OpenLoggageIgor Ramos3/6/2014

Why OpenLoggage

0Motivation:0 What happens to my luggage after check-in counter at

the airport?0 Hot? Cold? Dropped? Opened?

0Open = 0 open source hardware and software0 “crystal-clear”

0Loggage = 0 log + luggage

Disclaimer

0Rules & regulations0 Does FAA allows luggage monitors?

Features

0 In scope0 Temperature0 Light (see if luggage was opened)0 Shock/drop (accelerometer)0 Log microSDcard

0Out of scope0 GPS due to antenna

0On the fence0 Built-in li-ion charger0 Serial or USB interface

Requirements

0Battery operated: Low power0Physically Robust: single pcb board

0 Breadboard not acceptable

Step 1: block diagram

Power Management Tip 1

0Drop from 5v to 3.3v0Drop from 16Mhz to 8Mhz0Set uC into Sleep mode

Arduino Arduino Sleep OLGA w/ sleep0

5

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50 44.1

32

0.495

Arduino Current Draw Improvement

Current

More info

0 Blog posts in sept/oct 20130Calculating Arduino Uno power draw

http://gadgetmakersblog.com/arduino-power-consumption/

0Calculating Atmel328 power draw0http://gadgetmakersblog.com/power-consumption-arduin

os-atmega328-microcontroller/

Power Management Tip 2

0Switch Power to peripherals0 User microcontroller pin if <30-40mA0 User FET to if >30-40mA

Power Management <30mA

0uC pin to control power0Add jumper for multimeter 51uA

Power Management >30mA

0Add Fet to switch power0Remeber to make ALL lines inputs!!!

Idle current= 20mAActive current = 50-60mA

Low Price! $2 vs $6.50

0Fake USB to Serial IC (blog post)0 http://gadgetmakersblog.com/2/

Prototype #1

Next Steps

0Make smaller0uC from DIP to QFP0Fix bugs0Remove test points

Thank you!

0Twitter: @RamosIgorS

0Site: OpenLoggage.com0Site: GadgetMakersBlog.com