by Publitek European Editors
This article looks at the options for getting started with a GPS design for industrial applications, from the transceivers to modules and the evaluation boards available, as well as the antenna issues to consider. It looks at how modules from suppliers such as Antenova and NXP Semiconductors can be used, extending to single chip implementations from Maxim and Skyworks.
Navigation and positioning are becoming increasingly popular functions in many devices, from dedicated satellite navigation handsets to integration in mobile phones and automobiles. They are now appearing in digital cameras and even used for tracking high value assets, making the integration of navigation technology an important design element. However, this brings together digital processing, software, analog and RF design expertise that may not be common within one company.
Getting Started with GPS - [Link]
Kevin Rye has been working on his GPS clock project and wrote a detailed explanation on his blog describing the build:
The great thing about setting the time and date via GPS is that I won’t have to put any buttons on the clock. It’ll set itself, and appear to be completely autonomous. By removing the buttons needed for entering menus and setting the time and date, I can hopefully make the clock that much smaller. Ideally, I don’t want it to be any bigger than the display itself. In addition, shaving a half inch or so off the PCB should save a few bucks when it comes to getting the PCB made.
GPS clock prototyping - [Link]
GPS modules from company Quectel have excellent features and enable a relatively quick development of applications also thanks to ready-made development kits.
GPS receivers are still more often used in various segments, what is also reflected in our offer of top-featured GPS modules from company Quectel. Naturally, it is ideal, when there´s also available a development kit for a given module. Really, development kits are the components, which significantly help at development and thanks to a simplified and accelerated development, this investment usually refunds very quickly. That´s why it´s possible to find in our offer development kits for almost every GPS or GSM/GPRS module from Quectel, moreover immediately available directly from our stock.
Do you want to know your position? - [Link]
j3tstream build this Teensy GPS logger:
Issue encountered: On the first board prototype i have mounted a PA6B without problem, when i powered up the pcb for the first time the GPS try to lock to satellite, in this case the 3d fix output should continuously output one-second high-level with one-second low-level signal, in theorical, regarding the data sheet, when the GPS is locked on the satellite, the output pin should continuously output low-level signal, but in my case, the output give me a high level signal, probably du to the firmware, so i decided to re-upgrade with the default factory firmware, the software, firmware, and guideline are available here. Be careful, the factory firmware set the baud rate to 9600bps, not 4800.
Teenlogger, a Teensy-based GPS logger - [Link]
Data logging GPS data on a SD card. Ktulu @ users.ininet.hu/ktulu writes:
Earlier this year I have bought on the flea market a used car GPS system, an Amstrad gp1000. (Un)fortunately it was so badly damaged, that it could not be repaired, so I thought I would reuse some parts from it. Then came the idea of building a portable GPS logger system.
The receiver runs perfectly from 3.3V, based on the NMEA V2. 2, 9600, 8, N, 1 protocol with a refresh rate of up to 1Hz and 16 channels. I’ve also reused the built in Li-polymer 1500mAh battery, some passive parts and connectors.
GPS to SD card data logger and compass - [Link]
The project presented here has come a long way already before becoming a kickstarter project. We developed the tracker for a pilot project at a company that was specifically looking for simplicity (both hardware and software wise), ease of use and cost while also being able to be manufactured in non-optimal conditions: even soldered and assembled by hand with minimal training or older equipment. These goals were met within the pilot project; prototypes were produced on a small scale and the project was an overall success.
Remote GPS Tracking - [Link]
L16 module supports system GPS, but also the Russian GLONASS, thus enabling to use almost a double amount of satellites for a better accuracy and higher accuracy even in urban conditions.
Quectel L16 based on Teseo II engine from STMicroelectronics, belongs to first modules supporting both navigation systems. What does it bring? – above all a substantially higher probability of a fast fixing (first fix) even in a dense build-up area or in other conditions inconvenient for reception of satellite signals. A possibility to use signal of both systems enables to increase localization accuracy up to approx. 1.5m. With 32 tracking channels and 2 fast acquisition channels, L16 can acquire and track any mix of GPS and GLONASS signals.
Thanks to the fact, that both systems operate at near frequencies, only one antenna is sufficient for reception. L16 supports passive and active antennas and the power supply voltage for an active antenna can be fed directly through the RF_IN pin. 3.3V voltage for an active antenna can be obtained by a simple interconnection of 2 pins (VCC_RF with V_ANT). In case, that you have an antenna requiring other voltage, you can connect an output of an external voltage source to the V_ANT pin.
Quectel L16 features all properties for successful utilization in praxis, and also small dimensions and an easily applicable SMT package. Detailed information will provide you the L16_HD_V1.1 datasheet, as well as L16_Glonass protocol description. For the development support, we also keep in stock the L16_EVBevaluation board. A detailed description can be found in the L16_EVB user guide.
Gain the development kit for free!
We offer you a possibility to gain the development kit with the L16 module for free. All that is necessary, is to correctly answer the question:
What enables L16 a fast acquisition (first fix) and a substantially more reliable and accurate position tracking?
Let us know the correct answer at email@example.com.
The winner will be drawn by lots within 14.12.2012.
Quectel L16 – a more exact localization with a double amount of satellites - [Link]
Bill shows the world’s smallest atomic clock and then describes how the first one made in the 1950s worked. He describes in detail the use of cesium vapor to create a feedback or control loop to control a quartz oscillator. He highlights the importance of atomic team by describing briefly how a GPS receiver uses four satellites to find its position. You can learn more about atomic clocks and the GPS system in the EngineerGuy team’s new book Eight Amazing Engineering Stories http://www.engineerguy.com/elements
How an atomic clock works, and its use in the global positioning system (GPS) - [Link]
The device is based on a GSM/GPRS module with included GPS. Its main function is to detect and communicate its own geographical position using, on the choice, the cellular phone reference system or the GPS. Its small dimensions are due to the use, for the first time, of a GSM/GPRS module integrating the GPS receiver. That is the SIM908 a recent product by SIMCOM.
The circuit of the localizer is build around two boards, one with the SIM908 on board and the second one including the microcontroller and the battery charger for the lithium battery. To get the GPS working will be necessary to complete the localizer circuit with an appropriate antenna.
GSM/GPS Localizer with SIM908 module - [Link]