ELM322P View Datasheet(PDF) - Elm Electronics

Part Name

Description

Manufacturer

ELM322P

OBD (VPW) to RS232 Interpreter

Elm Electronics 

OBD

Interface

16

(Battery

Positive)

0.47µF

5

(Vehicle

Ground)

2

(Bus +)

100Ω

ELM322

78L05

+5V

78L08

+8V

10KΩ

Notes: - NPN transistors are

2N3904 or similar

- PNP transistors are

2N3906 or similar

- Diodes are 1N4148,

or 1N4001, etc.

+5V

+5V

‘Power On’

LED

750Ω

+5V

0.01µF

4.7KΩ +5V

RS232

Interface

(DB9F)

27pF

1

3.58MHz

2

3

27pF

4

+5V

10KΩ

4.7KΩ

8

7

6

5

10KΩ

47KΩ

2.0KΩ

Figure 5. Another Possible Configuration

4.7KΩ

0.1µF

2 (RxD)

5 (SG)

100KΩ

3 (TxD)

1 (DCD)

4 (DTR)

6 (DSR)

7 (RTS)

8 (CTS)

ELM322DSF

Elm Electronics – Circuits for the Hobbyist

< http://www.elmelectronics.com/ >

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