AiM MyChron3 Visor User Manual

TECHNICAL DOCUMENTATION 10/06/2005 GAUGE

Notes: MyChron 3 Visor technical documentation, dimensions and pinout. Version 1.09

SPEED

BEACON POWER-COM

Figure 1: MyChron 3 Visor

Introduction

MyChron 3 Visor represents the new generation of “High-technology” Aim

data acquisition systems for car racing.
MyChron 3 Visor samples and displays speed and lap (split) times.
Moreover it can be interfaced with the engine’s ECU using a Serial / CAN
cable connected to the POWER/COM input to sample all the channels
acquired from the ECU.
To have a complete list of compatibles ECUs, communication protocol and
connection with AIM logger, please refer to “documents” page of our
website www.aim-sportline.com, where You find a dedicated datasheet
called ECU-AIM logger.

The logger records the following parameters:

• lap and split times;

• 1 speed input;

• All the channels acquired from the engine’s ECU.

Data are stored in a the 512 kb internal flash memory and may be
downloaded to a PC through an USB cable. Please, refer to Figure 2 to
get further information concerning the gauge’s display.

Gear display

10 fully configurable shift lights

MyChron 3

VISOR

Speed unit of measure

RPM graphical bar

Configurable RPM scaling

2nd displayed channel

Temperature unit of measure

1st displayed channel

Displayed input channels

USB port

Low battery warning
Night vision
RPM digital value

Speed
Best lap time
Battery voltage

4 alarm led:
from "AL 1" to "AL 4"

Lap / Split times

Figure 2: MyChron 3 Visor display

Technical documentation: MyChron 3 Visor Version 1.09

1

Installation notes

• We recommend You to choose a place where both display unit and
“Junction box” are not in contact with oil or fuel; make sure that the
gauge is not installed too close to heat sources and protect the
instrument from vibrations.

• We remind you that your MyChron 3 Visor is not equipped with
internal batteries, so it needs to be powered by an external power
source (i.e. the car’s battery).

• Once the gauge has been correctly installed, you may plug the
speed sensor and the beacon receiver inside the female connectors
located on the Junction box’s front panel. Moreover, you may
connect the gauge to the engine’s ECU using a serial/CAN cable.

How to connect MyChron 3 VISOR to the ECU

To connect MyChron 3 Visor to the ECU, please use a serial/CAN cable
connected to the gauge’s POWER/COM connector, as shown in Figure 4.

SPEED

BEACON

Figure 4: How to connect your MyChron 3 Visor to the engine’s ECU

How to connect MyChron 3 Visor to the PC

In order to connect your MyChron 3 Visor to the PC, please use the USB
data download cable and plug it both in the gauge’s USB port and in the
PC’s USB port, as explained in Figure 5. Please remember to use a 9-15

Volts external power source in order to be able to switch the gauge on.

9 – 15 VDC

POWER-COM

ENGINE'S

ECU

SPEED

POWER-COMBEACON

Figure 5: How to connect your MyChron 3 Visor to the PC

Technical documentation: MyChron 3 Visor Version 1.09

2