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Handheld Digital Altimeter

Instrumentation & Measurement Solutions -
Handheld Digital Altimeter

Handheld digital altimeters are portable devices that measure altitude based on the change of atmospheric pressure. However, a variety of additional features such as clock, atmospheric pressure, compass and weather information (temperature, humidity etc.) can usually be implemented within a single device. This combination makes it an ideal choice for mountaineers, hikers, adventure enthusiasts and search & rescue staff working in the field.

A handheld digital altimeter is composed of sensors, signal conditioning circuit, ADCs, MCU, human-machine interface, and power supply. The sensors used in a single device may include barometric sensor, magnetic sensor, temperature sensor and humidity sensor. These sensors typically provide analog output, and therefore a signal conditioning circuit (of which amplifiers are the core components) is required to implement amplification and filtering of sensors’ small signals. The processed signals are then converted into digital signals by ADCs so that MCU can calculate based on digital input and certain algorithm to get results of altitude, atmospheric pressure, temperature, humidity, etc. The human-machine interface on a handheld digital altimeter includes several functional pushbuttons and a display for showing information. The power supply consists of battery, power management and battery management. The power management is used to convert battery power into different voltages to satisfy different requirements. The battery management provides control and protection during battery charge process.

In order to ensure that the handheld digital altimeters have a small size and capability of working properly for a long life even in harsh environment, the components with high integration, low power, wide temperature range and small package, and a large-capacity rechargeable battery that can work in a wide range of temperature should be selected. Meanwhile, the approaches that can reduce system’s power consumption should be adopted as many as possible during system design.

 

 

 

 

Application Notes

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ManufacturerProduct TypeAN TitleAN NumberPart NumberURL
WHITE PAPERS
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EVALUATION KITS
FREESCALE SEMICONDUCTORMCUS08LL Demonstration Board DEMO9S08LL16DEMO9S08LL16MC9S08LL16Click Here
FREESCALE SEMICONDUCTORMCUTWR-S08LL64 Tower System 8-bit Segment LCD Module TWR-S08LL64-KITTWR-S08LL64-KITMC9S08LL64Click Here
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FREESCALE SEMICONDUCTORMCUDEMOJM Lab Supplement for the 8-bit FlexisTm JM60DEMO9S08JM60MC9S08JM60Click Here
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MICROCHIPMCUMPLAB Starter Kit for PIC18F MCUDM180021DM180021PIC18FClick Here
MICROCHIPMCUPIC18 Explorer Board  DV164136DV164136PIC18FClick Here
MICROCHIPMCUExplorer 16 Development BoardDM240001DM240001PIC24FClick Here
MICROCHIPMCUExplorer 16 Starter KitDV164033DV164033PIC24FClick Here
MICROCHIPMCUMPLAB Starter Kit for PIC24FDM240011DM240011PIC24FClick Here
MICROCHIPMCUXLP 16-bit Development Board  DM240311DM240311PIC24F16KA102 Click Here
MICROCHIPMCUPICDEM LCD 2 Demonstration Kit User's Guide DM163030DM163030PIC18F85J90-I/PTPIC18F85J90-I/PTClick Here
MICROCHIPMCUPICDEMTm 4 Demonstration BoardDM163014DM163014PIC18F1320Click Here
MICROCHIPMCUPIC16F1937 Plug-in Module for PICDEM PIC18 Explorer BoardMA160012MA160012PIC16F1937Click Here
MICROCHIPTemperature SensorMCP9700 Temperature-to-Voltage Converter PICtail? Demo Board MCP9700DM-PCTLMCP9700DM-PCTLMCP9700 Click Here
MICROCHIPTemperature SensorMCP9700 Thermistor Demo Board User’s Guide MCP9700DM-TH1MCP9700DM-TH1MCP9700 Click Here
TEXAS INSTRUMENTS MCUMSP430FG4618/F2013 Experimenter Board MSP-EXP430FG4618MSP-EXP430FG4618MSP430FG4618Click Here
TEXAS INSTRUMENTS ADCADS1115 Performance Demonstration Kit ADS1115EVM-PDKADS1115EVM-PDKADS1115Click Here
NATIONAL SEMICONDUCTOR SensorSensor AFE Digital Controller BoardLMP90100EB/NOPBLMP90100EB/NOPBLMP90100Click Here
BOSCHPressure sensorBMP085-0330SBO008BMP085-0330SBO008 - Daughter BoardBMP085-0330SBO008BMP085-0330SBO008BMP085-0330SBO008BMP085-0330SBO008Click Here
SENSIRIONHumidity and Temperature SensorEvaluation Kit EK-H2 for Humidity Sensors SHTxxEK-H2SHT75Click Here
SENSIRIONHumidity and Temperature SensorEvaluation Kit EK-H4 for Humidity Sensors SHTxxEK-H4SHT75Click Here
OLIMEXMCUMSP430-449STK2MSP430-449STK2MSP430-449STK2MSP430-449STK2MSP430-449STK2MSP430-449STK2Click Here
OLIMEXMCUHEADER FOR MSP430F449 MSP430-H449MSP430-H449MSP430-449STK2MSP430-449STK2Click Here
HONEYWELL S&CCompass sensorSENSOR, DIGITAL IC COMPASS, DEMOHMC5843-DEMOHMC5843-DEMOHMC5843Click Here
HONEYWELL S&CCompass sensorSENSOR, DIGITAL IC COMPASS, EVALHMC5843-EVALHMC5843-EVALHMC5843Click Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMR3400HMR3400HMR3400HMR3400Click Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMR2300-D21-232HMR2300Click Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMR3000-D00-485HMR3000-D00-485HMR3000Click Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMC2003HMC2003HMC2003HMC2003Click Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMC5883L-DEMOHMC5883L-DEMOHMC5883LClick Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMC5883L-EVALHMC5883L-EVALHMC5883LClick Here
HONEYWELL S&CCompass sensorMagnetic Sensor ModuleHMR3500HMR3500Click Here
ManufacturerProduct TypeEvaluation Kits TitleEVKs Part NumberPart NumberURL

 

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FREESCALE SEMICONDUCTORSensorFreescale APEX (altitude pressure experimental design)MPL115AClick Here
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