MRI-Compatible Piezoelectric Controllers

Mixed-signal driver boards for the piezoelectric motors used in MRI-compatible surgical robots at the WPI AIM Lab. They run near the bore of an MRI without disturbing imaging. Card-based backplane, several revisions, a few bodge wires.

Title: MRI-Compatible Piezoelectric Controllers
Id: 1/14
For: WPI AIM Lab
Date: 2018
Mask: #0F5735
Type: Circuit boards, medical, electronics
Sheet: /work/mri/
File: src/content/projects/mri.md
Link: AIM Lab website

Driver cards plugged into the backplane and powered. The slots are labeled by axis. — Fig. 1Driver cards plugged into the backplane and powered. The slots are labeled by axis.

Cards from a revision in red soldermask. Each has a four-digit display on its front edge. — Fig. 2Cards from a revision in red soldermask. Each has a four-digit display on its front edge.

Bare backplane, v3. One slot per axis, Axis #0 to Axis #11. — Fig. 3Bare backplane, v3. One slot per axis, Axis #0 to Axis #11.

Another backplane revision, bare. Eight card slots. — Fig. 4Another backplane revision, bare. Eight card slots.

PCB edit at U14, through the microscope. A resistor on top of the part, with a fine wire to one pin. — Fig. 5PCB edit at U14, through the microscope. A resistor on top of the part, with a fine wire to one pin.

The same edit at U19. — Fig. 6The same edit at U19.

Next sheet, 2 of 14

Interactive MoonBadge

Built at Technocopia, 2019.

An interactive e-paper badge made for the 50th anniversary of the Moon landing.

Interactive MoonBadge photo