ELM329
Example Applications (continued)
CAN-L
14
+5V
R7
4.7KW
6
CAN-H
R7
R8
100W
100W
D2
5.0V
TVS
8
1
7
6
5
L6
PWR
C7
560pF
C8
560pF
U2
MCP2551
R6
470W
2
3
4
+5V
C9
0.1µF
+5V
OBD
Interface
(J1962)
L1-L4
+5V
R1-4
470W
+5V
28
27
26
25
24
23
22
21
20
19
10
18
11
17
12
16
13
15
U1
329
+5V
+5V
1
2
3
4
5
6
7
8
9
14
R9
470KW
16
X1
4.00MHz
Battery
Positive
R10
100KW
C10
0.01µF
C5
27pF
L5
Active
R5
470W
C6
27pF
D1
U4
RS232
Interface
(DB9F)
+5V
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
C12
0.1µF
C11
0.1µF
1 (DCD)
4 (DTR)
6 (DSR)
7 (RTS)
U3
LP2950
C2
C13-15
0.47µF
+5V
C4
33µF
10V
+
+
C1
0.1µF
50V
C3
0.1µF
10µF
50V
8 (CTS)
3 (TxD)
2 (RxD)
5 (SG)
5
Signal
Ground
Figure 9.
A CAN to RS232 Interpreter
ELM329DSB
Elm Electronics – Circuits for the Hobbyist
69 of 76
www.elmelectronics.com
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