microsquirt module v2.2 confusion

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electronic
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microsquirt module v2.2 confusion

Post by electronic »

I got all my inputs and outputs written down, looked at the manual and some of the info is confusing like pe1 and pa0, one says that pa0 can be used for nitrous input pin, and pe1 is for table switching, and then it says the other way around. I am going to need little help. Let me see if I have everything assigned to the right pin.

aled pin is going straight to air shifter solenoid.
wled is connected to the radiator fan relay
adc2 is connected to a 5v 2.2k pull up resistor and connected to the switch that will ground the circuit and operate air shifter soloenoid.
adc1 is connected to a bap sensor.
flex is connected to 5v 2.2k pull up resistor and then to the clutch switch for launch control.
fidle will be connected to boost control solenoid........( do I need an external transistor?)
pa0 is connected to a 5v 2.2k pull up resistor and nitrous activation switch
pe1 left untouched
pt6 and pt7 will be connected to nitrous solenoids ( once again, will they be able to handle the current?)


Thanks.
Matt Cramer
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Re: microsquirt module v2.2 confusion

Post by Matt Cramer »

What firmware are you using?

Whether the PT6 and PT7 outputs can handle the current will depend on what transistors you have wired them to - they should not be wired to a nitrous solenoid directly under any circumstances.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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Re: microsquirt module v2.2 confusion

Post by electronic »

I am using 3.3.3 firmware. I don't have anything connected to them right now. What transistors should I use to drive the solenoids? and Does the rest of it look like it will work?

Thanks.
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Re: microsquirt module v2.2 confusion

Post by dontz125 »

FLEX/PE0 and PE1 are the only two pins that can be used for Table Swap; PA0 has many options, but TS isn't one of them.

FLEX/PE0 has an on-board pull-up to Vcc as well as a 1k limiting (series) resistor; I would recommend adding a safety diode (band towards the switch). I would recommend the full going-low guard circuit for PA0 as it has NO protective components. If you choose to use PE1 for anything, it needs the same protective circuit.

FIdle can drive the Boost Solenoid as-is; no extra parts are needed.

Suggested transistors for the relay solenoids are 2N2222A, as shown in the MS2/V3.0 manual, in the Nitrous section. Be aware that the comment regarding the use of the IAC pins to drive the relays directly only applies to a boxed MS2 with its on-board stepper driver chip; a MicroSquirt Module has only bare processor pins at PT6/7, and - as Matt noted - must not be exposed to the great outdoors.
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Re: microsquirt module v2.2 confusion

Post by electronic »

ok.
about to finish everything up, here's what I got so far.
Aled will be going straight to air shifter solenoid, the other side of air shifter solenoid will be going straight to 12v, no relay.

Wled will be grounding a relay to run on/off radiator fan.

Adc2 will be used as input for launch control, it will be connected to clutch switch which is grounded when the clutch is pressed.

flex will be used as input for air shifter, will be connected to a 5v pullup resistor, and to the switch which will be grounded to activate air shifter.

Fidle will be connected straight to boost solenoid, and solenoid will be connected to 12v.

Pa0 or Pe1 will be nitrous control input pin, it will be protected with a diode and will have a 5v pullup resistor, it will be connected to an arming switch which will be grounded when armed.

pt7/pt6 will be connected to nitrous solenoids with 2n2222 transistors which will activate the relays that will open and close nitrous solenoids.

Since I couldn't find any info on the microsquirt module v2.2, I just used schematic from an ms2/v3.0 megasquirt.

Any input will be appreciated.
electronic
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Re: microsquirt module v2.2 confusion

Post by electronic »

dontz125 wrote:FLEX/PE0 and PE1 are the only two pins that can be used for Table Swap; PA0 has many options, but TS isn't one of them.



FIdle can drive the Boost Solenoid as-is; no extra parts are needed.

Be aware that the comment regarding the use of the IAC pins to drive the relays directly only applies to a boxed MS2 with its on-board stepper driver chip; a MicroSquirt Module has only bare processor pins at PT6/7, and - as Matt noted - must not be exposed to the great outdoors.

So can the Fidle drive boost solenoid? This isn't cased microsquirt, it's a microsquirt module. I won't be driving any relays with fidle, just boost solenoid.
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Re: microsquirt module v2.2 confusion

Post by jsmcortina »

electronic wrote:Since I couldn't find any info on the microsquirt module v2.2, I just used schematic from an ms2/v3.0 megasquirt.

Any input will be appreciated.
Try looking in the Microsquirt Module Developers Guide.

James
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electronic
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Re: microsquirt module v2.2 confusion

Post by electronic »

jsmcortina wrote:
electronic wrote:Since I couldn't find any info on the microsquirt module v2.2, I just used schematic from an ms2/v3.0 megasquirt.

Any input will be appreciated.
Try looking in the Microsquirt Module Developers Guide.

James
I just went over it, wasn't much help to me.
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Re: microsquirt module v2.2 confusion

Post by Matt Cramer »

There is another schematic for it here:

http://www.microsquirtmodule.com/mod_hardware.htm
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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Re: microsquirt module v2.2 confusion

Post by dontz125 »

electronic wrote:So can the Fidle drive boost solenoid? This isn't cased microsquirt, it's a microsquirt module. I won't be driving any relays with fidle, just boost solenoid.
*ahem* *ahem* In a slightly clearer voice this time...
dontz125 wrote:FIdle can drive the Boost Solenoid as-is; no extra parts are needed.
:lol:
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Re: microsquirt module v2.2 confusion

Post by jsmcortina »

Matt Cramer wrote:There is another schematic for it here:

http://www.microsquirtmodule.com/mod_hardware.htm
That's the same schematic as in the Microsquirt Module Developers Guide.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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