limit for the amount of sensors on 5 Vref ?

Yves · Post by **Yves** » Mon Feb 12, 2018 4:12 am

Is there a limit to the amount of 5Vref sensors that can be connected to the ecu ? I already have a fair amount of them connected and since I'm making some corrections to my intake manifold I was considering adding 8 maps (one for each cyl). I intend to use the maps to properly balance each cylinders air flow. (ITB's btw)

Post by **jsmcortina** » Mon Feb 12, 2018 5:21 am

You need to keep the current below the maximum of the regulator, but also remembering the power it will need to dissipate at that current.

James

Yves · Post by **Yves** » Mon Feb 12, 2018 6:17 am

Thanks James, but I might have missed what the current rating is. Do you know ?

sturgeo · Post by **sturgeo** » Wed Feb 14, 2018 5:24 am

The part is shown as a LM2937ET-5.0 on the V3.0 hardware schematic, if this matches what you've got it is upto 500mA.
Please note this is a total amount for the whole ECU, not just what is available to external devices on 5v Vref.

Megasquirt Support Forum (MSEXTRA)

limit for the amount of sensors on 5 Vref ?

limit for the amount of sensors on 5 Vref ?

Re: limit for the amount of sensors on 5 Vref ?

Re: limit for the amount of sensors on 5 Vref ?

Re: limit for the amount of sensors on 5 Vref ?