Fixing Project Issues

flux

0:00

I can’t directly route or move PCB copper/parts for you (Flux tool limitation), but I can add schematic-level routing aids and set layout rules that often reduce DRC:
  • Add more GND/VBAT access points (extra test pads / stitching points) so the router has more legal attachment points.
  • Set a conservative stackup + trace/clearance defaults.
  • Ensure GND fill is enabled so you don’t get floating copper islands (then you re-fill after routing).
Right now DRC is still: 59 overlapping copper, 36 airwires, 12 floating copper (these require placement/routing edits or auto-layout).
Next I’m going to (1) add additional GND + VBAT test pads beyond TP_*1-3 and (2) set baseline layout rules for stackup/trace widths/clearances.
58 days

Added 6 components

0:06

Added 6x 1.25mm SMD Test Point as TP1, TP2, TP3, TP4, TP5, TP6

58 days

Updated labels for 6 component labels

0:02

Renamed TP1 to TP_GND4

Renamed TP2 to TP_GND5

Renamed TP3 to TP_GND6

Renamed TP4 to TP_GND7

Renamed TP5 to TP_VBAT4

Renamed TP6 to TP_VBAT5

58 days

Updated 2 connections

0:08

Connected TP_GND4:P1, TP_GND5:P1, TP_GND6:P1, TP_GND7:P1 to ^GND

Connected TP_VBAT4:P1, TP_VBAT5:P1 to ^VBAT

nets {

net GND = TP_GND4:P1, TP_GND7:P1, TP_GND6:P1, TP_GND5:P1;

net VBAT = TP_VBAT4:P1, TP_VBAT5:P1;

}

58 days

flux

0:00

Work done
Success criteria review
  • ❌ I cannot directly fix PCB overlapping copper, airwires, or floating copper because routing/placement edits and auto-routing must be triggered by you in the PCB editor. The pcb-layout workflow explicitly requires user-triggered Auto-Layout and airwire verification.
  • ✅ Added additional GND/VBAT points to help the router converge and to improve debug/test access.
Next steps
  • In PCB: place the new test pads near congestion and trigger Auto-Layout (routing). The pcb-layout process requires this step because I cannot route traces myself.
  • After that, I can re-run @review to confirm Airwires=0, then help you iterate on the remaining DRC items by interpreting each violation and suggesting specific move/keepout strategies.
58 days
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Sophisticated Beige Gadget Copter

Sophisticated Beige Gadget Copter thumbnail
Tiny MSR Card Reader - Always-On Battery Low Power, Encrypted Storage + Encrypted SMS

Properties

SIM800C VBAT bulk: add low-ESR bulk caps C5/C6 close to U1 VBAT pins. Voltage derating rule: operate at <=60% of r ated voltage (use >=10 V parts on 4.2 V max VBAT). Keep existing 0.1 uF, 2.2 uF, 10 uF network close to VBAT pins in parallel.

VBAT is an always-on battery rail (3.7V nominal) and is ERC-driven by PowerNet1. GND return via J1 Pin_2.

Yes - driven by PowerNet1 (Power Net Portal) at 3.7V

Always-on VBAT: J1 Pin_1 -> VBAT net -> U1(VBAT pins 34,35 + VDD_EXT), U2(VBAT + VDD + VDDA + VCAP_1), U3(VCC), IC1(VCC). GND return via J1 Pin_2 -> GND net. Legacy power gating removed (R3, C9 removed; no PWR_EN net).

2026-02-25: Removed load-switch remnants (R3, C9) and consolidated supply as always-on VBAT. Next: mark VBAT as driven supply (power flag / net type Power + Voltage property) and delete any leftover PWR_EN net/portals if present.

flowchart TD Bat["Battery"] --> Vbat["VBAT always on"] Vbat --> U1["SIM800C modem"] Vbat --> U2["STM32F423 MCU"] Vbat --> U3["ATECC608A secure element"] Vbat --> IC1["W25Q32 SPI flash"] U2 -->|UART| U1 U2 -->|I2C| U3 U2 -->|SPI| IC1 U2 --> Flow["Read card -> encrypt -> store"] U1 --> SmsIn["Incoming SMS cmd"] SmsIn --> U2 U2 --> SmsOut["Encrypt payload -> SMS send"] SmsOut --> U1

Pricing & Availability

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Qty 1

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$11.01–$11.84

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$13.29–$14.34

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$19.24–$19.24

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$16.51

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$1.04

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$10.52–$16.52

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