Individual Assignment
Testing an embedded microcontroller system you designed
Summary
I exported my circuit design as an SVG and used ModsProject to generate G-code. The code was run in candle on CNC 3018 to mill the PCB. After soldering the components, I tested the circuit by programming the LED and LDR,
Plotting PCB
I clicked Plot and chose SVG as the file type. Then I selected the layers I needed Edge Cuts for the board shape and Front Copper for the circuit
After plotting, I select the files as SVG so they could be used in ModsProject
ModsProject
Next, I opened ModsProject, chose GCODE Mill 2D PCB, and imported the SVG file
chose invert to set the correct milling area
after, I went to Set PCB Defaults and picked Milly Trace. Then, in V-Bit Calculator, I set the tip diameter to 0.3 mm and the offset number to 4. After that, I sent these settings to Mill Raster 2D
next,I went to the Mill Raster 2D section and clicked Calculate. To generated the G-code, and downloaded
Milling PCB
I using a CNC 3018, I opened the candle and loaded the generated G-code. I then fixed the copper board into the CNC bed using double-sided tape.
I added double-sided tape to the copper board and fixed it firmly onto the CNC bed
final result of milling
After milling, I soldered the components into the pcb
PCB Testing
After soldering all components on the PCB, I wrote a simple program to light the LED to check if the PCB was working correctly
This is my test code for the PCB
#define LDR_PIN A0
#define LED_PIN D1
int threshold = 20;
void setup() {
pinMode(LED_PIN, OUTPUT);
Serial.begin(115200);
}
void loop() {
int lightValue = analogRead(LDR_PIN);
Serial.println(lightValue);
// DARK → LED ON
if (threshold > lightValue) {
digitalWrite(LED_PIN, HIGH);
} else {
digitalWrite(LED_PIN, LOW);
}
delay(300);
}
#define LDR_PIN A0
#define LED_PIN D1
int threshold = 20;
void setup() {
pinMode(LED_PIN, OUTPUT);
Serial.begin(115200);
}
void loop() {
int lightValue = analogRead(LDR_PIN);
Serial.println(lightValue);
// DARK → LED ON
if (threshold > lightValue) {
digitalWrite(LED_PIN, HIGH);
} else {
digitalWrite(LED_PIN, LOW);
}
delay(300);
}
After that, I completed the code.
Testing Outcome
The script successfully blinked the LED, confirming that the PCB is functioning correctly