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more board 01 testing

More board assembly and testing and 01 is already a reject. Apparently TLE5602s are too slow for 30KHz PWM. The AVR and external SRAM work fine at 16MHz, though, which was the most worrisome aspect of this board. (Especially since this is basically SMT soldering practice for me.) I wanted to squeeze a few more cells into the battery pack anyway, which would put LMD18200s back on the table to replace the TLE5602s. Two more minor issues are the LM2678 /OFF incorrectly grounded (works if you just cut it) and the SRAM starting at address 0x0000, which means the first 4k are unusable.

The photo below shows the custom circuit board mounted, as well as the pan/tilt unit and CMUCam2+. The planned battery pack is installed between the two decks.

Whole

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This page contains a single entry from the blog posted on October 20, 2007 12:00 AM.

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