Celestron Compustar Manuel d'utilisateur télécharger pdf (Page 2)

MODIFYING THE JOYSTICK

7. The Compustar computer has three DB-9S connectors located on the front edge. The

basic Compustar has nothing connected to any of these connectors. The connector on the

right is for the joystick, the centre connector is for an Auto-Guider accessory and the left

connector is an RS-232 computer interface.

8. Unless the joystick you have has a

male DB-9 connector already on the end of

the cord it will have to be replaced with

one so you can plug it in.

9. As you can see in the schematic, the

DB-9 connector will use 8 wires coming from

the joystick. Unless the cord on the

joystick has at least 8 wires in it then

the whole cord should be replaced.

10. It is possible to get away with as

few as 6 wires in the cord going to the DB-

9 connector. The schematic shows that Pin

#6, #7 and #9 are actually connected

together. These three pins can have

jumpers installed at the connector and use

a common wire through the cord to the

joystick. It all depends on the

manufacturer of the connector as to whether

this is easy or not. I feel that it is

easier to change the whole cord and make

all the connections inside the joystick

where there is much more room.

11. You can see that this joystick has a

connector that is compatible with a

gameport. It will have to be changed for

the DB-9 connector on the right.

12. Even though the gameport connector has 15

pins, this joystick only has 6 wires in the

cord. Due to this fact, I have decided to

change the whole cord along with the connector.

I was able to pick up a four foot 9 pin

extension cord from a computer surplus store

for $2.99. It will be just right to replace

the cord on the joystick.

13. I cut off the female connector on the

extension cord. Then I stripped back the

insulation. In order not to have any problems

with connecting the new cord, I performed a

continuity check for each pin to determine the

corresponding wire. You should write down

which colour wire corresponds with the numbered

pins on the connector. This will help when it

comes time to connect the cord to the joystick.

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Celestron Compustar Manuel d'utilisateur Page 2

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