Section 4 - Camera Hardware
A
wiper
B | C |
potentiometer
+ relay
c
nc 
no
B | C |
A
- relay
c
nc
no
A: Unmodified Joystick
B: Modified Joystick
Figure 4.3 - Joystick Modification
A slight variation on the joystick modification is to build a complete joystick eliminator as shown in Figure 4.4 below. The only difference between this and the previous modification is that two fixed resistors per axis are used to simulate the potentiometer at its mid position. You do not need to make modifications to the joystick; you essentially build an unadjustable version. This may be easier than modifying your hand controller if you can trace out the wiring of your joystick to its connector.
A
wiper
B | C |
R potentiometer
+ relay
c
no 
nc
B
A
- relay
c
nc no
C
A: Unmodified Joystick
R/2 R/2
B: Joystick Eliminator
Figure 4.4- Joystick Eliminator
4.5.Modular Family of CCD Cameras
With the introduction of the
The benefits of a modular line of CCD Cameras are manyfold. Users can buy as much CCD Camera as they need or can afford, with the assurance that they can upgrade to higher performance systems in the future. With a modular approach, camera control software like CCDOPS can easily support all models. This last point assures a wide variety of third party software. Software developers can produce one package for the many users across the model line instead of different packages for each of the cameras.
While the SBIG cameras have many similarities, there are also important differences between the products. Table 4.2 below highlights the differences from a system's standpoint:
Page 26