Arduino + motor controller.

A better way to do this is using an h-bridge IC. But can I buy one in Sydney? Only Altronics and Farnell stock them.

http://itp.nyu.edu/physcomp/Labs/DCMotorControl

http://lab.guilhermemartins.net/?p=66

http://www.toddholoubek.com/classes/pcomp/?page_id=394

There is an official Arduino motor controller shield. 

And the all done solution from Lady Ada – an Arduino shield kitset (with eagle files if you want to DIY) that controls dc motors, steppers and servos for good measure.

Lady Ada – 19.50USD + 9.65/33.50PP
http://www.ladyada.net/

Fun Gizmos (v3) – shield & components 25USD + 13.85/28.85/72.52PP
http://store.fungizmos.com/

Little Bird (v3) – shield only 18AUD +7.80PP (+GST I don’t like it when they neglect to mention that until checkout)
http://www.littlebirdelectronics.com/

NKC (v1) – shield only/shield & components 4.99/10.99USD (incl. shipping comes to 17-25USD)
http://www.nkcelectronics.com/

Schematics for Motor Shield v3
http://forums.fungizmos.com/

Local store w/ Arduino & motor controllers
http://www.oceancontrols.com.au/

Parts from Farnell ~36AUD

Parts list from Fun Gizmo (v3)

  • 1 Official Arduino bare motor shield PCB V3.0
  • 2 100uF electrolytic capacitor 25Vdc
  • 4 100nF capacitor polyester
  • 1 74HC32N DIL14 Quad 2-input OR gate
  • 1 SN754410 (L293D) DIL16 (motor controller)
  • 1 74HC00N DIL14 Quad 2-input NAND gate
  • 2 3mm RED LED
  • 1 3mm GREEN LED
  • 6 100K 1/4W resistor
  • 2 2.2K Resistor 1/4W
  • 2 470 Ohm Resistor 1/4W
  • 1 1×40 .1″ mail header
  • 2 Pushbutton 6×6Â