rusefi / alphax-4chan

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was: where are TPS/PPS pull-downs now: lower pull-downs on rev C #34

Closed rusefillc closed 2 years ago

rusefillc commented 2 years ago

[4:44 PM, 6/12/2022] Norman AplhaX rusefi PR: i have one question, i'm trying to find my answer in the schematic but i can't open the part about analog inputs

do the analog inputs have tiny (100kohm) pulldowns/pullups to detect open circuit? [4:44 PM, 6/12/2022] And: yes and no [4:44 PM, 6/12/2022] And: no and yes [4:44 PM, 6/12/2022] Norman AplhaX rusefi PR: or should those be added externally if such a thing is desired (because i assume it would throw off scaling of analog sensors) [4:44 PM, 6/12/2022] And: some do have 500K for sure [4:44 PM, 6/12/2022] And: some have 10K [4:45 PM, 6/12/2022] And: i guess what exact channels do you care about? [4:45 PM, 6/12/2022] Norman AplhaX rusefi PR: specifically PPS1/2 and TPS1/2 [4:45 PM, 6/12/2022] And: i bet those have weak pull-downs

andreika-git commented 2 years ago

TPS1, PPS1: 680k pull-downs TPS2, PPS2: 10k pull-downs

mck1117 commented 2 years ago

10k is too strong btw, they should be more like the 680k

andreika-git commented 2 years ago

image

rusefillc commented 2 years ago

@ElDominio FYI