Comments on: Scratch-built GPS

By: chris

chris — Sun, 25 May 2008 21:54:11 +0000

hi i wanna built a gps receiver that is able to operate without a simcard is that possible?if so how can i do it?

By: Carl Holmberg

Carl Holmberg — Thu, 01 Nov 2007 03:05:14 +0000

This article is a GPS hack, not a scratch-built gps. THIS is a scratch-built gps: http://www.hackaday.com/2007/10/04/build-your-own-gps-and-glonass-receiver/

By: Donna Johnson

Donna Johnson — Tue, 30 Oct 2007 01:18:38 +0000

Hey is there any documentation on this project that you would be willing to send me?

By: subhashish mondal

subhashish mondal — Thu, 17 May 2007 11:12:36 +0000

i ma really impressed to see this sort of appliation being developed.what i want is how to interface a gps receiver to pic microcontroller so that the NMEA messages can be decoded and displayed on to the lcd .i want these longitudes and latitudes to be stored to the external memory connected to the pic which can be later on seen via uploading it to the pc.please help me with the codes in C.and how to proceed.thanking you
my mail id is
subhashish_mondal@yahoo.com
subhashishmondal@gmail.com

By: sara

sara — Sun, 06 Aug 2006 11:39:57 +0000

I am in a hurry .
If you can please answer me sooner!

By: sara

sara — Tue, 01 Aug 2006 23:33:33 +0000

Hi,
How are you?
I connected Gps (GM-R500) to AVR MCU and set the Buad rate in AVR to 4800.
I programmed AVR to show the “NMEA” sentences in LCD but the data that
i saw in LCD wasn’t correct.I don’t know why?
Should i use invertor between AVR and GPS?
How should i set the clock frequency in AVR MCU?
Please guide me in this project.
Thankyou
Regards,
sara

By: enrico

enrico — Tue, 25 Jul 2006 19:15:16 +0000

I don’t think you can turn off the GPS enabled on your phone if you cant do it through any of the system menus. You would either need specialized software blah blah. In any case, if someone REALLY wanted to find you, they can triangulate your location depending on what signal strength received from the different cell towers.

By: puppetboy denver co

puppetboy denver co — Mon, 19 Sep 2005 07:38:09 +0000

I want to know how I can turn the GPS off and on in my cell phone. The GPS info is not available to me. It is available to 911 ( and who knows who else ? ).

By: norman

norman — Sun, 11 Sep 2005 05:54:31 +0000

need help in finding a gps miniture to fit into a space 1 1/2″ wide by 3″ long, can you help me??? NOrman

By: norman

norman — Sun, 11 Sep 2005 05:43:43 +0000

Need a question answered please. I am looking for a miniture gps system that can fit into a 1 1/2″ wide x 3″ long MP3 player. does anyone have a miniture gps system or the plans to help me build on that will fit inside those dimensions???? {Please help} Thanks Norman

By: Christian white

Christian white — Tue, 06 Sep 2005 05:24:18 +0000

can someone tell me how to make a gps like device that i can use with ms streets software or something to use in the car that can tell me dir instead of spending 500 bucks for a machine made one

By: Funtime Bunny

Funtime Bunny — Tue, 06 Sep 2005 01:04:39 +0000

This guy built a GPS that uses uClinux and a LCD. Source and schematics are available too! No internal pics though, just some shots of the finished product.
http://www.labyrinth.net.au/~steve/gps/

By: furtim

furtim — Mon, 05 Sep 2005 03:13:46 +0000

“Receiver” has a very specific technical meaning. It refers to the receiving (hence the name) of signals of some kind and is usually (but not always) paired with demodulation of some kind. This, in addition with the mathematical post-processing to turn the demodulated signals into position fixes (the real hard part), is the “dirty work” you hand-wavingly dismissed.

This isn’t a peer-reviewed journal or anything, but some basic application of technical terminology would be nice. So what if the marketoids want to refer to something in a nice package a “receiver”? Guess what, those incorporate receiver functions. The guy in the link did not scratch-build a receiver, he’s displaying the output from one.

Even if you want to argue about the “receiver” terminology, the “scratch-built” part of the headline is dead wrong, since he bought the little black box to do all the “dirty work”, as you put it.

By: eliot phillips

eliot phillips — Sun, 04 Sep 2005 23:28:12 +0000

I don’t think I missrepresented this at all: he took module that does all the gps dirty work, programmed a controller to handle the output and drive a display. The only thing that’s been pointed out is that the symantics of GPS receivers leave much to be desired: http://froogle.google.com/froogle?q=gps+receiver

By: CDE

CDE — Sun, 04 Sep 2005 20:22:53 +0000

Someone else has a gps decoder built using one single chip, a pic:
http://www.ke4nyv.com/gpslcd.htm

Now, he just hasn’t shared the code for it. I bet someone else can make it from scratch like this. Hell, other then the resisters and crystal, you can get the pic and lcd (a nokia screen I mean) for free.

Now, get at it. I would like going geocaching today!…