NONDK BD3CS-588 SI4732 Full-Band Receiver Motherboard Kit BT5.0+-S3 WiFi 1.9inch Color Display Supports AM/FM/SW/RDS

Basic Usage Instructions: 1. Push the side power switch upward to turn on the radio. 2. Short- and hold the encoder (300ms): Switches between search mode (magnifying glass in the upper left corner) and frequency mode (+- and - icons in the upper left corner). In SSB mode, this enables BFO adjustment. 3. Long the encoder (700ms): Adjusts the volume. The main chip uses the SI4732 chip, supporting AM/FM/SW/RDS reception. The display module uses a 1.9-inch color TFT display with a 170 x 320 dot matrix, providing clear and natural colors. A new receiver op-amp circuit significantly improves sensitivity. Designed for compact portability and high sensitivity, this receiver the performance of high-end radios on the market, covering medium wave, short wave, and FM broadcasts, and also supports shortwave single-sideband reception. The main control module uses the --N16R8 WiFi + Bluetooth 5.0 wireless module, a dual-core IoT MCU module. 4. Single- the encoder: Switches to the band menu. 5. Double- the encoder: Sets the menu. 6. Triple- the encoder: Reads a stored station (auto-search is automatically turned off after reading a SSB station). 7. Quadruple-click the encoder: Calibrates the battery voltage. 8. and hold the encoder for more than 2 seconds: Soft-off/on. 9. and hold the encoder to power on: Clears all band settings and restores defaults. 10. and hold the encoder to adjust the volume. This function is easy to misuse and requires proficiency. Other issues: 1. Add aviation band (requires external down-conversion 100 inverter)