A Feather doubler is used above to show the Feather as well as the display wing. For the actual build, they are stacked using short Feather headers.
The LIDAR requires a 5v power source. To make it mobile, we can use a LiPo battery and a PowerBoost to get 5v. Using the PowerBoost 1000C also gives us a power/enable switch as well as a built-in charger.
Since we're not using the battery circuitry on the Feather (and the code is not very computationally demanding) we could use an ItsyBitsy M0/M4 or Trinket M0 just as well. Using a Feather and the 7-segment wing provides a simple, compact approach to circuit assembly. By the same token, a Feather M0 or M0 Express can be used.
I2C makes this a very simple circuit: both the display wing and the LIDAR use I2C. The only other aspect to the circuit is the PowerBoost which is also simple to connect.
You can quickly tack the LiDAR's wiring to the feather, ignoring the PowerBoost until the final assembly. Simply connect the LiDAR's power and ground to the Feather's USB and Gnd pins. This will let you load code onto the Feather; once things are assembled, the Feather's USB port is inaccessible.