XIMEA xiX-XL, Руководство пользователя

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Output wiring example: LED Driving
LED can be driven directly by camera digital output. A series resistor must be used to limit LED current.
Figure 36: LED driving
LED series resistor can be calculated by the following equation:
R =
V
PSU
−
V
output
−
V
LED
I
LED
,
where:
V
PSU
is power supply voltage (5 V to 24 V),
V
output
is voltage across digital output pins (see. Optically isolated digital outputs ),
V
LED
is LED forward voltage (see table below),
I
LED
is LED current.
Remember to use the appropriate resistor power rating:
P ( RES ) = I
2
LED
×
R = ( V
PSU
−
V
LED
)
×
I
LED
Typical LED forward voltage:
LED Colour V
LED
(typ.) V
LED
(max.) Note
Standard Red 1.7 V 2.1 V -
Super Bright Red 1.85 V 2.5 V -
Low power Red 1.7 V 2.0 V -
Orange 2.0 V 2.1 V -
Yellow 2.1 V 2.2 V -
Green 1.9 V 2.5 V -
Emerald Green 2.1 V 2.7 V -
Blue 2.5 V 3.7 V -
White 2.8 V 3.8 V -
Infra-Red 1.3 V 1.8 V Opto coupler
Table 22: digital output, LED driving
XIMEA Technical Manual, Version: v240108 44