Paso 1: Las partes del proyecto
Arduino UNO o similar ($29,95)
http://www.Sparkfun.com/products/11021
Motor servo - grande ($12,95)
http://www.Sparkfun.com/products/9064
TECLADO 4 X 4 (o similar) ($7,79)
http://www.eBay.com/ITM/Data-Keypad-4x4-Black-Black-Keys-4-4-Switch-Key-x-/270347954381?PT=UK_BOI_Electrical_Components_Supplies_ET&hash=item3ef1fe68cd#ht_2720wt_1037
Proto Board ($9,58)
http://www.Olimex.cl/product_info.php?Currency=USD&products_id=170&product__name=Proto_Board_Bread_board
Pack de cables de puente de Breadborad ($10,59)
http://www.Olimex.cl/product_info.php?cPath=21_138&products_id=872&product__name=Breadborad_jumper_wire_pack
4 resistencia de 910 ohm Una resistencia de 1k