image/svg+xml
+
_
100k
6k8
10k
470
3VDigitalOut
2N4403
5 V
GND
6
4
7
3
2
2k
47k
20kThresholdadj.
4k7
22k
2k
470LEDbrightness
150
White
Green
Black
Red
OPB732WZ
10k
AnalogTest point
OPA344PA
IR LED Driver
IR detector
Schmitt trigger
Digital Output driver
Visual pulseindication
LED Output driver
2N7000
+
_
100k
1k
10k
47
3VDigitalOut
2N4403
3.3 V
GND
6
4
7
3
2
2k
47k
20kThresholdadj.
3k3
12k
2k
470LEDbrightness
82
White
Green
Black
Red
OPB732WZ
10k
AnalogTest point
OPA344PA
IR LED Driver
IR detector
Schmitt trigger
Digital Output driver
Visual pulseindication
LED Output driver
2N2222
10n(connect directlyacross pins 4-7)