V3.0 pots R52 and R56
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- Super MS/Extra'er
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V3.0 pots R52 and R56
When those are full-CCW is the wiper (pin 2) connected (minimum resistance) to pin 1 or is it connected to pin 3?
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- Super MS/Extra'er
- Posts: 1986
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Re: V3.0 pots R52 and R56
Where the he!! do you come up with these questions, Bill? Perhaps too much time on your hands?
Are you and I thinking the same thing? I will whip out my spare board in the morning and get you an answer. I am interested also.....
Ken
Are you and I thinking the same thing? I will whip out my spare board in the morning and get you an answer. I am interested also.....
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
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- Super MS/Extra'er
- Posts: 6828
- Joined: Sun May 15, 2011 11:41 am
- Location: Walnut Creek, Calif. USA
Re: V3.0 pots R52 and R56
Thanks, it will save me from having to rip my MS out of the car and opening it. I'm just trying to understand that input better. Zero-crossing detection seems like it should be very simple and reliable, but I realize that circuit also has to accommodate Hall-type 0-5V as well. I'm just wondering how much it deviates from simple VR detect circuits shown in app notes from National and others. I gotta say... the direction those pots go should be on the schematic.
Re: V3.0 pots R52 and R56
Pot connection numbering convention has pin 1 as the 'minimum' end.
Rover SD1 3.5 EFI
MS2 V3
EDIS
Tech Edge O2
London UK.
MS2 V3
EDIS
Tech Edge O2
London UK.
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- Super MS/Extra'er
- Posts: 1986
- Joined: Sat Jul 22, 2006 8:02 pm
- Location: Eureka, NV USA
- Contact:
Re: V3.0 pots R52 and R56
As usual, Dave has the answer!
I wasn't too excited to go out to the shop this morning anyway......... when I saw the snow falling.
Ken
I wasn't too excited to go out to the shop this morning anyway......... when I saw the snow falling.
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
-
- Super MS/Extra'er
- Posts: 6828
- Joined: Sun May 15, 2011 11:41 am
- Location: Walnut Creek, Calif. USA
Re: V3.0 pots R52 and R56
So, what is "minimum", CW? And, do these particular pots conform to "convention"? I have seen many devices (not talking about pots specifically) that go backwards to common convention... A little "CW" near the appropriate pin on the schematic seems like it wouldn't be a huge burden, and would eliminate any confusion.
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- Super MS/Extra'er
- Posts: 6828
- Joined: Sun May 15, 2011 11:41 am
- Location: Walnut Creek, Calif. USA
Re: V3.0 pots R52 and R56
OK, got it, I peeked at some pots I have loose in a drawer; CW has the wiper at term 3.