# Two IMU's on the VOXL

Source: https://forum.modalai.com/topic/486/two-imu-s-on-the-voxl
Category: Flight Core and Legacy VOXL (https://forum.modalai.com/category/9/flight-core-and-legacy-voxl)
Tags: voxl
Posted: 2021-10-07 21:48:00 UTC by colerose
Replies: 2 · Views: 1096

## colerose · 2021-10-07 21:48:00 UTC

It appears that there are two imu's (imu0 and imu1) available on the VOXL. Out of curiousity, what is the motivation behind having two imu's on the VOXL. Do they serve different functions?

## Reply by Chad Sweet (ModalAI staff) · 2021-10-08 15:56:56 UTC

Mostly for redundancy. In reality only one is typically used. If developers wanted to take advantage of two for fusion they could

## Reply by m4v3r · 2021-10-09 01:29:59 UTC (in reply to Chad Sweet)

@Chad-Sweet how many ekf_imu instances would you suggest running on a VOXL-FLIGHT in general, considering a decent workload already on the VOXL -part?
cheers