Having constructed circuits on proto boards, it is typical to plug these into a backplane – however, access to the board can be hampered by the adjacent circuits. Using the range of extender boards from Vero Technologies allows the development board to remain in-circuit, but physically free for probing. The range covers 64 and 96 connectors in 3U and 6U formats of various depths. Additional hardware allows 3U extenders to be joined and support / ejector hardware provides mechanical support to the board under test.