The Servo Smart Board (SB-1) drives up to 4 R/C servos. The board is compatible with Fubata servos that use the "J" type connector. It's probably possible to drive servos from other manufacturers but the wires may have to be rearranged on the connector.
For those who don't know, a servo is controlled via pulse width modulation (PWM). A continuous series of pulses is sent to the servo through its signal wire. The width of the pulse corresponds to the desired servo position. For Futaba servos, the pulses range between 500 and 2000 microseconds (us) . So a train of 1200us pulses will cause the servo to move near its center position.
When setting the servo position in a Servo Control Widget, you are actually setting the pulse width in microseconds. The S3003 servos have a range of about 300 to 2100. Anything outside of that range and the servo will run against it's stop and begin to overheat.
IMPORTANT: Don't use a position setting that causes the servo to vibrate. This is a sign that the position setting is outside the servo's normal operating range and will cause it to overheat. Left in this vibrating/overheating state long enough, the servo will short out and ruin your Servo Smart Board.
It would be nice if the servos where set by degrees that corresponded to an angle. But to keep the system as flexible as possible, it's required to work in pulse widths instead. But there is nothing stopping you from labeling a servo widget to its resultant angle. For example, a setting of 1200 may drive the servo 90 degrees in your application, so just change the label to "90".
