Section D: A Real Problem
A student decides to use his knowledge of PIC’s and Electronics to produce a darts score board. The score board will indicate the on going score and activate a results display when the score hits 501. In order to solve this problem he divides his efforts into several steps.

Step 1: Design a System diagram.
Step 2: Generate the Circuit diagram.
Step 3: Use MLAB to write the Assembly language program.
Step 4: Manufacture, Test and Evaluate Solution

Step 3

When a student first attempts to write their program they need to visualise the use of the PORTS on the chip. One technique is shown below.

a
01.	Darts Score Board - Make 501	interactive scoreboard
02.	Darts Score Board Circuit Image	image of functioning system
03.	Darts Score Board - Program	Program to view or print
04.	External Website	Useful Programs: Keypad for use with codelock
a

The aim was to produce an electronics scoreboard using a PIC. The project brief then required the following:-

• The scoreboard should be able to show incremental rises in the players score.
• When a score above 10 was recorded a separate button would be used to record this score.
• Once the player reached a score of 100 a single pulse would be sent to a separate PIC showing the number of 100’s scored.

In practice the student went on to extend this to the scores over a number of games and to include a buzzer to indicate when a player first reached 3 games and had won.