User Guide
Lynxmotion SSC-32U Servo Controller Board
Electronics Guide
PowerOptions
USB
When the board is connected to a computer via USB, the onboard USB to serial chip will be
powered and your computer will be able to detect it and install the drivers. The USB does not
however power the the main ATmega chip, so it must be powered separately through VS1 or
VL.
VL Screw Terminal
The VL screw terminals allow for unregulated inputs to the logic voltage (the voltage used by the
main processor / chip). The logic voltage is automatically selected between VL and VS1
(whichever has highest voltage). So long as VS1 is above 5.3V (not counting temporary drops
in voltage), it is sufficient to power the logic voltage, and you don’t need to connect anything to
the VL terminals.
● Ideal: Nothing connected
● Nominal: 6-12V
● Absolute: 5.3~16V
In most situations only one battery is needed (connected to VS1), though there may be
situations where it is preferable to have a battery for the logic and another for the servos:
● You are using 4.8V for your VS1, which isn't enough for VL.
● You want to cut the power to the motors but keep the logic powered.
● You want to ensure the logic is still powered even if the servo battery is depleted.
VS1 Screw Terminal
The VS1 terminal connects directly to the power and GND lines of servo pins 0 to 15. The
voltage applied to VS1 should ideally correspond to the nominal voltage of the servos. For most
R/C servos, this is 6V. Some “high voltage” R/C servos can operate using a 7.4V or 11.1V LiPo
battery, but unless this is clearly indicated in the servo’s specifications, be careful about what
voltage you use. Using a 7.4V LiPo with a normal R/C servo is discouraged and using 11.1V
with a normal servo will likely destroy it.
● Nominal: 6V (standard R/C servos)
● Absolute: 0~16V
VS2 Screw Terminal
The VS2 terminal is connected directly to the power and GND lines of servo pins 16 to 31.The
voltage applied to VS2 should ideally correspond to the nominal voltage of the servos. For most
R/C servos, this is 6V. Some “high voltage” R/C servos can operate using a 7.4V or 11.1V LiPo
battery, but unless this is clearly indicated, be careful about what voltage you use.
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