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Comprehensive Review of GPS Location Saving System Hardware

This hardware review covers the WWU Taylor Reijm GPS Location Saving System with an NXP LPC2378 ARM7 MCU, detailed schematic, Flash Memory, power supply circuitry, and TFT LCD controller. It includes components like IRFZ44N, ATPS006A0X Pico TLynx DC-DC module, TFT LCD with touch screen, GPS Receiver EM-406A, and more.

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Comprehensive Review of GPS Location Saving System Hardware

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  1. GPS Location Saving System Hardware Review WWU Taylor Reijm

  2. GPS Location Saving System Full Schematic

  3. NXP LPC2378 ARM7 MCU LPC2378 32-bit MCU 512kB Flash Memory 144-pin 20MHz oscillator Used to control TFT touch screen LCD and LCD controller. 1 GPIO used for automatic power off circuitry RXD3 and TXD3 used to interface with GPS Receiver.

  4. Power Supply Circuitry 7.2V NiMH battery with 3000mA hrs. IRFZ44N VGS=2Vto start conduction. VGS=0V to end conduction. GPIO and SW2 used to control conduction ATPS006A0X Pico TLynx DC-DC switching power module. • Fixed Switching Frequency • Remote On/Off • 4.5Vdc-14Vdc • 6A Trim resistance used to get output of 5V • RTRIM=[5.91/(Vo -0.591)]k ohms • RTRIM(5V)=1.34k ohms • NCP1117 • 18V max in • 3.3V out • 800mA output current

  5. TFT LCD and Controller ADS7843- Touch screen controller 12 bit ADC with synchronous serial interface Comes connected as shown from Gravitech ELT240320TP-TFT LCD Thin Film Transistor Touch screen interface 2.8” screen 240x320 pixels. Backlight control Cap Sense O/P

  6. Reset Circuitry Active low reset

  7. Oscillator and EEPROM Oscillator 20MHz oscillator with enable tied to 3.3V supply EEPROM 8kB I2C interface w/LPC2378

  8. GPS Receiver EM-406A • 4800 baud NMEA 0183 output • 4.5V~6.5V DC input supply • ~44mA • O/P voltage level 0V to 2.85V • One Pulse Per Second not used.

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