MS2-Extra Twin Trigger Manual
(e.g. Bike Setups)

Only for use with the MS2-Extra code (HC9S12C64 based microprocessor - MS2 Daughter Board)

NOTE: Please ensure you have one of these daughter boards inside your ECU before continuing. If you have a black microprocessor, then you have an MS1 and these manuals are NOT for MS1 see here for MS1-Extra Manuals

Warning for E-Bay buyers!!
Please see the Official Suppliers list before buying through E-Bay.
This is there for your protection.

Please Note:

All of these instructions / diagrams are to be used at your own risk, like most things there is more than one way to do the same thing, what we have tried to do is to offer a method that we have tested or that others have tested for us. No warranty expressed or implied.

Use at your own risk.
If you do have any suggestions or settings that work please let me know Philip.Ringwood(at)ntlworld.com


Main Index of MS2-Extra Manuals

Layout of Components -- Suggested Supply points -- List of common components and part numbers

Twin trigger e.g. bike crank trigger

Caution: This code needs more testing more on the bench as there appears to be sync issues after stall requiring a restart!!!

Internal Wiring -- Settings

Example:

Only available in MS2/Extra 2.x codes.

Internal Wiring:

Spark outputs come on D14 and D16 (wasted) see HERE for options on driving the coils.

This will normally be a VR style sensor, if not use 2 Hall Sensor Circuits. (See HERE)

V3.0 PCB's

Main Trigger Input - Connect one VR sensor to pin 24 of the MS ECU

Second VR conditioner Circuit - this needs to be built then connected to the other sensor.

DigiKey part numbers:
Farnell part numbers

1K resistor = 1.0KQBK-ND
300R resistor = 330QBK-ND
18K resistor = 18KQBK-ND
39K resistor = 39KQBK-ND
4K7 resistor = 4.7KQBK-ND
1M resistor = 1MQBK-ND
0.01uF Cap = P3103-ND
0.33uF Cap = P10973-ND
330pF Cap = PS1331J-ND
0.1uF Cap = P10967-ND
LM1815N = LM1815N-ND

1K resistor = 509-164
300R resistor = 543-251
18K resistor = 543-688
39K resistor = 543-767
4K7 resistor = 543-548
1M resistor = 544-103
0.01uF Cap = 389-0995
0.33uF Cap = 389-1033
330pF Cap = 867-950
0.1uF Cap = 389-1010
LM1815N = 949-3913

Please note: Above part numbers will need checking, some components will come with a minimum order in multiples of 5 and 10.

 

V2.2 PCB's

Spark outputs come on D14 and D16 (wasted) see HERE for options on driving the coils.

Main Trigger Input - Connect one VR sensor to pin 24 of the MS ECU

Second VR conditioner Circuit - this needs to be built then connected to the other sensor.

DigiKey part numbers:
Farnell part numbers

1K resistor = 1.0KQBK-ND
300R resistor = 330QBK-ND
18K resistor = 18KQBK-ND
39K resistor = 39KQBK-ND
4K7 resistor = 4.7KQBK-ND
1M resistor = 1MQBK-ND
0.01uF Cap = P3103-ND
0.33uF Cap = P10973-ND
330pF Cap = PS1331J-ND
0.1uF Cap = P10967-ND
LM1815N = LM1815N-ND

1K resistor = 509-164
300R resistor = 543-251
18K resistor = 543-688
39K resistor = 543-767
4K7 resistor = 543-548
1M resistor = 544-103
0.01uF Cap = 389-0995
0.33uF Cap = 389-1033
330pF Cap = 867-950
0.1uF Cap = 389-1010
LM1815N = 949-3913

Please note: Above part numbers will need checking, some components will come with a minimum order in multiples of 5 and 10.


Settings

You must set number of cylinders to 4 and wasted coil output.

Both odd and even fire are (should be) supported. If you enable Oddfire on the Engine Constants page you will have access to the "oddfire small angle" on the ignition page. For a 90deg V you would enter 90deg or 270deg in here depending in which way around you wired your triggers.


Suggested points for Supplies inside the V3.0 ECU

 

 

Component Pinouts

Pull up circuit diagram

List of component part numbers used in the ignition section:

DigiKey part numbers:
Farnell part numbers

2N2222A = 497-2598-5-ND
1N4001 = 1N4001/4GICT-ND
1K resistor = 1.0KQBK-ND
470R resistor = 470QBK-ND
2K resistor = 2.0KQBK-NB
330R resistor = 330QBK-ND
680R resistor = 680QBK-ND
200R resistor = 200QBK-ND
270R resistor = 270QBK-ND
1K5 resistor = 1.5KQBK-ND
4K7 resistor = 4.7KQBK-ND
0.01uF Cap = P3103-ND
4N25 (opto) = 4N25ASHORT-ND

2N2222A = 920-7120
1N4001 = 352-5326
1K resistor = 509-164
470R resistor = 543-305
2K resistor = 543-457
330R resistor = 543-263
680R resistor = 543-342
200R resistor = 543-214
270R resistor = 543-240
1K5 resistor = 543-421
4K7 resistor = 543-548
0.01uF Cap = 389-0995
4N25 (opto) = 102-1090

Please note: Above part numbers will need checking, some components will come with a minimum order in multiples of 5 and 10.


If you have a question, comment, or suggestion for this FAQ please post it on the forum.

No part of this manual may be reproduced or changed without written permission from James Murray, Ken Culver and Philip Ringwood.