Portable control measurement device
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Portable Control & Measurement Device. Yotam Vit Karinne Attali. Supervisor: Boaz Mizrachi ( Zoran ) ‏. The PCD:. Portable & user friendly Low-priced Versatile & multi-purposed Measure and display results instantly Store data for later re-evaluation Control over environment

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Portable Control & Measurement Device

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Portable control measurement device

Portable Control & Measurement Device

YotamVitKarinneAttali

Supervisor: Boaz Mizrachi (Zoran)‏


The pcd

The PCD:

  • Portable & user friendly

  • Low-priced

  • Versatile & multi-purposed

  • Measure and display results instantly

  • Store data for later re-evaluation

  • Control over environment

  • Customization and extension of feature-set in HW & SW


While waiting for the new board

While waiting for the new board…

  • Gather and process the materials

  • Self-learning process:

    • PCD: PIC, Data sheets, schematics, HW & SW

    • MPLab environment: ICD, debug & program

  • Design and preparation of ICD connector Cable

  • BOM & inventory management


The new board has arrived

!The new board has arrived

  • Assemble & HW debug

  • Focus on “power circuit”

  • Sensors debug and driver implementation

    • Accelerometer

    • Pressure

    • Buzzer

  • Multiple devices production


Power circuit

Power Circuit

  • Enables device “turn off” via “on/off switch”

    • SW open, EN=1.6V

    • SW closed, EN=2V

    • When “Pic” reads 2V it enforces logic ‘0’ on EN

    • DCDC 3.3V shuts down

    • No VCC to Pic->device turn off

if ((shutSum/(double)i)>1.6) {if (dcdcOnOff==0) MCU_POWER_CHRG_CE=0{;

Mcu_power_shutdown_detect

SW

Mcu_power_shutdown

EN


Accelerometer

Accelerometer

A micro-machined device measuring static acceleration.

Output voltage alternates according to 3 dimensional axis.


Pressure

Pressure

פישבך קומה 13

A silicon sensor measuring absolute pressure.

Output voltage can be convertered to

pressure by:

פישבך קומה 1


Buzzer

Buzzer

for (b=0;b<9000;b++){}

for (b=0;b<18000;b++){

if ((b%100)==0)

MCU_AUX_BUZZER = !MCU_AUX_BUZZER;

}

for (b=0;b<9000;b++){}

for (b=0;b<18000;b++){

if ((b%190)==0)

MCU_AUX_BUZZER = !MCU_AUX_BUZZER;

}

An electronic audio device working by alternating on and off the signal source given by the PIC, thus creating different frequencies which give a big array of sounds.


Multiple devices production

Multiple devices production

  • Common malfunctions:

    • Design mistakes

    • Assemble mistakes

    • Defective components

    • Short/open circuit

    • Borderline design

    • Unexpected high “Pic” resistant

    • Out of range “Pic” input voltages


Multiple devices production1

Multiple devices production

  • Locate malfunctions:

    • Visual check

    • Voltage measure using Scope

    • Comparison to proper boards

    • Confirmation with “Data Sheet”

    • Resistant measurement w/o component

    • Disconnect (“lifting”) components (“legs”)

    • SW


Status report

Debugged

Status Report

Not-debugged


Project b gantt

Project BGantt


Questions

Questions?


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