Building a Device Lab: Power

Transcript

1. Power

2. None

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!

10. None

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?

15. None

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

37. None

38.   

39. None

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