The SRF05 is an evolutionary step from the SRF04, and has been designed to increase flexibility, increase range, and to reduce costs still further. As such, the SRF05 is fully compatible with the SRF04. Range is increased from 3 meters to 4 meters. A new operating mode (tying the mode pin to ground) allows the SRF05 to use a single pin for both trigger and echo, thereby saving valuable pins on your controller. When the mode pin is left unconnected, the SRF05 operates with separate trigger and echo pins, like the SRF04. The SRF05 includes a small delay before the echo pulse to give slower controllers such as the Basic Stamp and Picaxe time to execute their pulse in commands

Usage： Supply module with 6-12V, the output will be 5V while obstacle in range, or 0V if not. The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules, Note : the module should be inserted in the circuit before been power, which avoid producing high level of misoperation ；if not, then power again.

4 pins Power supply: 5V DC Static current: 2mA Sensor angle: 15 to 35 degrees Sensing distance: 0.75in (2cm) to 13ft (4m) Precision: up to 0.04in (1.0mm)

The HDPMO1 is a dual-axis magnetic sensor, it is a complete sensing system with on-chip signal processing and integrated I2C bus, allowing the device to be connected directly to a microprocessor eliminating the need for A/D converters or timing resources. It can measure magnetic field with a full range of ±2 gausses and a sensitivity of 512counts/gauss @3.0 V at 25°C.

Magnetic fields and current go hand-in-hand. When current flows through a wire, a magnetic field is created. This is the basic principle behind electromagnets. This is also the principle used to measure magnetic fields with a magnetometer. The direction of Earth's magnetic fields affects the flow of electrons in the sensor, and those changes in current can be measured and calculated to derive a compass heading or other useful information

This new version adds 2 standoff holes as well as an extra decoupling capacitor. The ADXL345 is a small, thin, low power, 3-axis MEMS accelerometer with high resolution (13-bit) measurement at up to -16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. The ADXL345 is well suited to measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables measurement of inclination changes less than 1.0 degrees;.

SIM 28 ML is stand-alone or A-GPS receiver with build in LNA. SIM 28M can relax can relaxed antenna requirement and don't need for external LNA. Sim 28ML can track as low as -165 dbi signal even without network assistance.SIM 28ML has excellent low power consumption characteristics(acquisition 17mA, tracking 16 mA). Sim 28ML supports various location and navigation applications including autonomous GPS, QZSS,SBAS ranging(WASS, EGNOS, GAGAN, MSAS). DGPS and A-GPS.