© 2013 Designer Systems
Page 1 of 8
CNTRL15.03.13 Revision 1.01
Designer
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PRODUCT DESIGN AND MANUFACTURING
18 Channel Servo Driver Shield
for Arduino
™
and Raspberry-PI
™
Technical Data
Features
Arduino
TM
UNO Shield
standard form factor for
simple integration into any
Arduino project
Frees up the Arduino
TM
IO
lines normally used for servo
control
I
2
C interface for simple con-
nection to Arduino or Rasp-
berry-PI
Dual on-board 5Volt 3Amp
regulators, with heatsinking,
for servo power with enable
jumpers
Sixteen (16) level speed con-
trol for each servo
Movement complete and
soft-start complete status for
each servo
Global activation control
ensures all servos start mov-
ing together, important for
multi-legged robots
I
2
C address links allow up to
four [4] shields to be used
together to provide up to 72
servos
LVD, RoHS and WEEE
compliant product
Description
The Designer Systems DS-
SCX18.S is an eighteen [18] chan-
nel RC servo driver with advanced
servo control features.
Specifically targeted at the Ar-
duino UNO board user [all other
Arduino boards supported] and the
Raspberry-PI the SCX18.S fea-
tures high speed I
2
C communica-
tion for easy project integration
and smooth speed control.
Once connected each servo can be
positioned (with speed control),
enabled, reversed and soft-started
by simply writing a value to an
internal register over the connect-
ed I
2
C interface.
The SCX18.S caters for the major-
ity of servos by providing a wide
pulse width range of 0.50mS to
2.50mS with 8uS per step accura-
cy and also provides global activa-
tion of new servo position, soft-
start & movement complete regis-
ters for superior control.
The SCX18.S provides dual high
power regulators capable of sup-
plying 5V @ 3A to the connected
servos from an external Li-Pol or
Ni-MH battery pack of 7.2 to 8.4V
and features a disable link to allow
the use of low voltage battery
packs of 3.6 to 4.8V.
The on-board I
2
C pull-ups are
jumper configurable to allow dis-
connection when connecting to the
Raspberry-PI, which has its own
pull-ups.
Applications
The SCX18.S has applications
in robotics, including quadru-
ped, hexapod and octopod ro-
bots, process control & sensor
manipulation when used in con-
junction with standard RC ser-
vos.
Selection Guide
Description
Part Number
18 Channel Servo Driver Shield
DS-SCX18.S
HS311 Standard hobby servo
DS-HS311
Raspberry-PI, Arduino, NANO, UNO & MEGA are trademark.
DS-SCX18.S
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