AllPro Kit assembling Notes
AllPro adapter PCB components layout
The component placing is shown below:
Parts List
| Part |
Description |
J1 |
USB type B connector |
J2 |
DB-9M connector |
Q1,Q3 |
2N7000 transistor |
| Q2 |
BS250 transistor |
| IC1 |
MCP2551 |
| IC2 |
MCP2515 |
| IC3 |
PIC18F2455 |
| IC4 |
MCP2021-500 |
| IC5 |
MC78L08 |
| IC6 |
MCP1407 |
| X1 |
Crystal, 16.000Mhz |
| D1 |
Red 5mm LED |
| D2 |
Yellow 5mm LED |
| D3 |
Green 5mm LED |
| D4,D5,D6 |
1N4148 diode |
| R1 |
33K Ohm |
| R2,R5,R11,R12 |
10K Ohm |
| R3,R4 |
100 Ohm |
| R6,R7 |
330 Ohm |
| R9,R10 |
22K Ohm |
| R8,R13 |
510 Ohm |
| R14 |
1K Ohm |
| C1,C2 |
22pF |
| C3,C4,C8,C10,C12 |
0.1uF |
| C9 |
0.47uF |
| C5,C6 |
560pF |
| C7,C11 |
10uF 16V |
| IC socket |
28 pin socket for IC1 |
Testing the adapter assembly
It is recommended to test the adapter assembly before connecting to the vehicle. Get the 12V DC power supply connected to Pin 1 and 9 of DB9-M connector. Start Windows Hyperterm, connect to the serial port used by adapter, the COM port parameters like parity, speed do not matter as it is a virtual serial port anyway. The communication protocol is text-based with modem-like "AT" control sequences. The adapter command "AT#3" is performing self-diagnostic test, see picture below.
Configuring Windows Driver
There is no driver required for Microsoft Windows XP/Vista/7 as the adapter using the standard Communication Device Class (CDC) driver usbser.sys included in the distribution. However, Windows doesn’t have a standard INF file for the CDC driver, see Windows Serial USB Driver. Plug the adapter to a spare USB port on your PC. Windows Found New Hardware Wizard will launch. Skip the Windows Update screen and go to install screen. Select "Install from a list or specific location (Advanced)" as shown below and then click "Next". Select the OBD Adapter INF file and configure the driver.
Open the Device Manager and select "Ports (COM and LPT)", the device appears as a "Communication Port". Go to "Port Settings" tab and "Advanced" button. Select the port number you want to use.
Microsoft has a tool for examining the USB connections. USBView.exe is a freeware utility available for download, shows the USB connections tree and displays the details of USB devices connected to it, see the result below:
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