Tools Required

• KiCad (for schematic and PCB design)
• Mods CE for toolpath generation
• CNC milling machine Wegstr Machining
• Double-sided PCB blank
• Soldering tools
• Multimeter etc

• Start a new project in KiCad

• Launch the Schematic Editor

• Add parts ( resistor, LED, button, 6-pin header)

My Objective

• Annotate schematic
• Assign footprints

• Perform ERC (Electrical Rules Check)

• Complete schematic with labeled components


2. KiCad PCB Layout Design

• Open PCB Editor

• Update PCB from schematic or import netlist


Final layout with board outline
DRC results

• Top copper trace export
• Outline layer export

• Load image (traces PNG)

• Select mill traces (1/64")

• Set cut depth: 0.1 mm, max depth: 0.1 mm, tool diameter: 0.4 mm
• Set origin (X=0, Y=0)

• Save the .rml or .nc file
• Repeat for cutout layer with mill outline (1/32")

• Mods CE interface with loaded image

• Toolpath preview for traces

• Toolpath preview for cutout

• Secure blank PCB on the CNC bed using tape

• PCB fixed on CNC bed
>
• Set X, Y, Z origins
• Run the traces toolpath


• Change bit and run cutout toolpath
• level the pcb board

• Milling in progress
• Final milled PCB board

• Now the circuit is ready

• Now the circuit got edgecut and the board is ready to assemble

• After the edge cutting process was completed, the PCB was carefully removed from the machine

• 1 × Custom Milled Copper PCB – Single-sided copper-clad board designed and fabricated using PCB milling.
• 1 × SMD Tactile Push Button Switch – Used as a user input switch for triggering functions or resetting the circuit.
• 4 × SMD Resistors – Used for current limiting, pull-up, or pull-down functions in the circuit.
• 1 × 4-Pin Female Header – Used for programming, communication, or external connections.
• 2 × 6-Pin Female Headers – Used for mounting and interfacing a microcontroller module or expansion board.
• Copper Traces – Milled conductive paths that electrically connect all components on the PCB.

PCB Assembly Description

The PCB was designed in KiCad and milled from a single-sided copper-clad board. The circuit consists of a tactile push button switch, four surface-mount resistors, and female header connectors for interfacing with external modules. The custom teddy-bear-shaped PCB was fabricated using a PCB milling machine and assembled through soldering of all electronic components. The headers provide a removable connection for a microcontroller board, while the push button acts as the primary user input device.

🔌 6. Solder the Components

• Use flux and tweezers for SMD soldering

• Test each connection with multimeter
• Optionally test ISP or UART communication

• Soldering in progress
• Fully assembled board

• Multimeter testing

• Connect with USB-to-UART or ISP programmer
• Burn bootloader or test blinking code
• Use terminal to check serial response (if available)

• Board connected to computer





























        
Terminal output (if serial used)
        
LED blinking Programming

        
ul class="code-steps"
          
// the setup function runs once when you press reset or power the board
          
void setup() {
 pinMode(2, OUTPUT);
 pinMode(3, OUTPUT);
}

          
// the loop function runs over and over again forever
          
void loop() {
 digitalWrite(2, HIGH); // turn the LED on
 digitalWrite(3, HIGH);

            delay(700);

 digitalWrite(2, LOW); // turn the LED off
 digitalWrite(3, LOW);
 delay(700);
}
          
      

Pcb Board engrave cutting ,Pcb Board outer cutting,Pcb g-code files download here

Summary Checklist for Documentation

Final Review

My Week 08 assignment demonstrates a complete Electronics Production workflow, starting from PCB design in KiCad, generating toolpaths in Mods CE, milling the PCB, soldering components, testing connections, and programming the board. The documentation clearly shows each manufacturing step with supporting images, including schematic creation, PCB layout, DRC/ERC verification, toolpath generation, PCB milling, assembly, and programming. The custom teddy-bear-shaped PCB adds creativity while maintaining functionality. The inclusion of downloadable design and manufacturing files further improves reproducibility and demonstrates good fabrication practice.

Conclusion