Home > GCSE Projects > Snooker Scoreboard
SNOOKER SCOREBOARD

Modified: 21:51, 26 October 2013

Circuit designed by Phil Townshend

This scoreboard was developed to keep track of snooker scores.

It will actually count from 0 to 999. There are 3 controls to the circuit. Up and down which will auto repeat if held down to set higher or lower numbers quickly - such as setting up a darts game at 501. Also there is a reset which will reset the display to zero - in fact it resets the entire PIC program but has the same effect. The PIC used is a PIC16F818/9.

DOWNLOAD PCB and circuit details

If you have any questions please contact us.

This project used two of the PCB's but the reset inputs were wired together into one reset switch (shown centre).

A programmed PIC is available
from our shop.

A kit for this project is currently avaiable - please see our shop for details.

CIRCUIT DIAGRAM

Above is the circuit diagram which is a pretty standard configuration for a small PIC. There are 8 segment drives, a-g and dp, and 3 digit drives. These use transistors to switch on each digit, so displays must be common cathode types. You can also use a PIC 16F627 instead as this also has internal clock facility.

Below can be seen the interior of the version made. There are two identical PCB's with a common reset connection. The circuit should run on 4.5 to 6 volts (3 or 4 AA batteries). The version shown used a PP3 battery but a rechargeable which is actually 8.4 volts not 9. This voltage was dropped to 7.7 volts because of the in-line diode for polarity protection.

The maximum rating for the PIC chip is 6v but they seem to survive on 8.4v BUT IT IS NOT RECOMMENDED - YOU
ARE ADVISED TOUSE NO MORE THAN 6V for the supply.
Try adding a voltage regulator circuit if your supply is greater than 7 volts.

Please note the version shown has had the buttons modified and are not the same as the ones in the kit. The kit version has PCB click switches for mounting directly to the PCB. Wires can be brought from the board though to add different switches if desired.

COMPONENT LIST
Passive Components
R1-3 10Kohms
R4-11 220ohms
R12-14 1Kohms
C1 220uF @ 16v Electrolytic
Semiconductors
D1 1N4001
T1-3 BC337
IC1 PIC16F818/9
Misc
DISP1-3 CCathode Super Red 0.56"
SKT 18pin IC holder
SW1-3 Push-to-make PCB switch
SW4 SPST switch
PP3 battery clip
The mould was made from layers of 12mm MDF and some 3mm strips of MDF stuck on the sides. The pockets were drilled and 1.5mm holes drilled right through the pockets to allow the air to escape during vacuum forming. A vertical sander was used to round the corners off ready for moulding.

The polystyrene used was 1.5mm green. Enamel paints were used to complete the colour scheme on the mould with computer generated graphics stuck on the front. The LED displays were covered with semi-transparent red 3mm acrylic to act as a lens.

Back to GCSE Projects page...

www.edutek.ltd.uk - Working Electronics For Students & Teachers