*** Bill Of Materials ***

Submitted by airman00 on July 3, 2008 - 4:42pm.

 

Here is the final bill of materials. I divided it up into sections and included prices.

Please note  that this is what I paid , I will include some comments on items I feel could be purchased for cheaper. These prices are not final and a lot of them I am not exactly sure of what I paid since a lot were lying around my workshop for months and I don't remember the exact prices , only their relative ones.

 

I purchased all my parts from eBay ,Jameco, Home Depot , and AllElectronics.com  . I used parts that are very common to find so you shouldn't have trouble finding any of them.

 

Tools:

1. Drill

2. Electric Screwdriver

3. Soldering Iron with solder

4. Hot Glue Gun

5. Small flat head screwdriver

6. Scissors

7. Wire Stripper

8. Some sort of saw to cut the wood

9. Black Spray Paint Canister  - $5

10. Silver Spray Paint Canister - $5

 

 

 

Chassis:

  1. Two Wheelchair Motors   -  $100 on eBay
  2. One   14" x 21"  plywood 3/4" thick  -  $2 ( this depends on how big a piece of wood you buy and how much you cut)
  3. Four  machine screws ( this depends on what the wheelchair mounting holes accept) - $0.64
  4. Four  washers for the machine screws - $0.50
  5. One caster to support at least 150lbs - $5.40
  6. Two screws to mount your caster ( this also depends on what the caster mounting holes accept) - $0.32

Motor Control:

  1. Eight 30amps automotive relays (cheapest I found is here) - $19.20
  2. Four dual relay sockets (cheapest can be found here) - $12.00
  3. Two 12V 20AH batteries ( you could really just get one and that would suffice) - $60.00
  4. Phidgets 0/16/16 (I bought from TrossenRobotics.com , thoguh eBay sometimes has them) - $99.00
  5.  Some 22 ga. or thicker  black wire( get a 20ft roll and that will be enough for the whole project) -$3.00
  6. Some 22ga. or thicker red wire ( 20ft roll will suffice for the whole project as well)-$3.00
  7.  Different color of electrical tape ( yellow,black,red,white) - $2.69
  8. See through plastic cover - $2.00
  9. Six L brackets ( each angle is 3" and 2" thick) - $3.00
  10. Eight #8 x 1"  drywall screws - $0.16
  11. One 120V Light Switch w/ at least 14 ga. wires attached - $5.49

Lower Body:

1. Two 14.5" x 8" plywood 3/4" thick -$4.00

2. Two of 11.5" x 8" plywood 3/4" thick - $4.00

3. One of 14.5" x 13" Plexiglas 1/4" thick - $3.00

4. Seventeen #8 x 1"  drywall screws - $0.34

5. Three L brackets ( each angle is 3" and 2" thick) - $1.50

6. Six #8 x  1/2" thick plastic spacers - $0.12

 

Upper Body:

1. One 5.5" x 9" plywood 3/4" thick- $1.00

2. One 5" x 9" plywood 3/4" thick - $1.00

3. Two 10" x 21" plywood 3/4" thick  - $4.00

4. One 9" x 11.5" plywood 3/4" thick - $1.00

5. One 9" x 21" plywood 3/4" thick - $2.00

6. One 12VDC Automotive MiniFridge - $15.00 ( got lucky on eBay)

7. Six L brackets( each angle is 3" and 2" thick)-$3.00

8. Two #8-32  x 1/4"  machine screw with two nuts and washers- $0.50

9. Twenty two #8 x 1" drywall screws - $0.44

 

Robot's Head:

1. 12" diameter cake cover - $1.29

2. One 1.5" dia. PVC slip-joint nut - $0.75

3. One PVC  7" x 1.5" diameter $ 3.00

4. One webcam - $5.00 ( eBay is a wonderful place)

 

Robot Arms :

1. Robot Arm Grabber Toy - $10

2. Two 1.5" dia. PVC slip-joint nut - $1

3.One 2" length PVC coupling - $0.50

4. Two 1.5" dia.  PVC threaded pipe that is at least 4" long ( this can be cut into a straight piece) - $1

5. Two 17" x 1.5" dia. PVC pipe - $ 4.00

6. Five L brackets( each angle is 3" and 2" thick) - $2.75

7. Four #8 x 1.75" drywall screws - $0.08

8. Four small L brackets ( servocity has similar ones, but theres always eBay :P ) - $0.60
     9. One 6V NimH battery(I used that) or 6V battery pack(cheaper) - $11

10. HS-425BB servo( electronics were fried so I got it cheap) - $5

11. Rim of a 4" dia. Lego Wheel- $0.15

12. 1.5" dia. duct connector - $3.00

13. Motorized back wheels of toy R/C car - $1.00  ( eBay has a large selection of broken R/C cars whose motors still work)

14. Two skinny L brackets ( its like 3" long at each angle but only 1/2" wide) - $0.50

15. Eleven #8 - 1" drywall screws - $0.22

 

 

Plus the laptop of choice --- this can be anywhere from $100 - $3000 . I used an old one that was lying around

 

Also I want you all to know that around 50% of all the parts I had from beforehand in my workshop so it only costed me like 50% of the total price listed here. You too probably have a bunch of the above parts lying around your house or perhaps you have friends who would be willing to donate parts, just use your resources and you could make this thing much cheaper than it is now.

 

Total Bill:  $420.14    +   laptop of choice