[challenge-bot] / bill-of-materials.rkt

#! /usr/bin/env racket
#lang racket

(module+ main
  (displayln total-cost))

;; the robot is made of a bunch of items, like a screw or a motor.

;; this is a description of items in general.
(struct item
  (;; each item has a natural language description what the part is.
   description

   ;; how many units of this item are on a single robot
   quantity

   ;; how much does a single unit of these items cost
   unit-cost

   ;; how many days will it take to get the item
   max-lead-days

   ;; how to obtain the item
   where-to-get

   ;; any special notes about the item
   note))

;; usually, the above code would be enough for describing a bunch of
;;  items.  unfortunately, the last argument, for the parameter 'note',
;;  must be supplied in the default item constructor created above.
;; this constructor below, called 'make-item', allows creating
;;  items without supplying the argument for the parameter 'note'.  if
;;  the 'note' argument is not supplied, it will be replaced by the
;;  empty string, "".
(define (make-item
         description quantity unit-cost max-lead-days where-to-get
         [note ""])
  (item description quantity unit-cost max-lead-days where-to-get note))

;; TODO: add deck
;; TODO: add actual cost for screws, nuts, and other estimated parts
;; TODO: add male-female jump wires for connecting sonar sensors
;; TODO: add 3d printer filament cost for wheel, sonar sensor holders,
;;       caster standoff
;; TODO: add ball caster
;; TODO: add 9v battery holder and 9v battery
;; TODO: checkout the following, if it's not a fraud, buy for next class
;;; (string-append
;;;  "http://www.ebay.com/itm/UNO-R3-Development-Board-MEGA328P-"
;;;  "ATMEGA16U2-For-Arduino-Compatible-USB-Cable/201090526898")
;;; only $9.99 for arduino uno r3 + usb!!
(define bill-of-materials
  (list
   ;; the construction of the first item is heavily commented.
   ;; the higher amount of commenting is intended to make it clear
   ;;  how the code works to new readers
   (make-item (string-append
               ;; this is the argument for the parameter 'description'.
               ;; it's a description of the orange wire.  this is for
               ;;  documentation.
               "solid core orange 22 awg wire, male-male jump wire."
               "  units in mm.  makes electrical connection between"
               " arduino and motor controller, used for backwards"
               " enabling.")

              ;; this is the argument for the parameter 'quantity'.
              ;; this is the number of millimeters of orange wire
              ;;  in a single robot kit.
              ;; there are 2 orange wires, one for each wire.
              ;; the 120 mm wire reaches to the far side of the
              ;;  motor controller
              (+ 120 90)

              ;; this is the argument for the parameter 'unit-cost'.
              ;; the cost on jameco is 7.95 for 100 feet.
              ;; this calculation converts from dollars per foot to
              ;;  dollars per millimeter.
              ;; there are 100 feet, 12 inches per foot, 2.54 cm / inch,
              ;;  and 10 mm / cm.
              ;; the product of all these numbers is the number of
              ;;  millimeters purchased with $7.95
              (/ 7.95 (* 100 12 2.54 10))

              ;; this is the argument for the parameter 'max-lead-days'.
              ;; since the part is at jameco, i can pick it up same day.
              1

              ;; this is the argument for the parameter 'where-to-get'.
              ;; it is a url where the part can be purchased.
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_2154871_-1"))

   (make-item (string-append
               "solid core blue 22 awg wire, male-male jump wire."
               "  units in mm.  connects motor controller and arduino,"
               " used for forwards enabling.")
              (+ 120 90)
              (/ 7.95 (* 100 12 25.4))
              1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_36768_-1"))
   (make-item (string-append
               "solid core white 22 awg wire, male-male jump wire."
               "  units in mm.  connects motor controller and arduino,"
               " used for speed signal.")
              (+ 120 90)
              ;; cost of 1 mm
              (/ 7.95 (* 100 12 25.4))
              1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_36881_-1")
              (string-append "unit cost goes down for large orders,"
                             " see page for specifics"))
   (make-item (string-append
               "solid core green 22 awg wire, male-male jump wire."
               "  units in mm.  connects motor to breadboard.")
              (* 2 175)
              (/ 7.95 (* 100 12 25.4))
              1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_36822_-1"))
   (make-item (string-append
               "solid core yellow 22 awg wire, male-male jump wire."
               "  units in mm.  connects motor to breadboard.")
              (* 2 175)
              (/ 7.95 (* 100 12 25.4))
              1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_36920_-1"))
   (make-item (string-append
               "solid core red 22 awg wire, male-male jump wire."
               "  units in mm.  connects power for all components.")
              (+ (* 2 30) 25 25)
              (/ 7.95 (* 100 12 25.4))
              1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_36856_-1"))
   (make-item (string-append
               "solid core black 22 awg wire, male-male jump wire."
               "  units in mm.  connects ground for all components.")
              (+ (* 30 2) (* 4 25) 25 55)
              (/ 7.95 (* 100 12 25.4))
              1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
               "_10001_10001_36792_-1"))
   (make-item "4xAA battery"
              4 (/ 17.99 100) 1
              "http://www.frys.com/product/6292850"
              "can get in store")
   (make-item "4xAA battery holder"
              1 2.25 1
              (string-append
               "http://shop.evilmadscientist.com/"
               "productsmenu/partsmenu/422")
              (string-append
               "can get in store.  unit cost goes down for large orders"
               ", see page for specifics."))
   (make-item "angle bracket, 1/2 inch sides with #6-32 threaded hole"
              4 0.75 1
              (string-append
               "http://shop.evilmadscientist.com/productsmenu/partsmenu"
               "/465-bracket")
              (string-append
               "can get in store.  unit cost goes down for large orders"
               ", see page for specifics."))
   (make-item "Arduino(tm) board"
              1 16.98 8
              (string-append
               "http://www.colorapples.com/2012-new-arduino-uno-r3-boar"
               "d-atmega328-with-usb-cable-p-89818.html#.U3Lz5nJKyzA")
              (string-append
               "comes with USB A to B cable.  unit cost goes down for"
               " large orders, see page for specifics."))
   (make-item "motor" 2 6 7 "https://solarbotics.com/product/gm3/")
   (make-item "transparent 400 point (half) BreadBoard"
              1 5.95 1
              (string-append
               "http://www.jameco.com/webapp/wcs/stores/servlet/"
               "Product_10001_10001_2123830_-1"))
   (make-item "jumper wire female/male" 1/5 6 2
              (string-append "http://www.nexuscyber.com/7-premium-40-"
                             "pin-male-to-female-jumper-wires"))
   (make-item "small squares of double sided tape"
              1/30 12 1
              (string-append
               "http://www.officedepot.com/a/products/495242/"
               "Scotch-Permanent-Double-Sided-Foam-Tape/"))
   ;; TODO: get actual cost of #4-40 phillips 1&1/4" screws
   (make-item "#4-40 Phillips 1 1/4 inch screws"
              3 .1 1
              "olander" "price is an estimate. can pick up in person")
   ;; TODO: get actual cost of #4-40 hex lock nuts
   (make-item "#4-40 hex lock nuts"
              6 .1 1
              "olander" "price is an estimate. can pick up in person")
   ;; TODO: get actual cost of #6-32 3/8" screws
   (make-item "#6-32 button hex head socket 3/8 inch"
              12 .1 1
              "olander" "price is an estimate. can pick up in person")
   (make-item "motor controller"
              1 (/ 5.2 5) 10
              "http://www.ebay.com/itm/like/180976411359?lpid=82")
   (make-item "sonar sensor hc-sr04"
              2 1.39 7
              "http://www.ebay.com/itm/161156018270")))

(define total-cost
  (apply + (for/list ([thing bill-of-materials])
             (* (item-quantity thing) (item-unit-cost thing)))))
Commit	Line	Data
845aa5f9	1	#! /usr/bin/env racket
	2	#lang racket
	3
	4	(module+ main
	5	(displayln total-cost))
	6
8de07f0f	7	;; the robot is made of a bunch of items, like a screw or a motor.
	8
	9	;; this is a description of items in general.
5e2e135e	10	(struct item
8de07f0f	11	(;; each item has a natural language description what the part is.
	12	description
	13
	14	;; how many units of this item are on a single robot
	15	quantity
	16
	17	;; how much does a single unit of these items cost
	18	unit-cost
	19
	20	;; how many days will it take to get the item
	21	max-lead-days
	22
	23	;; how to obtain the item
	24	where-to-get
	25
	26	;; any special notes about the item
	27	note))
	28
	29	;; usually, the above code would be enough for describing a bunch of
	30	;; items. unfortunately, the last argument, for the parameter 'note',
	31	;; must be supplied in the default item constructor created above.
	32	;; this constructor below, called 'make-item', allows creating
	33	;; items without supplying the argument for the parameter 'note'. if
	34	;; the 'note' argument is not supplied, it will be replaced by the
	35	;; empty string, "".
5e2e135e	36	(define (make-item
	37	description quantity unit-cost max-lead-days where-to-get
	38	[note ""])
	39	(item description quantity unit-cost max-lead-days where-to-get note))
8de07f0f	40
	41	;; TODO: add deck
	42	;; TODO: add actual cost for screws, nuts, and other estimated parts
	43	;; TODO: add male-female jump wires for connecting sonar sensors
	44	;; TODO: add 3d printer filament cost for wheel, sonar sensor holders,
	45	;; caster standoff
	46	;; TODO: add ball caster
	47	;; TODO: add 9v battery holder and 9v battery
	48	;; TODO: checkout the following, if it's not a fraud, buy for next class
	49	;;; (string-append
	50	;;; "http://www.ebay.com/itm/UNO-R3-Development-Board-MEGA328P-"
	51	;;; "ATMEGA16U2-For-Arduino-Compatible-USB-Cable/201090526898")
	52	;;; only $9.99 for arduino uno r3 + usb!!
845aa5f9	53	(define bill-of-materials
845aa5f9	54	(list
8de07f0f	55	;; the construction of the first item is heavily commented.
	56	;; the higher amount of commenting is intended to make it clear
	57	;; how the code works to new readers
	58	(make-item (string-append
	59	;; this is the argument for the parameter 'description'.
	60	;; it's a description of the orange wire. this is for
	61	;; documentation.
	62	"solid core orange 22 awg wire, male-male jump wire."
	63	" units in mm. makes electrical connection between"
	64	" arduino and motor controller, used for backwards"
	65	" enabling.")
	66
	67	;; this is the argument for the parameter 'quantity'.
	68	;; this is the number of millimeters of orange wire
	69	;; in a single robot kit.
	70	;; there are 2 orange wires, one for each wire.
	71	;; the 120 mm wire reaches to the far side of the
	72	;; motor controller
	73	(+ 120 90)
	74
	75	;; this is the argument for the parameter 'unit-cost'.
	76	;; the cost on jameco is 7.95 for 100 feet.
	77	;; this calculation converts from dollars per foot to
	78	;; dollars per millimeter.
	79	;; there are 100 feet, 12 inches per foot, 2.54 cm / inch,
	80	;; and 10 mm / cm.
	81	;; the product of all these numbers is the number of
	82	;; millimeters purchased with $7.95
	83	(/ 7.95 (* 100 12 2.54 10))
	84
	85	;; this is the argument for the parameter 'max-lead-days'.
	86	;; since the part is at jameco, i can pick it up same day.
	87	1
	88
	89	;; this is the argument for the parameter 'where-to-get'.
	90	;; it is a url where the part can be purchased.
	91	(string-append
	92	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
	93	"_10001_10001_2154871_-1"))
	94
	95	(make-item (string-append
	96	"solid core blue 22 awg wire, male-male jump wire."
	97	" units in mm. connects motor controller and arduino,"
	98	" used for forwards enabling.")
	99	(+ 120 90)
	100	(/ 7.95 (* 100 12 25.4))
	101	1
	102	(string-append
	103	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
	104	"_10001_10001_36768_-1"))
	105	(make-item (string-append
	106	"solid core white 22 awg wire, male-male jump wire."
	107	" units in mm. connects motor controller and arduino,"
	108	" used for speed signal.")
	109	(+ 120 90)
	110	;; cost of 1 mm
	111	(/ 7.95 (* 100 12 25.4))
	112	1
	113	(string-append
	114	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
	115	"_10001_10001_36881_-1")
	116	(string-append "unit cost goes down for large orders,"
	117	" see page for specifics"))
	118	(make-item (string-append
119	"solid core green 22 awg wire, male-male jump wire."
120	" units in mm. connects motor to breadboard.")
121	(* 2 175)
122	(/ 7.95 (* 100 12 25.4))
123	1
124	(string-append
125	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
126	"_10001_10001_36822_-1"))
127	(make-item (string-append
128	"solid core yellow 22 awg wire, male-male jump wire."
129	" units in mm. connects motor to breadboard.")
130	(* 2 175)
131	(/ 7.95 (* 100 12 25.4))
132	1
133	(string-append
134	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
135	"_10001_10001_36920_-1"))
136	(make-item (string-append
137	"solid core red 22 awg wire, male-male jump wire."
138	" units in mm. connects power for all components.")
139	(+ (* 2 30) 25 25)
140	(/ 7.95 (* 100 12 25.4))
141	1
142	(string-append
143	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
144	"_10001_10001_36856_-1"))
145	(make-item (string-append
146	"solid core black 22 awg wire, male-male jump wire."
147	" units in mm. connects ground for all components.")
148	(+ (* 30 2) (* 4 25) 25 55)
149	(/ 7.95 (* 100 12 25.4))
150	1
151	(string-append
152	"http://www.jameco.com/webapp/wcs/stores/servlet/Product"
153	"_10001_10001_36792_-1"))
154	(make-item "4xAA battery"
155	4 (/ 17.99 100) 1
156	"http://www.frys.com/product/6292850"
157	"can get in store")
158	(make-item "4xAA battery holder"
159	1 2.25 1
160	(string-append
161	"http://shop.evilmadscientist.com/"
162	"productsmenu/partsmenu/422")
163	(string-append
164	"can get in store. unit cost goes down for large orders"
165	", see page for specifics."))
166	(make-item "angle bracket, 1/2 inch sides with #6-32 threaded hole"
167	4 0.75 1
168	(string-append
169	"http://shop.evilmadscientist.com/productsmenu/partsmenu"
170	"/465-bracket")
171	(string-append
172	"can get in store. unit cost goes down for large orders"
173	", see page for specifics."))
5e2e135e	174	(make-item "Arduino(tm) board"
	175	1 16.98 8
	176	(string-append
8de07f0f	177	"http://www.colorapples.com/2012-new-arduino-uno-r3-boar"
	178	"d-atmega328-with-usb-cable-p-89818.html#.U3Lz5nJKyzA")
	179	(string-append
	180	"comes with USB A to B cable. unit cost goes down for"
	181	" large orders, see page for specifics."))
5e2e135e	182	(make-item "motor" 2 6 7 "https://solarbotics.com/product/gm3/")
	183	(make-item "transparent 400 point (half) BreadBoard"
	184	1 5.95 1
	185	(string-append
	186	"http://www.jameco.com/webapp/wcs/stores/servlet/"
	187	"Product_10001_10001_2123830_-1"))
	188	(make-item "jumper wire female/male" 1/5 6 2
8de07f0f	189	(string-append "http://www.nexuscyber.com/7-premium-40-"
8de07f0f	190	"pin-male-to-female-jumper-wires"))
5e2e135e	191	(make-item "small squares of double sided tape"
	192	1/30 12 1
	193	(string-append
8de07f0f	194	"http://www.officedepot.com/a/products/495242/"
8de07f0f	195	"Scotch-Permanent-Double-Sided-Foam-Tape/"))
5e2e135e	196	;; TODO: get actual cost of #4-40 phillips 1&1/4" screws
	197	(make-item "#4-40 Phillips 1 1/4 inch screws"
	198	3 .1 1
	199	"olander" "price is an estimate. can pick up in person")
	200	;; TODO: get actual cost of #4-40 hex lock nuts
	201	(make-item "#4-40 hex lock nuts"
	202	6 .1 1
	203	"olander" "price is an estimate. can pick up in person")
	204	;; TODO: get actual cost of #6-32 3/8" screws
	205	(make-item "#6-32 button hex head socket 3/8 inch"
	206	12 .1 1
	207	"olander" "price is an estimate. can pick up in person")
	208	(make-item "motor controller"
	209	1 (/ 5.2 5) 10
	210	"http://www.ebay.com/itm/like/180976411359?lpid=82")
	211	(make-item "sonar sensor hc-sr04"
	212	2 1.39 7
	213	"http://www.ebay.com/itm/161156018270")))
845aa5f9	214
	215	(define total-cost
	216	(apply + (for/list ([thing bill-of-materials])
	217	(* (item-quantity thing) (item-unit-cost thing)))))