The 5S heart rate sensor of LOXin Band is upgraded to use the latest scheme of silicon labs

Smart Band itself is not high in price and small in size, so it has become the central product of intelligent wear. Lexin focuses on medical and health electronic products and medical health platform technology. Happy heart Band 5S is upgraded from last year’s happy heart Band 5. How different will it be?

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

to configure

SOC: nrf52840 Low Power Bluetooth 5.0 chip

Screen: 0.96 inch TFT screen 160×80

Battery: 80mah

Features: IP68 waterproof, USB direct charging, 30 days of service life, heart rate monitoring

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

Dismantling

The Band is fixed by waterproof adhesive strips around, and the screen can be pried off by heating with hot air gun. The screen is connected with the motherboard through BTB interface, and there is waterproof glue around the screen.

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

The two shrapnel on the motherboard are connected with the antenna on the screen.

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

The inner support is fixed in the rear shell by a clip. The heart rate sensor, USB charging head and battery are connected through ZIF interface and the main board is welded with internal wires. The external lead of the battery is pasted with yellow insulating tape.

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

The internal support is fixed with the main board through a snap, and the battery and the motherboard are fixed by double-sided adhesive tape. There is an FPC antenna on the side of the main board, and the vibrator is directly welded to the main board.

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

The main IC on the front of the motherboard includes low-power Bluetooth 5.0 chip, sliding touch chip and 6-axis acceleration gyroscope. The marking diagram is as follows:

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

1: Nordic nrf52840 Low Power Bluetooth 5.0 chip

2: Azoteq IQs sliding touch chip

3: Stmicroelectronics-6-axis acceleration gyroscope

Finally, the heart rate sensor soft board is fixed on the back cover by double-sided adhesive tape.

乐心手环5s心率传感器再升级,使用Silicon Labs最新方案

After being disassembled, the whole Band is fixed by glue and clasp instead of screws. The heart rate sensor is upgraded compared with the previous generation, and the latest scheme of silicon labs company is used. There are few internal parts and less IC in the 5S. Please check the logic, memory, PM, RF, audio and MEMS chips used on the motherboard!