產品說明0
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Seeed原廠 Grove - Step Counter 步數計數器 (BMA456) (101020583)
Description
The Grove - Step Counter(BMA456) is based on BMA456, which is an exetremely small, triaxial, low-g high performance accelerations module. Thanks to the special algorithm of BOSCH, we made this module a portable pedometer.
Relaiable, cost-effective, on top of that, it's very easy to use, you can easily add this plug and play module on your wearable devices.
Features
- On chip FIFO
- Ultra-low power
- On-chip interrupt
- Programable functionality
Typical Application
- Applications with height constrains
- Plug and Play Step-Counter solution with watermark functionality
- Fitness applications / Activity Tracking
- Power management for wearable applications
- Display on/off and profile switching
- User interface without hardware buttons
- E-compass tilt compensation and data synchronization
- High performance angle measurements
Pin Out
Schemaitc
Power
The typical voltage of BMA456 is 1.8V, so we use the XC6206P182MR chip to provide a stable 1.8V. The input of XC6206P33 ranges from 1.8V to 6.0V, so you can use this module with your Arduino both in 3.3V and 5V.
Bi-directional level shifter circuit
This is a typical Bi-directional level shifter circuit to connect two different voltage section of an I2C bus. The I2C bus of this sensor use 3.3V, if the I2C bus of the Arduino use 5V, this circuit will be needed. In the schematic above, Q6 and Q5 are N-Channel MOSFET 2N7002A, which act as a bidirectional switch. In order to better understand this part, you can refer to the AN10441
Technical Details
| Dimensions | 40mm x 20mm x 7mm |
| Weight | G.W 9.20g |
| Battery | Exclude |
| Operating Voltage | 3.3V / 5V |
| Acceleration Range | ±2g, ±4g, ±8g, ±16g |
| Sensitivity | 16384 @±2g 8192 @±4g 4096 @±8g 2048 @±16g |
| Interface | I2C |
| I2C Address | 0x19(default) / 0x18(optional) |
Part List
| Grove - Step Counter(BMA456) | 1 |
| Grove Cable | 1 |
ECCN/HTS
| ECCN | 7A994 |
| HSCODE | 9029900000 |
