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 ESP32-S3 module, Sensirion NDIR CO₂ sensing, I²C OLED display, and RGB air-quality 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.

WeMos D1 Mini: LiPo Battery, OLED Display, and Debounced Button System (Final Schematic & Ready for Production)

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.

Two-board ESP32-C3 optical clip with USB-C LiPo charging, OLED display, red/IR LEDs, and remote phototransistor receiver.

ESP32-based DIY drone transmitter/controller with OLED display, dual joysticks, NRF24L01+PA+LNA radio, USB-C/2S LiPo power, charging, controls, indicators, and external interfaces.

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 .

Single-phase student energy meter using ATM90E26 metering IC, STM32F103 MCU, OLED display, USB-UART communication, transformer voltage sensing, and SCT013 current sensing. Designed for a 2-layer PCB within 150 mm x 150 mm and a BOM target below 50 EUR.

This is a smart watch project based on E73-2G4M04S1A module with SoC nRF52810 on board. OLED display and coin battery #wearable #nRF52810 #E73 #Ebyte #BLE #referenceDesign

Arduino-based vibration sensor module with SSD1306 OLED display for real-time vibration readings

This project is a WiFi RF-ID Lock, which uses a Espressif ESP-8684 microcontroller for WiFi connectivity and a Handson Technology RC522 for RF-ID functionality. It also includes an OLED display and user control via a switch. A step-up power converter ensures consistent 3.3V power. #WiFi #MCU #ReferenceDesign #project #ESP8684 #lock #OLED #referenceDesign #simple-embedded #espressif #template #reference-design

Children’s Color Vision Screening Game using ESP32, TCS3200 Sensor, and OLED Display

Project Title: Plant Monitoring and Irrigation System Overview: This system is based on the ESP32-S3 and is designed to manage irrigation for a multi-floor building. Key Features: Multi-Floor Operation: The system controls three separate floors. Each floor's irrigation can be managed independently. Irrigation and Pump Control: Each floor uses a solenoid valve to regulate water flow. The solenoid valves are operated via MOSFETs. A relay engages an AC water pump when a MOSFET triggers a solenoid valve. Hardware Interconnects: Screw Terminal connectors are added for connecting the solenoid valves and the motor pump. A DC Jack is included to supply power to the system. User Interface & Connectivity: Two JST connectors are provided for integrating an OLED display, a rotary encoder, and a pushbutton. Future enhancements may include the addition of soil moisture sensors. Remote Control: The system is designed for future integration with Blynk IoT. Blynk IoT will offer both manual control and timer-based irrigation modes for each floor.

This is an Energy Meter project leveraging an ATTiny85 microcontroller (U1) to sense current through an ACS712 module (U2). It displays the data in real-time on an OLED display (OLED1) and interacts with three buttons (NEXT, MENU, OK). This compact energy meter is suitable for edge computing and low-power Internet of Things (IoT) applications #project #keypad #arduino #attiny85 #ISP #referenceDesign #edge-computing #edgeComputing #microchip #template #reference-design

This project is a WiFi RF-ID Lock, which uses a Espressif ESP-8684 microcontroller for WiFi connectivity and a Handson Technology RC522 for RF-ID functionality. It also includes an OLED display and user control via a switch. A step-up power converter ensures consistent 3.3V power. #WiFi #MCU #ReferenceDesign #project #ESP8684 #lock #OLED #referenceDesign #simple-embedded #espressif #template #reference-design

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

This project is a WiFi RF-ID Lock, which uses a Espressif ESP-8684 microcontroller for WiFi connectivity and a Handson Technology RC522 for RF-ID functionality. It also includes an OLED display and user control via a switch. A step-up power converter ensures consistent 3.3V power. #WiFi #MCU #ReferenceDesign #project #ESP8684 #lock #OLED #referenceDesign #simple-embedded #espressif #template #reference-design

This is a smart watch project based on E73-2G4M04S1A module with SoC nRF52810 on board. OLED display and coin battery #wearable #nRF52810 #E73 #Ebyte #BLE #referenceDesign

Greenhouse controller with temperature and humidity control Input voltage 12v led voltage: 12v humidifier voltage: 5V Display: i2c 0.96 OLED display sensor: htu21d i2c

This module is a minimalist Arduino Watch design. Consisting of a Microchip ATTINY85-20SU microcontroller, an OLED display for visual output, two user buttons for interface, and a Li-ion Battery for power. The schematic also includes graphic user interface with ISP for programming and minimal passive components for functionality. #project #Template #projectTemplate #reusable #module #simple-embedded #microchip #arduino #sublayout

This module is a minimalist Arduino Watch design. Consisting of a Microchip ATTINY85-20SU microcontroller, an OLED display for visual output, two user buttons for interface, and a Li-ion Battery for power. The schematic also includes graphic user interface with ISP for programming and minimal passive components for functionality. #project #Template #projectTemplate #reusable #module #simple-embedded #microchip #arduino #sublayout