#Goal

- Finalize the T‑MECH PRO v2.2 design for a 100x60 mm Z‑57 enclosure by implementing a split CONTROL/POWER board configuration with specific interconnects, sensors, protection circuitry, and layout constraints as detailed in the query.

#Implementation plan

1. Schematic Modifications:

1. Partition the schematic into CONTROL and POWER sections with a 10 mm isolation gap.

2. Add a J7/J8 6‑pin interconnect with designated pins: +5V, 3.3V, GND, PWM_SIG, AMPS_SENSE, and VOLTS_SENSE.

3. Integrate an ACS712 header in series with LOAD_NEG, routing its output to GPIO3.

4. Insert a voltage divider using 20k and 3.3k resistors connected to GPIO1.

5. Add a 10k NTC connected to GPIO2.

6. Implement reverse polarity protection at J4 with a 10A10 diode in series with a TVS diode (1.5KE18CA).

7. Place a flyback diode across J5 ensuring correct orientation (cathode to coil positive, anode to load).

8. Add an active buzzer on GPIO10 and a PWM status LED.

9. Replace R4 with a THT axial footprint.

2. Net and Connection Constraints:

1. Enforce a minimum trace width of 5.0 mm on power nets and 0.8 mm on signal nets.

2. Establish the star ground connection at C1(−) only.

3. PCB Layout Adjustments:

1. Set the PCB board size to 100x60 mm.

2. Create a 10 mm isolation gap between the CONTROL and POWER board sections.

3. Configure the layout for bottom‑layer routing only.

4. Position connectors J4 and J5 along the bottom edge.

5. Integrate four 3.2 mm mounting holes with 4 mm offsets.

4. Verification and Finalization:

1. Run ERC/DRC to ensure separation of nets and correct voltage assignments to avoid shorts and meet design rules.

2. Verify that all specific interconnects, sensor inputs, and protection components are properly routed and connected.

3. Confirm that the star ground is exclusively connected at C1(−) and that the layout meets the defined constraints.

#Success criteria

- The schematic contains a split CONTROL/POWER layout with a 10 mm isolation gap and includes all designated interconnects and sensor inputs.

- The PCB layout is set to 100x60 mm with bottom‑layer routing, proper mounting hole placement, and designated positions for J4/J5.

- Power nets have a 5.0 mm trace width and signal nets have a 0.8 mm trace width.

- Reverse polarity protection, flyback, buzzer, PWM LED, and THT axial R4 have been correctly implemented and verified via ERC/DRC.