Compact USB-powered desktop CO₂ air quality monitor using an NDIR CO₂ sensor, microcontroller, OLED display, and visual good/moderate/poor status indication.
Compact USB-powered desktop CO₂ air quality monitor using an NDIR CO₂ sensor, microcontroller, OLED display, and visual good/moderate/poor status indication.
Compact USB-powered desktop CO₂ air quality monitor using an NDIR CO₂ sensor, microcontroller, OLED display, and visual good/moderate/poor status indication.
Compact USB-powered desktop CO₂ air quality monitor using an NDIR CO₂ sensor, microcontroller, OLED display, and visual good/moderate/poor status indication.
Compact USB-powered desktop CO₂ air quality monitor using an NDIR CO₂ sensor, microcontroller, OLED display, and visual good/moderate/poor status indication.
Compact USB-C powered desktop CO2 monitor using an RP2040, Sensirion SCD30 NDIR sensor, 3.3V I2C OLED header, and RGB air-quality indication, with native USB boot and SWD debug.
ESP32-based USB-C powered controller for four 5 V / 1 W heater strips, with PCB-mounted safety and ambient temperature sensing, OLED UI, rotary encoder, RGB status LED, and cost-conscious reliability/protection design.
Portable ESP32-S3 AI voice assistant development board with USB-C programming, LiPo charging, OLED, I2S microphone/amplifier, SPI flash, and microSD expansion.
Raspberry Pi Zero HAT-style PCB with bottom 40-pin GPIO header and top-side connectors for MLX90640 thermal camera, SCD41, PIR, IMU, OLED, and thermal sensor terminals.
ESP32 DevKit V1 sensor hub powered from a 12V barrel jack through an LM2596 5V buck converter, with gas, temperature, flame, thermal camera, OLED, relay outputs, buzzer, and ESP32-CAM connections.
Round Console X hardware control surface for the user’s self-developed Round Light Engine color grading software, based on Raspberry Pi Pico, OLED feedback, six encoders, three SPI optical trackball headers, MCP23017 expansion, and a one-sided PCB layout target.
Low-voltage control and power-control electronics for a 10-channel 220 V AC power sequencer using ESP32, shift registers, OLED display, and isolated/high-current AC sections to be added later.
Breadboard-only schematic for an ESP32-based LC electromagnetic response visualizer using a handmade coil oscillator, LM339 comparator, GPIO27 frequency input, SSD1306 I2C OLED, and calibration button. No PCB layout is included.
ESP32-based moss terrarium controller for constant temperature and humidity using 12V TEC/heater/LED/fan/mist drivers, SHT35 sensing, OLED UI, and protected 12V-to-5V-to-3.3V power architecture.
100 mm x 140 mm ESP32-based 18650 battery state-of-health analyzer prototyping board with active MOSFET discharge switching, current/voltage measurement, OLED UI, DS18B20 temperature input, and fan control.
ESP32-based universal inline analog signal conditioner with protected sensor input, DAC output, fail-safe NC relay passthrough, OLED UI, Bluetooth profile logic, and terminal-block I/O for automotive/bench use.
This circuit is an ultrasonic distance meter based on an ATTiny2313 microcontroller. It uses an HC-SR04 ultrasonic sensor to measure distance and displays the results on an OLED display. The power supply is constructed using a Boost converter (TPS613222A) and a 2-cell AA battery. Additionally, it also includes ISP for programming, RESET and START switches, and LED indicators. #project #Template #projectTemplate #ultrasonic #OLED #arduino #attiny2313 #TPS613222A #ISP #referenceDesign #simple-embedded #microchip #template #reference-design .
