Shared Projects by PeskyProducts

Nordic Semiconductor’s low-power 2.4 GHz RF radio with pcb antenna and matching circuit per Nordic’s spec. Using much smaller XRCHA16MHz Murata crystal to reduce cost and board size.

Breakout board for Texas Instruments' eight-channel I2C multplexer allowing eight separate I2C devices to be controlled by a single host I2C bus. The breakout board accepts VIN from 1.65 to 5.5 V, the I2C lines all have 4K7 pull-up resistors, it has an active low reset (not broken out here but accessible via the resistor solder pad). The TCA9548A can have one of eight addresses so, in principle, up to eight of these boards could be ganged to control 64 separate I2C devices with one master I2C bus. This is particularly useful when using multiples of the same I2C sensor such as motion sensors or environmental sensors where the sensor device has a very limited (usually 2) range of I2C addresses. Added solder jumper to access two of the TCA9548A addresses so up to 16 I2C devices with the same I2C address can be managed with a single host I2C master bus using two of these boards.

LSM9DS0 9-axis motion sensor plus LPS25H pressure sensor with the SENtral EM7180 sensor fusion hub with M24512DFM EEPROM to store the SENtral configuration file. SENtral takes 9-axis accel/gyro/mag from LSM9DS0 and performs hardware sensor fusion returning raw data, quaternions, linear acceleration, and heading, etc. Breakout board using the SENtral with jumpers to take power from edge pins for breadboard use or to mount directly on the Teensy 3.1 for comparison between open-source software sensor fusion and the hardware sensor fusion provided by the SENtral. SENtral can act as master to LPS25H pressure sensor and in the future include the pressure data in the sensor fusion.

LSM9DS0 9-axis motion sensor plus MS5637 pressure sensor with the SENtral EM7180 sensor fusion hub with M24512DFM EEPROM to store the SENtral configuration file. SENtral takes 9-axis accel/gyro/mag from LSM9DS0 and performs hardware sensor fusion returning raw data, quaternions, linear acceleration, and heading, etc. Breakout board using the SENtral with jumpers to take power from edge pins for breadboard use or to mount directly on the Teensy 3.1 for comparison between open-source software sensor fusion and the hardware sensor fusion provided by the SENtral.

Bosch’s new BNO-055 9-axis motion sensor plus MS5637 pressure sensor. The BNO-055 has an embedded Cortex M0 ARM processor as well as accel/gyro and mag for a purely hardware absolute orientation solution. This is either a mini Teensy 3.1 shield or a conventional breakout board, choice is made via solder pads on back which bring 3V3 and GND out to edge pins. Sensor can be accessed either via I2C, UART, or HID-I2C on Windows 8 by changing solder pads PS0 and PS1 on back. Lastly, BNO-055 I2C address LSB can be changed via solder pad ADO so two can be on the same circuit, if desired. Added boot pin breakout.