BOT40 FEATURES power jumper + voltage reg + heat sink . 4 bumper switch inputs + reset switch . piezo + ground buss EMI filter . . power input + charger input physically separate logic and motor ground busses reduce EMI 10 digital I/O, or + up to 8 A/D + proto area + serial EEPROM + I²C buss 8 digital I/O, or + up to 8 servos + up to 3 hi-current drivers + external servo power MAX232 chip + additional RS-232 headers 4 h-bridges + motor headers + external motor power + motor EMI filters . . . RS-232 connector . PIC micro . 4 LEDs .

Click for blow-up and specifics of bare pcb (53KB)

Physical dimensions: 3.9" x 3.0" (99 x 76 mm).

Configurability. The BOT40 is highly-configurable. The proto area, second MAX232 channel, LEDs, and high-current driver channels can be configured to best suit particular user applications.

BOT40 Controller Block Diagram

The High-Current Driver area of the BOT40 Controller Board is very versatile, and can accommodate both NPN and PNP bipolar transistors, as well as both n-channel and p-channel MOSFETs. Driver power can be supplied either from the +5v buss (jumper J10), or from an external source (jumper J11 to +S buss). The pcb contains 3 identical driver layouts. Heavy pcb traces can carry up to 5 Amp. The diagram on the right shows the different ways this area can be wired up.

The last circuit, the P-MOSFET pullup driver, is especially useful for switching on-off power to large external 5v loads.