By Ian Prester

Coat hangers and
Wooden Posts 2
CPU
Pieces
1
CPU
Slot s
3
Memory
Slots
Memory
Pieces
Wooden
Dowels
And Cups

• 1: The first area is called transistor fabrication.
– This is the multicolored wooden dowels and the cups in which they are to be placed
• 2: The second area is called IC (integrated circuit) fabrication.
– This is the rack of multicolored coat hangers and the wooden posts with PVC pipes on which they are to be hung
• 3: The third area is called the CPU (Central
Processing Unit) fabrication area.
– This is the table in the middle of the playing field that has slots for the foam pieces on the floor to be placed in.

• In short the objective for the game is to build the best CPU (foam puzzle pieces in stage 3) possible.
• In order to build the CPU
1. Gates (dowels from stage 1)must be built
2. Integrated circuits (coat hangers from stage 2) must be built
3. IC’s (foam pieces) are used in stage 3 to make the best CPU
• The scoring software will keep track of how many gates and IC’s and CPU’s have been made for each team during the entire competition
• No gates and no IC’s means no CPU

Gate Fabrication (Dowels)
• This stage of the competition requires teams to take the wooden dowels
(transistors) on the bottom rack and place them into the bins above
• Different bins account for different points
• Lower bins are worth half the points upper bins are
• White ends out mean half the points of red ends out
• NAND bins (the ones facing the other way are the same as far as points and gates as the upper bins

Transistor values for AND , OR and NOT gates
48 transistors
96 transistors
Non-painted end
Painted end
Upper Assembly Line
Lower Assembly Line
24 transistors
48 transistors

Transistor values for NAND gates
Non-painted end
Painted end
48 transistors
96 transistors

# of Gates # of Transistors Point Value
1 AND Gate = 24 transistors = 10 points
1 OR Gate = 24 transistors = 10 points
1 NOT Gate = 24 transistors = 10 points
1 NAND Gate = 16 transistors = 8 points
Example #1
1 AND Gate
24 transistors
10 points
Example #2
4 AND Gates
96 transistors
40 points

• The purpose of creating transistors is to be able to use them for gates in the second round
• Below is a table of how many transistors are required to create each type of gate that is required in stage 2
• For example: if a team scores a dowel with red end out on the upper assembly line of the and section then they score 96 AND transistors. This translates into 4 AND gates (4 red hangers) that can be used in stage 2
Gate Type
AND
OR
NOT
NAND
Transistors Required Per Gate
24
24
24
16

Integrated Circuit Fabrication
(Coat Hangers and posts)
• This stage of the competition requires teams to take gates
(coat hangers) and place them on PVC pipes jutting from the wooden posts
• The purpose of this stage is to build the cpu pieces or IC’s
(foam pieces) needed for stage
3
• Teams are only able to use the gates (dowels from stage 1) that they have already assembled (from previous or current rounds)
• Lower PVC pipes are half as fast as upper ones
• First tower is the MUX (Multiplexor)
• Second is the Adder
• Third is the Decoder
• Last is the D-Latch (Data Latch)

• Gatekeeper: Clothes hangers represent gates. To build an integrated circuit, calculations must be made to determine the number and type of gates needed to create each circuit.
Remember, inventory is required from Stage 1:
Gate Fabrication Area.
1 Red hanger = 1 AND gate
1 White hanger = 1 OR gate
1 Blue hanger = 1 NOT gate
1 Black hanger = 1 NAND gate

• Hangers can be suspended by the
PVC in any fashion as long as they are not supported by the field
• IC is only as efficient as lowest hanger.
– For example, if a team was building a
D-Latch (needing only two black hangers) and had one black hanger on the upper post and one on the lower post then the team would only receive one D-Latch gate.
– If the team were to place both the black hangers on the upper post then they would receive two D-Latch gates since the upper post is running at double speed

IC
Fabrication
Scoring
MUX Manufactured
Adders Manufactured
Decoders Manufactured
D-Latches Manufactured
80 Points Each
60 Points Each
40 Points Each
60 Points Each
AND
OR
NOT
NAND
MUX or
Adder or
Decoder or
Register &
Memory
Units
D-Latch or
Squares represent colored hangers and the number required to build each integrated circuit. Strategy will determine whether a team uses NAND gates or AND/OR/NOT gates.

Gate Type • Here’s a little recap
– Dowels in buckets = Transistors
– Use table to know how many gates are produced from transistors
– Gates (hangers) are used in stage 2 to produce the foam pieces needed in stage 3 for the
CPU and memory
• MUX = Multiplexor (first tower)
• Adder = (Second tower)
• Decoder = Instruction/Address
Decoder (Third tower)
• D-Latch = Register/Memory Unit
(Fourth Tower)
• Okay, let’s keep going
AND
OR
NOT
NAND
24
24
16
Transistors
Required Per
Gate
24

CPU Fabrication (Foam Puzzle
Pieces)
• The purpose of this stage is to take the foam pieces (CPU and memory components) and place them on the board to make the best CPU and Memory possible
• The foam pieces are representations of the IC’s made in stage 2 with the coat hangers and posts
• D-Latch = Register/Memory Unit
• Decoder = Instruction
Decoder/Address Decoder
• Adder + MUX = ALU

The BEST CPU Fabrication Area consists of two sub-areas:
• Core Processor Area (located on the left)
• Memory Module Area (located on the right)

A BEST Core Processor requires:
• (3) Registers (made by placing one D-Latch into each designated area)
• (1) Instruction Decoder (made by placing one
Decoder into the designated area)
• (1) Arithmetic Logic Unit (ALU) (made by placing one MUX and one Adder into the designated areas

A BEST Memory Module is capable of fabricating two types of memory modules:
• 8-bit Memory Module (made by placing one D-Latch into any one of the Memory Unit slots)
• 32-bit Memory Module (made by placing four
D-Latches and one Address Decoder the Memory Unit and
Address Decoder slots)

• Register installed 90 points
• Instruction Decoder installed 60 points
•
• MUX installed in ALU
Adder installed in ALU
120 points
90 points
• 8-bit Memory Module completed 90 points
• 32-bit Memory Module completed 420 points
• 8-bit CPU completed 512 points
• 32-bit CPU completed 1024 points

Gatekeeper utilizes an inventory system that is independent from scoring values:
• Components fabricated in each stage are placed in a team’s inventory
• This inventory is NOT represented physically , but is instead maintained by the BEST Scoring Software
• Hubs will provide a display for viewing team inventory, but it is HIGHLY RECOMMENDED THAT TEAMS TRACK THEIR OWN
INVENTORY

1. Sort
2. Set in order
3. Shine
4. Standardize
5. Sustain
The 5S Bonus is awarded at the completion of each match for maintaining a clean and safe work environment:
• 5S Bonus is calculated at the end of each match but is not finalized until the end of the round
• 5S Bonus will be awarded at the end of a match, if no game pieces have been removed from play, and any game pieces in contact with the floor are also in contact with the robot
• The maximum 5S per round is 10% of the scored amount