1. Technion-Israel Institute of Technology Electrical Engineering Department High Speed Digital Systems Laboratory Project subject: wireless biofeedback system Performed by: Yarovoy Boris 319445722 Krassowizki Alexander 313988859 Instructor: Sinyuk Konstantin

2. Project objective Building of Biofeedback system which collects data from a person and creates influence on it Building of Biofeedback system which collects data from a person and creates influence on it accordingly, minimizing user interface

3. PICMicrocontroller PC System description Temperature sensor Skin resistance circuit I2C A/D ControlPWM UART Influence

4. System components Digital temperature sensor of TI TMP100 Digital temperature sensor of TI TMP100 with I2C interface with I2C interface Skin resistance circuit (self built) Skin resistance circuit (self built) Microchip microcontroller PIC18f452 Microchip microcontroller PIC18f452 with I2C interface with I2C interface Sound and light sources Sound and light sources Computer Computer

5. System components PIC microcontroller PIC microcontroller PIC 5 I/O I/Oports PWM module UART module MSSP module MSSP used as I2C interface MPLAB2 module for debugging C-compiler Evaluation board with LED’s

6. Components description Temperature sensor Temperature sensor The TMP100 require no external components for operation except for pull-up resistors (10 kOhm) on SCL, SDA (I2C interface pins), although a 0.1uF bypass capacitor is recommended.

7. TMP 100 GND Vdd 1 2 3 4 5 6 To I2C controller SCL SDA ADD1 (Input) ADD0 (Input) 0.1uF. NOTE: SCL and SDA require pull-up resistors for I2C bus applications. Temperaturesensor

8. Connecting T sensor to PIC PIC I/O port C with I2C pins T sensor SDA SCL SDA: digital temperature data SCL: serial clock TMP100 resolution : 9-12 bits (up to 0.0625 C) with conversion rate 25-3 samples/s A/DTemperatureregister

9. Components description Skin Resistance Circuit Skin Resistance Circuit Current up to 15 uA flows through human’s fingers and voltage difference between fingers is measured Current up to 15 uA flows through human’s fingers and voltage difference between fingers is measured AC current is preferred for it reduces AC current is preferred for it reduces changes to human’s tissue changes to human’s tissue After voltage is measured it is amplified After voltage is measured it is amplified and transmitted to PIC and transmitted to PIC

10. Connecting resistance circuit to PIC PIC I/O port A with analog with analog input pins A/D I R V Generalcircuit Amp Measurement borders: 5 – 25 kOhm

11. Schedule Finish design of resistance circuit – 1.01.03 Finish design of resistance circuit – 1.01.03 Learning of PIC features – 1.01.03 Learning of PIC features – 1.01.03 Design of sound and light sources - 8.01.03 Design of sound and light sources - 8.01.03 Assembling of entire system – 22.01.03 Assembling of entire system – 22.01.03 Programming of PIC – 15.02.03 Programming of PIC – 15.02.03