The SD21 is a 21 channel servo controller module, capable of driving up to 21 RC servo's.
Price: $66.00 (Incl. GST)
Number of Servo's - 21.
Refresh Rate - 20mS under all conditions.
Control interface - I2C.
Optional Controllers - Picaxe-18x, BS2p, Atom or BX-24 can be fitted
Position Control - Directly programmed in uS
Speed Control - From maximum down to 20 seconds for full rotation
Servo Power - separate terminals for voltage of your choice
Logic Power - separate terminals or from servo supply when 7.2v battery is used.
Expansion - 3 x I2C connectors.