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Q: How can I control an SBIG CFW8, Optec,
or Homeyer filter wheel using the parallel port?
A: This is described in the on-line help under
Filter Wheel Setup / Parallel Port Filter Wheel. In short: Use the
"CFW8 Parallel" driver. You need to make a simple adapter cable
to go from the 25-pin connector on the PC to the 9-pin connector on the
filter wheel. The connections are as follows:
Signal
Pulse
Ground |
PC Parallel Port
Pin 2
Pin 25 |
Filter Wheel
Pin 2
Pin 5 |
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Q: How do I power a CFW8 filter wheel without
using an SBIG camera?
A: You need to supply +12V on pin 8; ground is
on Pin 5
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Q: Can I run an SBIG-interface filter wheel from a serial port?
A: Yes, the Homeyer driver works via the serial port. Note, however, that not all such
filter wheels are compatible with the higher voltages on the RS-232 port. Damage to the
filter wheel might result if the maximum input voltage is exceeded. We have only verified
at this time that Homeyer wheels are compatible with this interface.
The following circuit will convert the voltages on a serial port output to work with a CFW8-style
filter wheel. Note: use this circuit at your own risk; incorrect wiring could damage the filter wheel.
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Q: My camera or filter wheel has a small
connector with three wires. What are the equivalent pins for the 9-pin
connector?
A: White is Pin 2, Black is Pin 5, and Red is
Pin 9.
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