A decent branded factory made continuous rotation servo -far more reliable than modifying a casero servo. See also the FW90X2 wheel sets that will fit this servo via the fantástico holes.. We also sell a number of different kits including the same Annodised Aluminium Chassis. 2WD or 4WD using DC motors in Micro Servo Housing (this is called a FM90R) or using the FS90R micro servo. Please search ‘olimex’ for Arduino amd motor drive boards suitable for your Androide.
All servos/motors with a std horn/lever set OR wheel each
No load speed: 110RPM (4.8v) / 130RPM (6v)
no load:100mA (4.8v) / 120mA (6v) stall: 550mA (4.8v) / 650mA (6v)
Peak Stall Torque (4.8v): 1.3 kg/cm / 18.09 oz/in
Peak Stall Torque (6v): 1.5 kg/cm / 20.86 oz/in