Thread: GPS receiver with external antenna?

Yes, whatever interface that is needed. Hopfully it does not mean AD converters and such.

From what I understand the DR algoritms and such are integrated in the receiver and all I have to do is to provide gyro signal in accurate format. Similar to your system that only needed an RS232 adapter (correct?)

But I am new to this and have not looked into specs in detail so please tell me if you see any hurdles.

Learnings something new every day :-)

So you've bought the $500 kit including DR module? What about the Murata gyro in your thread? Is that the part included in the kit? Getting confused on a higher level...

One way forward would be to get a EVK-5H-0 kit and build a small cpu system that takes the NMEA info from it and together with a gyro signal, tacho and direction and a clever algoritm generates standard NMEA traffic when there is no signal.

If there was such a thing as a USB gyro that algoritm could even run on the carputer.

Maybe its that USB device I should build? Algoritms available? Thread at franson

I see... I guess the Kalman filter adjusts for signal strength from gyro and tacho gain etc. so that calibration is unnessessary. Below a picture that says nothing to me, but a picture always increase interest :-)



I have googled "dead reckoning" and "kalman" and read wikipedia and realize that there is a lot of development spent in these algoritms and that it is not given away for free.

So I need a DR module and a receiver, but I still think €500 is to much.

So then there is the LEA-4R (USB) and the TIM-4R (UART). Unfortunately they do not contain the newest technology in the receiving department (? confirm?)

These module are €145 and require a gyro with ADC (SPI interface), some kind of dc/dc converter, battery battery-backup and temperature sensor, also SPI (what is temp used for?!). and everything has to go on a pcb with antenna connector, usb connector etc.

No Problem (why is the AEK-4R €350 extra?)

Is there again a mayor part I've forgotten about?

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The €500 kit also contains an Epson gyro, maybe the very same one I saw on ebay that was $60 including p&p from Malaysia!

I've just ordered the Lassen DR+GPS at £50 + p&p and the Epson XV-8100CB gyro at $50 + p&p. (notice currency) The gyro is listed in list of compatible devices, so I do not expect any surprices there.

The Lassen DR+GPS kit was too expensive for me at £500. But "Diamond Point" is kind enough to enclude some electronics in their documentation that will save me quite some time. If I had enough money not to care, I would buy the kit.

Thanks for all help so far.

I will post result when done, which will probably be in 2 months or so.