LAMBDA 10-3 OPERATION MANUAL – REV. 3.03 (20110829)
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shutter. Pin 14 can be set high to open the shutter by sending a value such as 0. The logic for
pin 16 is the reverse of pin 14. To open shutter B, send a value of 4 to the port. To close
shutter B, send 0 to the port. Since both shutters are controlled by the same port, you must
combine the values for the two shutters by addition if you have two shutters installed.
Table 8-5. Computer parallel port commands for TTL control of shutters.
SHUTTER A
SHUTTER A
SHUTTER A
SHUTTER A
OPEN
CLOSED
OPEN
4
6
SHUTTER B
SHUTTER B
SHUTTER B
SHUTTER B
CLOSED
0
2
The next chapter describes in more detail how state or position of Shutter A and B can be
controlled by TTL input.
Summary of Contents for Lambda 10-3
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