Military-grade circuit board (Fallout 4)

A military-grade circuit board is a miscellaneous item in Fallout 4.

Locations
In the Basement of Listening Post Beta. After activating the elevator and going down, go through the hole in the wall and come to the other side. To your right, it will be on some boxes.

It can also be found on Military based robots.

Военная_электросхема