PCAD Alpha Unit

Edward N Carlson

ENCarlson Enterprises LLC

edwardncarlson@gmail.com

www.linkedin.com/in/edwardncarlson/

Tao Jiang

Goal Technologies LLC

tjiang2000@gmail.com

http://www.linkedin.com/in/taojiang2000

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Objectives

• Verify Components Design

• Develop Control Logic

• Make BOM Decision

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PCAD Components

• Heating Unit, etc

Heating Unit Test Module

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PCAD Control Unit Overview

LabJack

TC1 TC2 TC3 TC4

Arduino Pro

MINI

Convection

Temperature

Vapor

Temperature

Mixture

Temperature Electronics

Temperature

Barometric Pressure

Sensor

Venturi Pressure

Primaery Air Inlet Airflow

Mixture Outlet Air Flow

BingoPC

USB

DAQFactory

Express

Android UI

End User UI

Evaluation

Test &

Measurement

5 V

VS

3.3 V

DAC0

I2C Bus

SDASCL

Infrared Temperature

Sensor

OLED Display

Heater

UART

Count Up

Count Down

INT0

INT1

LabJack U6

• A USB based measurement and control

unit configured with:

– A/D: 4 thermocopules, 2 airflow meters and 1

pressure transducer.

– Digital Input: Side Door Open/Close.

– Digital Output: control one relay tick to control

power relay for heating unit.

– D/A: provide 3.3 V voltage source for Arduino

Pro MINI.

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LabJack

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BingoPC

• Windows 7 64 bits Laptop

– DAQFactory Express: Data acquisition and

control software used for Alpha Unit Study.

– Android UI: PCAD Android App running on

Google Android Emulator for UI Evaluation.

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Arduino Pro MINI

• Micro-controller based on ATmega328

running at 8MHz/3.3V

• It controls:

– 0.96” OLED for display via UART (serial).

– I2C bus master for I2C sensors: barometric

pressure and Infrared temperature sensors.

– Tri-color LED via 3 PWM outputs

– Two Interrupts for Count Up/Down buttons.

– Will take over all works from LabJack in Beta. 9

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PCAD Alpha Control Unit

1. OLED Display

(picture, text, slide

show and movie, etc)

2. 3.3 V grid Powered by

DAC0 from LabJack (blue

jumper wire)

10. 5V grid powered by

VS from LabJack (red

jumper wire)

3. Count Up button

(Go to next slide)

4. Count Down button

(Go to Prev slide)

9. Barometric

Pressure Sensor

(I2C)

5. Infrared

Temperature

Sensor (I2C)

8. I2C bus

connector

6. Button to Reset

OLED Display

7. Arduino Pro MINI

Micro-Controller

Battery Charger Board

3.7 V 1000mA Battery

11. Relay Tick to

Control Heater

Breadboard Description

• LabJack U6: Right side in Red Color and middle

row CB37 terminal board in Green.

• Battery and Charger: small breadboard at the

top row small breadboard.

• Arduino Breadboard: large breadboard at the

bottom row.

– Top part power grid runs 5V from VS of Labjack.

– Lower part power grid runs 3.3 V from DAC0.

– DO NOT short two power grids together.

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Alpha Unit

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Shop Vacuum for Suction

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Operations and Objectives

• There are three different operations. Each of them can

run as standalone.

– Alpha Unit Study: Control mechanism and control parameters.

– Android UI Evaluation: End user interface evaluation. UI only

without underneath logic.

– Arduino Board Evaluation to choose right components:

• Micro-controller: enough I/O support, expandability, capable of

running standalone.

• Sensors: size, responsiveness, expandability, etc.

• Display: size, cost, text, graphic, picture and easy programming.

• Development Tool Support: In favor of Open Sourced Tools for

lower development cost.

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Alpha Unit Study Steps

• Power up Bingo PC

• Connect USB cable to LabJack

• Double click Red DAQFactory Express

icon on desktop to start the program.

• Inside DAQFactory Express, “File”

“Open” and choose file

“c:\BingoProject\PCADDAQ.ctl”

• Go to “Page_0” or “Page_1” to open

control pages. 15

Temperature, Air Flow, Pressure Page

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Control Logic Page

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Android UI Evaluation

• Power up Bingo PC

• Double click P-CAD2.2 icon on the

desktop

• Wait about 3 minute until Emulator start

• Press “Menu” button on Keyboard Panel

• P-CAD shows on Home Screen

• Click on P-CAD icon to launch the App

• Press each tab at bottom to switch screen

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Android UI Screens

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Android UI Screens (cont)

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Android UI Screens (cont)

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Arduino Board Evaluation

Arduino Pro MINI

• Designed to leave a board embedded in a project

• CPU: ATMega 328 8M HZ/3.3 V

• 14 digital pin and 6 analog pin

• 6 PWM, 2 interrupt lines

• Communication: I2C, UART, SPI

• Size: 0.7" x 1.3 “

• Development Support: Open-source hardware/software

µOLED-96-G1(SGC)

• Low-cost OLED display graphics user interface solution

• 96 x 64 resolution, 65K true to life colours,

• 0.96” diagonal size, 32.7 x 23 x 4.9mm.

• No back lighting with near 180° viewing angle.

• Comprehensive set of built in high level graphics

functions and algorithms that can draw lines, circles, text,

and much more.

• Display full color images, animations, icons and video

clips.

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Sensors Under Evaluation

BMP085 Barometric Pressure Sensor

• I2C digital sensor

• Wide barometric pressure range

• Includes temperature measurement

Infrared Thermometer - MLX90614

• SMBus (I2C) digital sensor

• Internal 17 bits ADC

• Wide temperature ranges: -40 to 85°C for the ambient

temperature and -70 to 382.2°C for the object

temperature

I2C is a serial bus which allows connecting up to 255

sensors.

More sensors will be brought down and controlled by

Arduino board in Beta Design.

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Arduino Board Operation

• Power up Bingo PC

• Connect USB cable to LabJack U6

• Arduino board is powered by Labjack U6

• The OLED should show picture in Compound Gallery

• Barometric Pressure and Temperature Reading should

show on the OLED

• Press Count Up/Down button to go Next/Prev picture.

• Press OLED Reset button to let OLED to screen saver

mode to avoid burn-in effect

• Press Reset button on Arduino Pro MINI board to restart

the board and OLED will show Compound Gallery again.

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