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stockmann-lab / shim_amp_hardware_linear

Hardware related to open-source shim amplifier development for MRI research
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Create connector board for low-density (7 x 6) ODU contacts #2

Closed dcstraney closed 1 year ago

dcstraney commented 1 year ago

16 channels per connector: 2 ribbon cables/connector Needs pinout guidance from @jaystock

jaystock commented 1 year ago

Jason can repin 5 twisted pairs on the AC/DC coil. Remove 5 pairs from Connector III and move them to Connector II Pin Connector I from 1A down to 3C (insulating bodies 1-3), leave last 5 pairs unconnected Pin Connectors II and III up from the bottom, leave the top five pairs unconnected.
So use III: 7H → 9K and II: 4H → 6K

Key:   Roman numeral refers to the cable number (I, II, III)   Insulating body is 1-9   For each insulating body, the pin pairs are A, C, D, E, G, H, K (7 pairs)   14 pins per insulating body, 42 pins per cable

dcstraney commented 1 year ago

2x layouts: All pairs are horizontal Connector 1: Fill all pairs starting from beginning (labeled "A" on insulating body; top-left? bottom-right? facing male or female?) towards end; last 5 pairs will be unused Connectors 2, 3: Fill all pairs starting from end, towards beginning; first 5 pairs will be unused

jaystock commented 1 year ago

IMG_6964 2

Note that this photo only includes 32ch (4 amplifier PCBs). We have since added 2 more amplifier boards to support up to 48ch.

jaystock commented 1 year ago

IMG_6978

Here is a photo showing the ordering of insulating bodies on each ODU connector. They are going left-to-right when viewed from the outside of the enclosure

dcstraney commented 1 year ago

Created first-pass boards as of efbc150