Arduino Uno MCP23017: Add 16 I2C GPIO Pins
Build an Arduino Uno MCP23017 I2C GPIO expander that adds 16 extra pins, then scale it into a DIN-rail industrial module using...
Arduino Nano TDS Sensor: Display Water PPM on OLED
Build an Arduino Nano TDS meter using a Gravity-style sensor module and SSD1306 OLED to display live water quality in PPM for...
Arduino Uno ST7789 Display: Run 240x240 Graphics Demo
Wire an Arduino Uno to a 1.3 inch ST7789 240x240 IPS TFT over SPI and run the Adafruit GFX demo to jumpstart...
ESP8266 ZMPT101B: True RMS AC Voltage Dashboard
Build an ESP8266 + ZMPT101B true-RMS AC voltmeter, calibrate it with intercept/slope, and publish live voltage to an MQTT dashboard with ShillehTek...
Arduino PZEM-004T: Fast AC Power and kWh Readings
Build an Arduino PZEM-004T AC energy monitor to stream voltage, current, power, frequency, power factor, and kWh fast over serial using ShillehTek...
ESP32 GC9A01: Build a Stereo Retro VU Meter
Build an ESP32 GC9A01 stereo retro VU meter with two round TFT dials, envelope follower input, and peak LEDs for smooth analog-style...
Arduino Nano DFPlayer Mini: OLED MP3 Player Build
Build an Arduino Nano MP3 player with a DFPlayer Mini (MP3-TF-16P) and SH1106 OLED menu UI, plus button controls and EEPROM-saved settings...
Arduino HC-12 + DHT11: Long-Range Telemetry Link
Build an Arduino Uno and Nano HC-12 telemetry link that sends DHT11 temperature and humidity to an I2C LCD base station with...
Arduino Uno AMG8833: Stream Thermal Heat Map to PC
Build an Arduino Uno or Nano AMG8833 thermal camera that streams an 8x8 heat map to a Windows PC with VirtualPanel interpolation,...
ESP8266 MH-Z19: Build a WiFi CO2 Monitor
Build an ESP8266 + MH-Z19 WiFi CO2 monitor that serves live readings to any browser and alerts with LED and buzzer when...
TTGO T-Beam LoRa GPS: Off-Grid Android Tracker
Build a TTGO T-Beam LoRa GPS tracker controlled from Android for live tracking, geofences, and logging without cellular service, using ShillehTek parts.
Arduino Nano SH1106 OLED: I2C Text Pages Demo
Build an Arduino Nano dashboard using a 1.3 inch SH1106 I2C OLED and U8glib to cycle clean text pages, with simple four-wire...