XO 1.5 A2 Tinderbox
This describes the power testing setup for early prototypes of the XO-1.5 motherboard.
As part of the software development and device testing process for the XO laptops, they are connected to a testbed (the Tinderbox) for exhaustive power measurement while running different software suites. This includes a networked multi-channel high-precision voltmeter, used to measure current draws around the system.
We currently have an XO 1.5 A2 prototype wired up for testing.
This is the power distribution diagram for an XO 1.5 A2 prototype. It shows the different locations where we are measuring power consumptions (through current measurements). We also measure a couple of voltages (Vin and Vcore), as they vary over time and are needed to make power calculations.
A printable PDF version is also available.
A script is provided which reads the power consumption and offers a summary.
Some results are in http://dev.laptop.org/~wad/xo1.5pwr/.