Dan Sinha Water Jug - Electronics And Software

LumeoStasis® Electronics and Software

Block Diagram

1.5V AA Cell

POWER @ 1.5V

Hall effect sensor SQUARE WAVE @ f OF IMPELLER RPM

Voltage Booster POWER @ 15V

POWER @ 15V

Frequency to voltage converter

Reset switch (jug only)

ANALOGUE V

Power regulator

PIC #1

PIC #2

PIC #3

BINARY SIGNAL

POWER @ 5V

POWER @ 5V

BINARY SIGNAL

PWM

MOSFET driver

PWM

MOSFET driver PWM

MOSFET

MOSFET driver PWM

MOSFET AMPLIFIED PWM

G

PWM

MOSFET AMPLIFIED PWM

R LED

PWM

B

AMPLIFIED PWM

Schematic

Frequency to voltage converter

Voltage Booster

+1.5V

8.2uH choke

1MΩ

22uF

+15V

10Ω

100kΩ 22uF 0.047uF

0.1pF

4k7Ω 0.0047uF

0V

VANALOGUEOUT

350Ω

LT1372 45 8 2 6 71

1N4937

4.4pF

2kΩ

AD650 1 14 2 13 3 12 4 11 5 10 6 9 7 8

0V One PIC and one FET driver per channel of the LED with the PICs daisychaining

{

1 2 3 4 5 6 7

1

14 13 12 11 10 9 8

PIC microcontroller

TC427 1 8 2 7 3 6 4 5

LM7805

+5V

0.33uF

20kΩ

0.1uF 250kΩ 0.1uF

FIN Hall effect sensor

500Ω

560pF 2kΩ

500Ω

0V 330Ω

PIC 16F684

To PIC #2

+15V

1N4937

VANALOGUEOUT

Jug only: To decoder and LCD

Power regulator

+5V

STP16NF

10Ω

0V

Reset switch

MOSFET driver

RGB LED (1 channel)

} x3

Schematic From PIC #1

330Ω

PIC 16F684

To PIC #3

1 2 3 4 5 6 7

2

14 13 12 11 10 9 8

TC427 1 8 2 7 3 6 4 5

STP16NF

0V

From PIC #2

330Ω

PIC 16F684 1 2 3 4 5 6 7

3

14 13 12 11 10 9 8

PIC microcontrollers

+5V

TC427 1 8 2 7 3 6 4 5

+5V

STP16NF

0V MOSFET drivers

RGB LED

Software Plan Main routine

Calc subroutine

SLEEP MODE

CALCULATE AVERAGE VOLUME/TIME FOR ALL EVENTS IN THE PAST HOUR (CURRENT TIME - T < 1 HOUR). STORE VALUE = R

VOLUME PER EVENT = FREQUENCY X CONSTANT R = SUM FOR EVENTS IN PAST HOUR / 1 HOUR

IMPELLER MOVES? YES

SMOOTH CHANGE OF R TO OCCUR OVER ~3 SECONDS

NO

PWR ON

CONVERT VALUE OF R TO PULSE WIDTH MODULATION IN 3 CHANNELS: CHANNEL 1: ONBOARD PWM CHANNEL 2 & 3: DIGITAL O/P SINGLE PIN (SENT TO PIC #2 - VALUE CONTAINING CHANNEL 2 & 3

RESET TOTAL AND RATE TO ZERO

START COUNTER = COUNT CAP EXIT SUBROUTINE

IMPELLER MOVES? YES RESET COUNT

JUG CALCULATE TOTAL VOLUME (VT) SEND DIGITAL O/P SIGNAL TO LCD

NO COUNT = 300?

YES NO

NO STORE VALUES FOR FREQUENCY (F) AND TIME OF EVENT (T)

RUN ‘CALC’ SUBROUTINE

RESET PRESSED? YES

EVENT MEANS WHEN SOMEONE TAKES A SIP, GIVING AN INPUT TO THE PIC

RESET TOTAL TO ZERO