1. OPA wiring
To Scope
EHD V
100K
10K

2. EHD Shaker shaft OPA Wire from OUT-A to the scope through BNC port
Wire connecting the ground on the PCB to the housing
Wire connecting the ground on the PCB to the housing. When disconnected the OPA output goes from saturation to zero
Wire from OUT-A to the scope through BNC port
EHD
Shaker shaft
Below the floor there is another box where the shaker is. There is a small slit at the floor that connects the shaker to the shaker shaft that holds the EHD
The box can be closed