An interesting appnote from Maxim, on building a rig to test the efficiency of power supplies:
Practical Data Acquisition using a Windows-based Power Meter
A neat rig all told, and shows of a few of Maxim’s cool parts, but it originally came to my attention when a former boss saw this line and felt the need to share:
"At 9600 baud, it takes more than one millisecond to transmit eight bits of data together with the start and stop bits. This is obvious in hindsight, but it can give the designer hours of undeserved enjoyment not only in wondering why data is not reaching the PC correctly, but also in illustrating the difference in operating speeds of the microprocessor and the RS-232 link."
The voice of experience rings loud and clear with that one.
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