Circuit diagram
LM75 I2C Temperature Sensor
Surface Mounted Components
I2C address (0xC0/C1): 1.1.0.0.A2.A1.A0.RW
I2C address (0x90/91): 1.0.0.1.0.0.0.RW
LM75
GND GND
100N
GND
+3V3
PCA9532
GND
100N
GND
1K5 or 2K
+3V3
1K5 or 2K
+3V3
2K
RED
+3V3
2K
RED
2K
RED
2K
RED
2K
RED
2K
RED
2K
RED
2K
RED
2K
2K
2K
2K
2K
2K
SDA
1
SCL
2
VCC
8
GND
4
OC
3
A0
7
A2
5
A1
6
U6
C10
OC
LED0
4
LED1
5
LED2
6
LED3
7
LED4
8
LED5
9
LED6
10
LED7
11
LED8
13
LED9
14
LED10
15
LED11
16
LED12
17
LED13
18
LED14
19
LED15
20
GND
12
VDD
24
A0
1
A1
2
A2
3
RESET#
21
SCL
22
SDA
23
U7
C11
R58
R57
R43
LED11
R44
LED12
R45
LED13
R46
LED14
R47
LED15
R48
LED16
R49
LED17
R50
LED18
R51
R52
R53
R54
R55
R56
GPIO_26-SDA GPIO_26-SDA
GPIO_27-SCL GPIO_27-SCL
GPIO_35-KEY
GPIO_17-KEY
GPIO_18-KEY
GPIO_39-QB
GPIO_0-RESET
GPIO_29-PWM
GPIO_28-PWM
GPIO_30-PWM
GPIO_9-LED-SSEL
GPIO_32-GPIO
GPIO_33-GPIO
GPIO_38-QA