LILYGO T-Circle 0.75-inch Round Screen Dev Board
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LILYGO T-Circle 0.75-inch Round Screen Dev Board
The LILYGO T-Circle is a powerful and compact round-screen development board designed for wearable devices, HMI interfaces, and IoT projects. It features a 0.75-inch 160×160 TFT LCD with capacitive touch, built-in APA102 RGB LED, and supports USB charging. Two versions are available: the T-Circle S3 based on the advanced ESP32-S3R8 with enhanced peripherals, and the T-Circle Classic, ideal for basic visual applications.
Available Versions
1. T-Circle S3 Version
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MCU: ESP32-S3R8 Dual-core LX7
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Wireless: 2.4 GHz Wi-Fi and Bluetooth 5 (LE)
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Flash: 16MB
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PSRAM: 8MB
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Display: 0.75-inch TFT LCD, 160×160 resolution, GC9D01N driver
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Touch: Capacitive (CST816D)
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Audio: I2S MEMS microphone (MSM261) and MAX98357A Class-D amplifier
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LED: RGB LED (APA102)
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Power: USB-C 5V/500mA charging
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Size: 32 × 17 mm
Best For: Voice interface projects, wearable displays, smart assistants
2. T-Circle Classic Version
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Display: 0.75-inch TFT LCD, 160×160, GC9D01N driver
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Touch Control: Capacitive touch (CST816D)
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MCU: ESP32 (classic)
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Basic GPIO pinout
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No built-in audio or amplifier modules
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Compact size with USB charging
Best For: Visual interface development, UI prototyping
Key Features
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0.75-inch round TFT LCD with 262K color and SPI interface
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GC9D01N display driver IC
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CST816D capacitive touch controller
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Fully compatible with Arduino, PlatformIO, and ESP-IDF
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Integrated APA102 RGB LED for visual feedback
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Expandable via Qwiic/STEMMA QT interface
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USB Type-C port for charging and communication
Application Scenarios
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Wearable device development
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Touch-based UI display projects
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Smart home control panels
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Voice-interactive IoT terminals
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Educational and embedded GUI demos
References
Effective Date: March 27, 2025
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