DATASHEET and Circuit Diagram

If you looking for a feature-rich power monitoring device that suits on a wide variety automotive, telecom, and industrial applications you may consider this LTC4151IC from Linear Technology. This power monitor device provides accurate voltage and current monitoring of positive supply rail from 7V to 80V through a simple I2C interface, according to the datasheet.

Such in automotive which has monitoring power in high transient environment, this device is suitable for that purpose as well the high input voltage of the LTC4151. You can see the above circuit schematic, it shows that the device monitoring up to 16A through a 5mOhms sense resistor at an accessory socket and feeding data via I2C microcontroller. And a portable GPS unit is used to illustrate the principle.

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If you need to look for a suitable transformer design for non-lead materials, a nonlead Piezoelectric Transformers, you may consider the folowing article that contain various transformer structures description. Piezoelectric transformers are now widely used in applications such as backlight inverters, AC-DC converters, car navigation system, LCDs for small screen devices and etc.

In the depth of the article there are informations about the piezoelectric transformer advantages, examples of transformer designs (Radial Transversal mode transformer, Longitudinal-Transversal mode transformer, Ring type transformer, and Unipoled transformer) including the schematic diagram of those transformers type.

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When it comes to very weak GPS signal that you’ve got, the position accuracy derived from GPS receiver might be  lower  than required. You will need to use an external sensors such accelerometers, gyroscopes, odometers, and etc to have anavailability and reliability of weak GPS signal. The following article describe you with the using of 3D MEMS accelerometer and one MEMS gyroscope which is integrated in a GPS based car navigation system.

According to the article, the major goal of setting up this system is bridge brief up to 30 seconds GPS outages, 5 Hz continuous and smooth delivery output of position, velocity and heading, filter out bad GPS position and velocity measurement. You will be taken then to the system configuration section that use ADXRS150 yaw rate gyro and SCA3000 3D accelerometer, MEMS sensor selection, the error model for accelerometers and gyro, the error model for GPS, Implementation of the Kalman Filter, System alignment and calibration, and Experimental System performance results.

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