagramPreliminary Graphical DisplaysPowerPoint PresentationSlide 8MSP430F1611 FeaturesProgramming the MicrocontrollerExample C Code “Blinking Lights”EKGAmplifier ImplementationSlide 14Slide 15FeaturesApplicationsSimple Circuit Testing for Optimal DesignBefore & After Adding AmplifierEKG SchematicPower & User InterfacePowerSlide 23Slide 24UISlide 26Updated Schedule & Division of LaborThank You!Team PacemakerApparatus for the Analysis of Heart SoundsElectronic Stethoscope / EKG DeviceLuke PhilipsRyan LaterzaMin Dong BianSarah MakhijaProject Objectives•Provide objective means of analyzing cardiac acoustics–Aid in diagnosis of heart murmurs•Amplified signal from stethoscope, EKG–Synchronized signals•Handheld device, portable memory, graphical displayDesign SummaryMedical DoctorSoundStethoscopeElectrocardiogram Action Potential11Reads11Amplfies11Listens11Records1* Conducts11 EmitHeartValveCardiac Muscle41 Has11 Has11TreatsCurrent Domain ModelDesign Summary (cont.)Medical DoctorSoundHardware DeviceSD CardAction Potential11Reads11Records11 Writes11Records1* Conducts11 EmitHeartValveCardiac Muscle41 Has11 Has11TreatsSoftware Utility11GeneratesThree Dimensional Plot11 AnalyzesFuture Domain ModelProject DiagramPreliminary Graphical Displays•Dr. Weinberger’s data files•No accompanied EKG dataEKG Triggering & Averaging10 sec. FFT of Filtered Stethoscope DataMixed Signal Microcontroller TI MSP430F1611MSP430F1611 Features•Program Memory Type Flash •Program Memory 48 kB•RAM 10 kB•I/O Pins 48 •ADC 12-bit SAR –8 Software Programmable Input Channels–200 ksps Maximum Conversion Rate•Integrated Peripherals DMA, 2 12-bit DAC•Interface 2 Hardware SPI or UART•Pin/Package 64LQFPProgramming the Microcontroller•MSPGCC –Free C Compiler TI MSP430 Family–Windows and Unix Compatible–Supports the MSP430F1611 MCU–Supports JTAG Interfacing•Interface Used to Download Code from the PC to the MCU via a Serial/Parallel/USB AdapterExample C Code“Blinking Lights”#include "hardware.h"void delay(unsigned int d) {int i;for (i = 0; i<d; i++) {nop();nop();}}int main(void) {int i;int o = 0;WDTCTL = WDTCTL_INIT; P1OUT = P1OUT_INIT; P2OUT = P2OUT_INIT; P1SEL = P1SEL_INIT; P2SEL = P2SEL_INIT; P1DIR = P1DIR_INIT; P2DIR = P2DIR_INIT; P1IES = P1IES_INIT; P2IES = P2IES_INIT;P1IE = P1IE_INIT;P2IE = P2IE_INIT;while (1) { //main loop, never ends..for (i=0; i<8; i++, o++) {P1OUT = (1<<i) | (0x80>>(o&7));delay(0x4fff);}}}EKGAmplifier Circuit DesignAmplifier Implementation1. LF155/LF156…./LF356 JFET input Operational AmplifiersApplications:•Precision High Speed Integrators•Fast D/A & A/D Converters•High Impedance Buffers•Wideband, low noise, low drift amplifiersAdvantages2. Single-Supply CMOS Operational AmplifiersOR…FeaturesApplicationsSimple Circuit Testing for Optimal DesignOPA 335 LF3563. Bypass Capacitors0.1 nF & 4.7 nFBefore & After Adding AmplifierEKG SchematicTitleSize Document Number RevDate: Sheet of<Doc> <RevCode>EKG schematicA1 1Wednesday, March 01, 2006Differential Amplifier INA321Right ElectrodeLeft ElectrodeDA C1<Value>3151611114-+U2AEL2360C-N3131211514-+U2BEL2360C-NR1100KR2100KR3RE SISTORR4RE SISTORR51MR61MR710KR81MR9800R10RE SISTORR11RES ISTORR122.2MR132.2MC101nFC24.7nFPower & User InterfacePower•Power Supply– “wall wart” interface•Supplies up to 9VDC/300mA–Regulated 5V/3.3V–Stand alone Battery Charger•AC12050615A-01 single cell charger–Numerous Adjustable Voltage RegulatorsPower•Battery–ED053455-2C•860mAh Polymer Lithium Ion Battery•High Energy Density•Low Cost•3.7V Nominal Working Voltage•Low Weight - 0.65oz (18.5g)•Excellent Temperature Performance•Self-Discharge: <8% (per month)Power•Intelligence–TI-TPS65011•Multi-Channel 1-cell Li-Ion Power Mgmt IC•2DC/DC, 2 LDOs, I2C interface TPS65011 Regulated Outputs(#) 4 Vin(Min/Max)(V) 2.5/6 Vout(Min/Max)(V) 2.5/3.3 Vout2 Adj(Min/Max)(V) 0.85/1.8 Iout3(A) 0.2 Iout4(A) 0.2 Vout3 Adj(Min/Max)(V) 0.9/6 Vout4 Adj(Min/Max)(V) 1.8/3UILCD, two stages:–Hantronix HDM08216L•8x2–Seiko Backlight Graphic LCDUI•Keypad•Low power Keypad Interface With the MSP430•interrupt driven•Low power if all keys are pressed and held simultaneously•No crystal required•Minimal external components•Suitable for MSP430Updated Schedule & Division of LaborMilestone 1 – Data sampling; Power device; EKG CircuitMilestone 2 – UI / Software IntegrationExpo – Device able to acquire and display dataThank