OpenLoggage - open source data logging platform
-
Upload
igor-ramos -
Category
Devices & Hardware
-
view
42 -
download
0
description
Transcript of OpenLoggage - open source data logging platform
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
10
15
20
25
30
35
40
45
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