(actual size = 3.0" x 3.6")

The figure at the right shows an XSCC20 Servo Control Computer. The board can control up to 20 servos (right-side headers). Pins not used for servos can be used for general digital I/O. There are also 8 separate channels which can be used for A/D conversions or digital I/O (left side). A 1-Amp 5v voltage regulator (upper-left) provides logic power, and can be used to drive external sensors, etc.

All headers are 0.100" spacing, have 3 rows of pins and are wired for compatibility with Futaba pinout servos (signal-power-gnd). The middle rows of headers are configurable for servo or +5v logic power, so for instance, the header lower-right could be used to connect and provide +5v power for external sensors, rather than servos.

Series resistors are used between the cpu chip and the external header for protection of the cpu, and all I/O pins have pulldown resistors.

Upper right-hand corner has space available for mounting a 5-Amp voltage regulator (and heat-sink) for powering a limited number of servos (up to 12 or so). Capacitors located there are used for servo power-buss noise filtering.

The prototyping area on the lefthand side of the pcb has been left open for customization, and can be used for digital I/O or A/D channels. There is space for custom circuitry, such as voltage dividers, filter capacitors, LEDs, etc.

Additional info about the pcb used by the XSCC20 can be found on the BOT40-II Controller Board page.

Physical. 3.0" x 3.6" (76 x 91 mm) - industrial-quality double-sided FR4 pcb with heavy power-buss traces, plated-through holes, solder masks and silk-screens.

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