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Building a Device Lab: Power
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Lara Hogan
June 20, 2014
Technology
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4.9k
Building a Device Lab: Power
Lara Hogan
June 20, 2014
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Transcript
Power
None
electricity 101
https://www.flickr.com/photos/marktee/9223003535 electricity = water
https://www.flickr.com/photos/marktee/9223003535 usb/power cables = garden hose
amps vs. volts
amperage
voltage
volts * amps = watts!
None
power considerations
how much power does each device draw, according to
the manufacturer's specs?
how much power can the surge protector support?
how much power can each usb hub support?
None
build to support your most power-hungry devices
power problems
power problems won’t accept a charge cycle on/off forever won’t
turn on blinking battery can’t hold a charge someone stole the battery
http://www.microsoft.com/surface/en-us/support/warranty-service-and-recovery/
troubleshooting
start simple
"When you see hoof prints, look for horses,
not zebras"
isolate the problem
DEVICE HARDWARE SOFTWARE
DEVICE HARDWARE cables charging port peripherals SOFTWARE battery display
DEVICE HARDWARE SOFTWARE apps operating system your base image cables
charging port peripherals battery display
why?
•devices drew too much power ! •devices weren’t getting enough
power ! •bad USB cables / peripherals ! •bad software ! •bad device
iterating on power
v1 - power strips
v2 - stupid USB hubs
v3 - better USB hubs
Cambrionix hub
Cambrionix hub • 32 ports • smart power delegation •
fault indicator • disables problem devices
v4 - better cabling/monitoring
energy consumption
None
None
pro power tips
http://iheartorganizing.blogspot.com/2012/03/you-asked-organizing-cords.html
have spares/duplicates as back-ups
have extra cables handy for people to steal