Messages

1

User Projects / Code Examples / Re: Powering the TinyDuino

« on: April 01, 2014, 05:37:29 PM »

Add up each of your requirements for current.  For example, your 4 motors at 18ma each come to 72ma.  Once you get a total then decide long you want to run the device before the batteries run down.  That will give you your minimum milliamphour rating.  LiPo's in all sizes, capacity and shapes along with chargers and connectors are available at most any hobby story.

2

TinyDuino Processors & TinyShields / Re: GPS Accuracy

« on: March 31, 2014, 06:44:18 PM »

I just downloaded the spec sheet for the Jupiter GPS chip that is used on the shield and it's claiming an accuracy of within +- 2.5 meters so something else must be going on.  Perhaps its the way Google Earth converts the nmea file.  I laid down a track this morning that was about 8-9 miles in length and the Google Earth shows the track as being 200-400 feet off the entire distance.

3

TinyDuino Processors & TinyShields / GPS Accuracy

« on: March 31, 2014, 04:35:42 PM »

I just built the Cat Tracker using the GPS tiny shield.  This morning I put it on the dash of my car as I drove to work and then uploaded the file to Google Earth.  The track appears to be consistently off by about 1/2 block from the streets that I drove on.  I have the GPS shield on the top of my stack and it was forward on the dash with a clear view of the sky.  Is this shield that inaccurate or did I do something wrong?