Project Status and Action Items
Worked for 1 min 27 sec
Done. I deleted
CN1 and moved U_MCU/Pico to the top of the board; it is now centered at about (10 mm, 88 mm) with its top edge just inside the board outline.Open item: the Pico was clamped at the board edge, so if you want more clearance from the top edge I can drop it slightly lower.
I need a power switch and some output LEDs
Thought for 5 sec
I’ll add a low-current front-panel power/enable switch rather than a high-current 12 V path switch, plus output/status LEDs with current-limiting resistors, then verify the schematic changes.
Worked for 1 min 54 sec
Added the power switch and output LEDs.
SW_PWR is a low-current front-panel switch that pulls Pico 3V3_EN to GND to turn logic off, and I added green indicators for BUS_12V and VOUT_19V5 with 4.7kΩ and 8.2kΩ series resistors.Open items:
- These are placed near the top/front-panel area but not routed yet.
- If you intended a true high-current input disconnect instead of a Pico enable switch, that needs a different switch/contactor architecture.
Route controls and verify
Use high-current switch
Route switch and LEDs
Add LED labels
Run design review
Refine this doc
Ask about this doc
Bellwether 70012-1111 Connector Creation Brief
Status
Creation brief for a custom Flux component/footprint. The supplied PDFs are not importable EDA library files, so the connector must be manually created from the package drawing / 2D drawing or imported later from a real EDA library file.
Source Files
- Product page: https://www.bellwether-corp.com/en/product/compare_show.aspx?num=1227&detail=4705
- Product specification: HPSU Conn.-PS-70012-001_3.pdf
- Package spec: HPSU Conn.-PK-70012-001_A.2.pdf
- 2D drawing: HPSU Conn.-SD-70012-001_B.pdf
Extracted Electrical / Mechanical Ratings
Verify against original PDFs before release:
- Series: Bellwether 70012 / 70019 power and signal edge-card connector.
- Application: large-current plus high-sequence signal card-edge connector.
- Pitch: 2.54 mm power contacts and 1.27 mm signal contacts.
- Power contact current rating: 9 A per pin.
- Signal contact current rating: 1.5 A per pin.
- Power-to-power voltage rating: 250 VAC RMS / DC.
- Signal-to-signal voltage rating: 30 VDC.
- Power-to-signal voltage rating: 400 VAC RMS / DC.
- Operating temperature: -40°C to +105°C.
- Storage temperature: -40°C to +105°C.
- Power contact resistance: 0.6 mΩ max, tested at 34 A DC per quad contact.
- Signal contact resistance: 25 mΩ max initial.
- Durability: 200 mating cycles.
- Maximum mating force: 81.6 N.
- Minimum unmating force: 14.4 N.
Required Symbol Content
Create the schematic symbol using functional pin groups, not anonymous pins:
- 12V power output contacts from PSU: grouped as VIN_12V / PSU_12V.
- Power return contacts: grouped as GND / PSU_RTN.
- PSU control/status/sense contacts: use names from the Dell D750E-S1 pinout once verified.
- Mechanical/shield/key pins: mark as mechanical or no-connect as appropriate.
Required Footprint Checks
Manually extract from the package and 2D drawings:
- Exact 70012-1111 pin count and contact ordering.
- Power vs signal contact positions.
- Through-hole / press-fit / solder-tail geometry.
- Mounting hole diameter and location.
- Board edge / insertion datum.
- Keying and polarization geometry.
- Keepout for PSU shell and guide features.
- Mechanical envelope and connector height.
- Recommended PCB thickness and mating card alignment.
Flux Import Requirement
If using automated import later, provide one of these instead of PDFs:
- KiCad:
.kicad_symplus.kicad_mod, optionally.step. - Altium:
.SchLibplus.PcbLib, optionally.step, or.IntLib. - Eagle:
.lbr.
Current Blocker
The connector cannot be safely added as a real schematic+PCB component until the exact footprint geometry and pin map are manually created or provided in an importable EDA format. Do not use a generic connector placeholder for layout because PSU mechanical alignment is critical.
Status
Source Files
Extracted Electrical / Mechanical Ratings
Required Symbol Content
Required Footprint Checks
Flux Import Requirement
Current Blocker
