Omron Photo Microsensors |
Dimensions and wiring.
Home sensors are highly recommended on all shutter axis (camera, projectors, fader), and are advisable but not mandatory for translation axes (North/South, East/West, Zoom).
This diagram shows how to wire an IBM PC parallel port to an Omron OR508ND home sensor. The "5 VDC Supply" must be regulated, as this voltage will be directly driving the computer's parallel port, and must be TTL compatible. Note that up to five home senors can be monitored by each parallel port (on pins 10-13 and 15). You can also use the Kuper Logic Connector to accept more sensor inputs.
The Omron OR508ND or equivalent microsensors are available from DigiKey 1-800-344-4539. The ordering information supplied below are DigiKey prices as of April 1995, which have probably changed by now.
|Omron OR508ND Microsensor||OR508ND||$8.97|
|4 Pin connector for the above||OR527ND||$1.90|
Update (07/17/98): According to the folks at Omron, the old OR508ND part number is now EE-SX670, DigiKey part number is still OR528-ND. This is an amplified photomicrosensor with similar connections. Refer to the Digikey catalog for more information.
These programs have a little 'logic osciliscope' and sound cues that lets you easily debug problems with home sensor inputs to the computer.
For more info on home sensors, see this home sensor thread in the OPCS forum.