Building a Device Lab: Power

Transcript

1. Power
3. electricity 101
4. https://www.flickr.com/photos/marktee/9223003535 electricity = water
5. https://www.flickr.com/photos/marktee/9223003535 usb/power cables = garden hose
6. amps vs. volts
7. amperage
8. voltage
9. volts * amps = watts!
11. power considerations
12. how much power does each device draw, 
 according to the manufacturer's specs?
13. how much power can the 
 surge protector
    support?
14. how much power can each usb hub support?
16. build to support
    your most
    power-hungry devices
17. power problems
18. 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
19. http://www.microsoft.com/surface/en-us/support/warranty-service-and-recovery/
20. troubleshooting
21. start simple
22. "When you see hoof prints,
    look for horses,
    not zebras"
23. isolate the problem
24. DEVICE HARDWARE SOFTWARE
25. DEVICE HARDWARE cables charging port peripherals SOFTWARE battery display
26. DEVICE HARDWARE SOFTWARE apps operating system your base image cables charging port peripherals battery display
27. why?
28. •devices drew too much power
    ! •devices weren’t getting enough power
    ! •bad USB cables / peripherals
    ! •bad software
    ! •bad device
29. iterating on power
30. v1 - power strips
31. v2 - stupid USB hubs
32. v3 - better USB hubs
33. Cambrionix hub
34. Cambrionix hub • 32 ports • smart power delegation • fault indicator • disables problem devices
35. v4 - better cabling/monitoring
36. energy consumption
38.   
40. pro power tips
41. http://iheartorganizing.blogspot.com/2012/03/you-asked-organizing-cords.html
42. have spares/duplicates
    as back-ups
43. have extra cables handy for people to steal