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History of MembersPage/GergelyLezsak/TriggerFanNoise
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2014-09-23 12:14:57 . . . . MembersPage/GergelyLezsak [Problem solved by attenuator]
2014-09-16 09:32:19 . . . . i16-les02-ntr-176-186-108-97.sfr.lns.abo.bbox.fr [shield again]
2014-09-16 09:11:31 . . . . i16-les02-ntr-176-186-108-97.sfr.lns.abo.bbox.fr [shield again]
2014-09-15 19:17:32 . . . . MembersPage/GergelyLezsak [response to filtering, shielding ideas]
2014-09-14 10:13:30 . . . . i16-les02-ntr-176-186-108-97.sfr.lns.abo.bbox.fr [grunds?]
2014-09-09 01:25:08 . . . . 87.114.188.141 [I have seen this problem but not solved it]
2014-08-28 14:56:49 . . . . MembersPage/GergelyLezsak [VR noise induced by fan]

Changes by last author:

Changed:
Besides I see no reason for the stock wiring to carry the noise of shield up to the Vems.
Besides I see no reason for the stock wiring to carry the noise of shield up to the Vems.

[GergelyLezsak]Update

I don't know much about shielding, but it is a common practice to connect shield to ground on one side only, to prevent current flow on the shielding. It's probably easier to find a good ground on ECU-side than on the sensor-side. This prevent possible DC offset between grounds also.

Anyway, problem seems to be solved by simple attenuator as planned, a 10/1 voltage divider.

Layout: sensor_signal - -> 10kOhm - -> VEMS_VR_IN - -> 1kOhm - -> GND