Photo Interrupter
A Photo interrupter is a transmission-type photo sensor, which typically consists of a light emitting elements and light receiving elements aligned facing each other in a single package, that works by detecting light blockage when a target object comes between both elements, acting as an optical switch.
Parts
1. 1x Photo Interrupter
2. 2x 220ohm Resistors
3. 1x LED
Features:
1. Ultra small.
2. Minimal influence from stray light.
3. Low collector emitter Saturation voltage.
4. RoHS Compliant.
Specification:
Maximum Ratings (Ta=25°C)
|
Parameter |
Maximum Rating |
Unit |
|
INPUT LED |
||
|
Power Dissipation |
75 |
mW |
|
Peak Forward Current(300 pps,10 µ S pulse |
1 |
A |
|
Continuous Forward Current |
50 |
mA |
|
Reverse Voltage |
5 |
V |
|
OUTPUT PHOTOTRANSISTOR |
||
|
Power Dissipation |
100 |
mW |
|
Collector- Emitter Voltage |
30 |
V |
|
Emitter-Collector Voltage |
5 |
V |
|
Collector Current |
20 |
mA |
|
Operating Temperature Range |
-20°C to+85°C |
|
|
Storage Temperature Range |
-55°C to+100°C |
|
|
Lead Soldering Temperature [1.6mm(.063”)From Case] |
-260°C for 5 Seconds |
|
Electro-optical Characteristics (T=25°C)
|
Parameter |
Symbol |
Min. |
Type |
Max. |
Unit |
Test Condition |
|
|
INPUT LED |
|||||||
|
Forward Voltage |
VF |
|
1.2 |
1.6 |
V |
IF=200mA |
|
|
Reverse Current |
IR |
|
|
100 |
µA |
VR=5V |
|
|
OUTPUT PHOTOTRANSISTOR |
|||||||
|
Collector-Emitter Dark Current |
ICEO |
|
|
100 |
nA |
VCE=10V |
|
|
COUPLER |
|||||||
|
Collector-Emitter Saturation Voltage |
ICE(SAT) |
|
|
0.4 |
V |
IC=0.25mA IF=20mA |
|
|
On State Collector Current |
IC(ON) |
1 |
|
10 |
mA |
VCE=5V IF=20mA |
|
|
Response Time |
Rise Time |
TR |
|
3 |
15 |
µS |
VCE=5V, IC=2mA RL=100 Ω |
|
Fall Time |
|
|
4 |
20 |
|||
Application
1.You can use the photo interrupter for controlling the position of a moving part (check if the part is in the desired position or not) or you can count pulses from a rotating index disc to measure the rpm of your motor (aka rotary encoder) or whatever you want.
2. Sensing & Instrumentation, Computers & Computer Peripherals.
