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 Post subject: Explain "inverted"
PostPosted: Sat Oct 08, 2022 8:44 pm 
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Joined: Wed Oct 18, 2017 2:27 pm
Posts: 47
Location: Pembroke, NH
Carberry...

Maybe I'm just slow... but inputs...NLTS with blower switch vs NLTS with inverted blower switch..... what's the difference? I always want to run a ground to a switch and then to the corresponding ecu pin right?

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98 USDM RS Coupe w/ EJ207-V7 AVCS 4.444 5MT Carberry-Full SD. Build Log: http://www.rs25.com/forums/f145/t151047-nasti-rs.html


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 Post subject: Re: Explain "inverted"
PostPosted: Sun Oct 09, 2022 3:13 am 
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Joined: Thu Dec 18, 2014 10:31 pm
Posts: 1529
Location: oregon
some switches will have the normal status condition be 0, and the switched condition be 1
invert that, and the normal status will be 1, and the switched condition will be 0.

if the normal status of the pin is to be grounded with <1v potential at the pin, and then switched condition is open, with >10v potential at the pin, then setting it up so that open is normal and grounded is switched, using an SPST switch, you'd set the pin to be inverted in the table because you flipped which state is normal.

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 Post subject: Re: Explain "inverted"
PostPosted: Sun Oct 09, 2022 4:07 am 
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Location: Pembroke, NH
jon7009 wrote:
some switches will have the normal status condition be 0, and the switched condition be 1
invert that, and the normal status will be 1, and the switched condition will be 0.

if the normal status of the pin is to be grounded with <1v potential at the pin, and then switched condition is open, with >10v potential at the pin, then setting it up so that open is normal and grounded is switched, using an SPST switch, you'd set the pin to be inverted in the table because you flipped which state is normal.


Ok, I was sort of correctly assuming that part of the logic, I guess my question is more in the application logic..maybe if I explain what I'm trying to do... I just want to make sure I'm doing it/understand it right. The "why" would it be inverted or not is what gets me.

NLTS
Clutch Input: Using: Intercooler Autowash
Wiring: Chassis ground---->clutch switch------>Blower Pin on ECU. (B12) B135 Pin 12 (WR) On=0 Off=10-13

Clutch Switch:
(OFF)=0 (in logger/switch input) Clutch Not Depressed = Switch closed = ECU see's "Grounded" because it connects to the chassis ground.
(ON)=1 (in logger/switch input) Clutch Depressed, switch opens = ECU see's 10-13v

If that's right, I want to invert because "On" on the ECU Pin for the autowash is grounded but "Off" on the clutch switch is grounded?

My current configuration plan is:

Logging: Defog Pin
NLTS Activation Input: Blower Switch pin (A9) B134 Pin 9 (GR) On=0 Off=10-13
Launch Control Activation Input:Blower Switch pin
Global Map Switch with Blower Switch pin

Blower Switch is NOT inverted because On=Grounded so I would just run wiring as: Chassis Ground--->SPST switch---Blower switch pin on ECU?

Map 1: Low Boost, no fun
Map 2: High Boost, Launch Control, NLTS Active. (Im too much of a puss to enable anti-lag)

Is this...right or am still an idiot?

ECU:4L (207 v7)
Carberry/Full Speed Density

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__________________________________________________________________
98 USDM RS Coupe w/ EJ207-V7 AVCS 4.444 5MT Carberry-Full SD. Build Log: http://www.rs25.com/forums/f145/t151047-nasti-rs.html


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 Post subject: Re: Explain "inverted"
PostPosted: Sun Oct 09, 2022 2:51 pm 
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Joined: Thu Dec 18, 2014 10:31 pm
Posts: 1529
Location: oregon
basically, something like that.

for instance, I had antilag activation by TID switch, not inverted. switch was mechanically open when the circuit was open, off being positive pin voltage. closed, grounded, was on. because I wanted target boost and wastegate duty to change, I set it to inverted TID switch, and map 2 became normal, and map 1 became antilag=on.

I had to do it this way, because I had combined another switching status pin into a switching arrangement, where I needed it to be the same pin potential for status type, on or off, grounded or not.

If I wanted normal TID on map1/map2 with map 1 being off and map 2 being on, then I would have had to have had TID be normal while grounding the pin, and switched be open, and then ALS would have needed to be activated by inverted TID.

I wanted the failed state of either switch circuit to be open, just as being off is open. if condition state for something to be off is grounded, and a wire gets pulled, you're stuck in the on state.

I also wanted launch control to only be on when antilag was also on, so with two SPST switches, I had the ALS go to ground, but the second switch only made a connection to the same pin as antilag, not to ground. so the LC switch would only ground in the on state if the antilag switch was also grounded, but did not automatically ground the LC pin unless the LC switch was also on. basically, the LC switch just connected itself to the ALS pin, and without that switch on, the ALS pin being grounded wouldn't change the ground of the LC pin.

furthermore, you could have NLTS activation from one pin, LC from another, and map switching from another, and then combine all the pins at one point before running out to one SPST switch, to ground, forcing them all to switch at the same time.

or, you could run a wire from each pin up to a 5 or 6 way radial switching potentiometer.

you could do something like:

1. normal
2. +LC
3. +LC+NLTS
4. map 2
5. map2+LC
6. map2+LC+NLTS

or

1. normal
2. +LC
3. +LC+NLTS
4. map 2
5. map 2+LC+NLTS

you can get radial switches from Stewart Macdonald, aka: Stewmac.com

in this setup, you only have one wire to ground, but would use three voltage potential pins from the ecu, and the mechanical switch would alternate which pins are grounded.

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venmo @ jon7009, 1047 when asked
jedilley@gmail.com for paypal


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