Predictive monitor

KiCad 7/8 Project & PCB 3D Layout Specification

1. Overview

The Predictive Degradation Monitor PCB is an 80 x 60 mm, 2-layer FR-4 board (1.6 mm thickness, ENIG finish) designed according to the physical and electrical reference architecture:

• Primary Capacitor $C_1$ (Left): 1000 µF / 25V Low-ESR Radial Can (EEU-FR1E102).
• Backup Capacitor $C_2$ (Right): 1000 µF / 25V Low-ESR Radial Can (EEU-FR1E102).
• Linear Actuator / Servo Mechanism: Linear carriage with dual stainless steel guide rails and sliding contact wiper.
• Solid Brass T-Terminals: Left T-Terminal ($+\ -$) and Right T-Terminal ($-\ +$).
• Temperature Sensor: TO-92 NTC Thermistor (NTCLE100E3103JB0) with 0805 SMD bias network.

2. KiCad Project Files Structure

3. 3D Model & Mechanical Dimensions

   ┌─────────────────────────────────────────────────────────────┐
   │ (O) M3                                               M3 (O) │
   │                                                             │
   │    ┌──────┐           [ NTC Temp ]          ┌──────┐        │
   │    │  C1  │              [R1]               │  C2  │        │
   │    │(Left)│                                 │(Right│        │
   │    └──────┘      ┌──────────────────┐       └──────┘        │
   │      +  +        │  Servo/Actuator  │         -  +          │
   │                  └──────────────────┘                       │
   │        ═════════════════════════════════════════            │
   │        ─[ Left T ]────[ Slider ]────[ Right T ]─            │
   │        ═════════════════════════════════════════            │
   │                  <── Moves ~1 cm ──>                        │
   │ (O) M3                                               M3 (O) │
   └─────────────────────────────────────────────────────────────┘
                     ◄─────── 80 mm ───────►

3D Footprint Mappings

1. $C_1$ & $C_2$: Capacitor_THT.3dshapes/CP_Radial_D10.0mm_P5.00mm.wrl
2. $TH_1$ (NTC): Package_TO_SOT_THT.3dshapes/TO-92_Inline.wrl
3. $R_1$ (SMD 0805): Resistor_SMD.3dshapes/R_0805_2012Metric.wrl
4. $J_{ACT}$ (Servo Header): Connector_PinHeader_2.54mm.3dshapes/PinHeader_1x03_P2.54mm_Vertical.wrl
5. Mounting Holes (4x M3): MountingHole.3dshapes/MountingHole_3.2mm_M3_Pad_Via.wrl

4. Opening in KiCad

1. Open KiCad 7.0 / 8.0 / 9.0.
2. Click Open Project and choose pcb/predictive_monitor.kicad_pro.
3. Open the PCB Editor (predictive_monitor.kicad_pcb).
4. Press Alt + 3 or choose View -> 3D Viewer to view the photorealistic 3D CAD model rendering.
5. To export standard 3D files:
   • STEP Model: File -> Export -> STEP...
   • VRML / GLTF Model: File -> Export -> VRML... / kicad-cli pcb render