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by RH314
Sun Jul 27, 2014 10:02 pm
Forum: General discussion
Topic: GPS/GLONASS module giveaway
Replies: 0
Views: 509

GPS/GLONASS module giveaway

For anyone needing GPS location capability and not concerned about higher 120mA acquisition current, this giveaway item might be of interest: http://goo.gl/qDGBAB
by RH314
Thu Jan 30, 2014 10:56 pm
Forum: Off topic discussion
Topic: Upgrad GPS in Raspberry Pi Projects to GPS/GLONASS?
Replies: 0
Views: 428

Upgrad GPS in Raspberry Pi Projects to GPS/GLONASS?

With iPhones already having GPS/GLONASS, this ~$20 GPS/GLONASS receiver board with user programmable feature seems interesting.

http://hackaday.com/2014/01/17/20-gpsgl ... -receiver/
by RH314
Thu Jan 30, 2014 10:42 pm
Forum: Python
Topic: reading GPS co-ordinates using Python in Raspberry Pi
Replies: 8
Views: 12065

Re: reading GPS co-ordinates using Python in Raspberry Pi

GPS modules typically have NMEA output mode and binary output mode. If shipped GPS module somehow inadvertently set into binary mode during production testing, it might result in the problem described. One way to sort it out is to connect the GPS module to a PC, use the GPS module evaluation program...
by RH314
Thu Jan 30, 2014 9:27 pm
Forum: Troubleshooting
Topic: [SOLVED] BMP085 - how to set altitude?
Replies: 45
Views: 11185

Re: [SOLVED] BMP085 - how to set altitude?

Barometer is accurate in determining altitude change, but needs calibration from time to time for determining absolute altitude. GPS altitude accuracy although less accurate than horizontal accuracy, it still provides some good absolute reference for altitude in the long term. Maybe it’s good to dev...
by RH314
Thu Jan 30, 2014 4:57 pm
Forum: General discussion
Topic: GPS ALTERNATIVE to Adafruit GPS Ultimate Breakout Board
Replies: 11
Views: 7186

Re: GPS ALTERNATIVE to Adafruit GPS Ultimate Breakout Board

Another interesting alternative is a 3.3V breadboard friendly $19 programmable GPS with 50MIPS + 490KByte Flash + 45KByte RAM for user program while running 10Hz GPS: http://bit.ly/1dBpits
by RH314
Thu Jan 30, 2014 4:20 pm
Forum: Other projects
Topic: GPS to work inside buildings
Replies: 7
Views: 2826

Re: GPS to work inside buildings

GPS repeater doesn't work in your case. The rebroadcasted GPS signal, when picked up by the indoor GPS will only give static position of the rebroadcast outdoor receiving GPS antenna location, assuming indoors has no line of sight signal from GPS and only rebroadcast signal is received. If you have ...
by RH314
Thu Jan 30, 2014 4:07 pm
Forum: HATs and other add-ons
Topic: GPS module for high-altitude, high speed?
Replies: 13
Views: 7841

Re: GPS module for high-altitude, high speed?

Commercial GPS receivers conform to COCOM limit, (altitude < 18km) and (speed < 515m/sec) cannot be simultaneously exceeded, either can be exceeded, for prevention of use in missile or ICBM. I’m not sure if there isn’t regulation prohibiting private individual from shooting rockets into space. If yo...
by RH314
Thu Jan 30, 2014 3:52 pm
Forum: Automation, sensing and robotics
Topic: Pi Based Tide clock/display
Replies: 16
Views: 4719

Re: Pi Based Tide clock/display

From below 2 links, it seems tide clocks can be implemented less complicated than what you are thinking without those external sensor interface.

http://www.ebay.com/bhp/tide-clock

http://en.wikipedia.org/wiki/Tide_clock

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