Basic HTML Version
Opto Theory
The opto receiver (Photo Transistor) should be approximately 0.1 - 0.7 volts when the opto beam
is unblocked and approximately 11 - 13 volts when the opto beam is blocked. The opto
transmitter (LED) should always be approximately 1.4 volts.
Note:
The transmitter (LED) is
larger than the receiver (Photo Transistor); it protrudes further from its case.
LED Boord
Ircnsm.tter
1.G-I.~ Volls
Ph
oto
T
ro nsisto
l:loc rc
Receiver
0.1-0.7V Jnblocked
11- 13V
Blocked
WHl
rr~
!Pl
i
i
~
!
I
•
Blue
o
~-
. .
~ -
~
Orange-XXX
infrared
Roy
Gray-XXX
Blac~
1-43