Week 04

Electronics Design

Overview

Designing and documenting a simple I/O test board around the Seeed XIAO ESP32-S3 module. The circuit exposes one digital pin to a tactile switch and drives an LED (1206) through a series resistor (1206) for a blink / input demo. Files below include the KiCad project, Gerbers, and firmware sketch.

Download project files (.zip) · Browse files directory ↗

Gallery

KiCad PCB layout with XIAO ESP32-S3 module, switch, LED and resistor — .

KiCad schematic showing XIAO ESP32-S3, tactile switch to a GPIO, LED with series resistor to ground — .

Lab bench with oscilloscope and tools while testing the board — .

Using a multimeter to probe the milled board — .

D// Simple button → LED test const int LED_PIN = D1; const int BTN_PIN = D0; void setup() { Serial.begin(115200); pinMode(LED_PIN, OUTPUT); pinMode(BTN_PIN, INPUT_PULLUP); // button to GND } void loop() { int pressed = (digitalRead(BTN_PIN) == LOW); // active-low digitalWrite(LED_PIN, pressed ? HIGH : LOW); }