So the sensors are somewhat set in stone (standard automotive temp,=20 pressure sensors), but the "plug" that's attached to the sensors (on the=20 right in the sketch) has a small micro in it, which is what converts it=20 to digital. That's in an aluminum tube but not sure if that tube is=20 grounded already. From here on, I have control over the wiring, and=20 using the extensions to avoid hacking the original wiring. Most of the=20 wires will end up going through one large bulkhead grommet, so I'm=20 mostly worried about noise from other parallel wires such as tach signal=20 (coming from the ignition coil), or even non-parallel nearby spark-plug=20 wires, though I will try to avoid those. CHT sensors are mounted on=20 spark plugs so are unavoidably close in some parts. Will look into=20 chokes, thanks. Cheers, -Neil. On 4/4/2017 11:25 AM, Sean Breheny wrote: > Neil - what you have shown is a good strategy for dealing with noise whic= h > is coupled electrostatically. If there are magnetic noise sources, this m= ay > not be adequate. The best strategy overall is to have the sensor inside a > faraday cage and make the cable shield continuous with that cage. Of > course, that is rarely practical. The next best thing is to use the shiel= d > as the ONLY ground reference for the sensor, and possibly add a ferrite > choke around the entire cable if there is a noise source >10MHz or with > fast edges. > > On Mon, Apr 3, 2017 at 8:50 PM, Neil wrote: > >> Well, this is what I have The shield does go through the extension >> http://bit.ly/2nV910D >> >> Cheers, >> -Neil. >> >> >> On 4/3/2017 11:47 AM, Van Horn, David wrote: >>> Could you add a pin on the connector so your extension cable picks up >> the shield but the other equipment does not? >>> -----Original Message----- >>> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On >> Behalf Of Neil >>> Sent: Sunday, April 2, 2017 5:11 PM >>> To: Microcontroller discussion list - Public. >>> Subject: [EE] Shielding through extension wires >>> >>> What's the correct way to shield wires with extensions? Let's say I >> have a cable, made of 2 connectors with shielded cable in between. I'd h= ave >> the shield connected to one of the terminals on each connector, and that >> gets grounded on one side only. But if I extend the wires with a M-F >> extension cable, is it correct to pass the ground/shield into the >> extension? It would still stay grounded at one side. Or is there a bet= ter >> way? FWIW, the connectors are not shielded... they're regular Hirose DF= 3 >> connectors. >>> Cheers, >>> -Neil. >>> >>> -- >>> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at http://mailman.mit.edu/ >> mailman/listinfo/piclist >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .