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Background and Identification
The FanJu FJ3531 is an entry-level digital projection alarm clock manufactured by FanJu. It features a primary digital LCD screen displaying time, date, indoor temperature, and indoor humidity, complemented by an integrated 180-degree swiveling projection arm that projects time and outdoor/indoor temperature onto a wall or ceiling.
The clock offers dual alarm functionality, 4-level backlight brightness adjustments, and a built-in USB output port (5V/1A) for charging external mobile devices. It operates via an external DC 5V USB power input or 2 × AAA backup batteries.
Troubleshooting Page
Here is a link to the Troubleshooting Page for the FanJu FJ3531 Projection Alarm Clock: FanJu FJ3531 Repair and Troubleshooting
Device Specifications
- Battery: 2 × AAA 1.5V batteries (for memory/backup power)
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- Brand: FanJu
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- Colour: Black / Silver
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- Connectivity: RF wireless receiver (select RCC/DCF radio-controlled variants)
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- Connectors: 1 × DC 5V 1.2A power input port, 1 × USB Type-A output port (5V 1A power output)
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- Dimensions: 135.0 × 80.0 × 30.0 mm
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- Display: Monochrome Digital LCD with multi-level backlight
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- Graphics Card: Integrated
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- Miscellaneous: 180-degree rotatable red LED time/temperature projector, dual daily alarms, 5-minute snooze button, indoor hygrometer (20%–95% RH), indoor thermometer (-9.9°C to +50°C)
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- Operating System: Embedded Microcontroller Firmware
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- Processor: 8-bit Microcontroller Unit (MCU)
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- RAM Size: Integrated
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- Resolution: Segmented LCD
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- Screen Size: 3.0 "
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- Sensor: Digital indoor temperature sensor, digital humidity sensor
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- Storage: Integrated EEPROM
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- Weight: 280.0 g
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- Year of release: 2018
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Additional Information
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