ON Semiconductor recently announced the availability of a new Wearable Development Kit (WDK1.0). The kit comprises the following: a touchscreen display; wired and AirFuel-compatible wireless charging capability; a six-axis motion sensor and temperature sensor; an alarm, timer, and stopwatch; schematics; firmware and sample code; a dock station for charging; and a downloadable SmartApp for evaluating and controlling the smartwatches multiple functions.
The WDK1.0’s features, specs, and benefits:
NCP6915 power Management IC provides five LDOs and one DC-DC
NCP1855 battery charger IC, an LC709203F fuel gauge, and a 10-W rated SCY1751 wireless charging front-end controller
MEMS-based FIS1100 IMU, with three‐axis gyroscope and three‐axis accelerometer operation for multidimensional motion tracking
Embedded temperature sensor included and an LC898301 driver IC for initiating haptic feedback
nRF52832 multi-protocol system-on-chip (SoC)
1.44″ 128 × 128 pixel TFT display with a capacitive touch screen
The NavRanger-OEM combines a 20,000 samples per second laser range finder with a nine-axis inertial measurement unit (IMU) on a single 3“ × 6“ (7.7 × 15.3 cm) circuit board. The board features I/O resources and processing capability for application-specific control solutions.
The NavRanger‘s laser range finder measures the time of flight of a short light pulse from an IR laser. The time to digital converter has a 65-ps resolution (i.e., approximately 1 cm). The Class 1M laser has a 10-ns pulse width, a 0.8 mW average power, and a 9° × 25° divergence without optics. The detector comprises an avalanche photo diode with a two-point variable-gain amplifier and variable threshold digitizer. These features enable a 10-cm × 10-cm piece of white paper to be detected at 30 m with a laser collimator and 25-mm receiver optics.
The range finder includes I/O to build a robot or scan a solution. The wide range 9-to-28-V input supply voltage enables operation in 12- and 24-V battery environments. The NavRanger‘s IMU is an InvenSense nine-axis MPU-9150, which combines an accelerometer, a gyroscope, and a magnetometer on one chip. A 32-bit Freescale ColdFire MCF52255 microcontroller provides the processing the power and additional I/O. USB and CAN buses provide the board’s high-speed interfaces. The board also has connectors and power to mount a Digi International XBee wireless module and a TTL GPS.
The board comes with embedded software and a client application that runs on a Windows PC or Mac OS X. It also includes modifiable source code for the embedded and client applications. The NavRanger-OEM costs $495.