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1  Using Arduino / Project Guidance / Re: Controlling LED arrays - Not sure where to start on: August 15, 2014, 12:40:40 pm
This is good, but start from the overview page.

Also, their NeoPIxel guide is great.  NeoPixels has made controlling LEDs easy.
2  Using Arduino / Project Guidance / What is the fastest way to transfer data? on: July 16, 2014, 01:07:18 pm
What is the fastest way to transfer data between two arduinos?
3  Using Arduino / Project Guidance / Re: Powering a 5v circuit with car and backup lipo on: March 13, 2012, 09:58:58 am
So then this begs the question, what diode should I be using?  Actually, I am trying to figure out how to hook it up.  Don't I need a relay in there instead of a diode?
4  Using Arduino / Project Guidance / Re: Powering a 5v circuit with car and backup lipo on: March 11, 2012, 04:50:15 pm
Space is a concern.  But you just gave me an idea I can't believe I didn't think of.  A pocket bike battery is also lead acid.  This should be enough.

Thanks, your idea will work with that battery.
5  Using Arduino / Project Guidance / Re: Powering a 5v circuit with car and backup lipo on: March 09, 2012, 01:11:49 pm
So you are saying have the arduino be powered by which ever source and control which source is powering it?  That sounds like it could fail at some point and the arduino would need powered at all times.

Yes, I will have a master switch to shutoff the project.  I am hoping to keep the project component separate from the power, the power supplies (car and lipo) only supply power.

How about a little more detail.  The project will run off the lipo most of the time.  Most of the time I will just shut it off while the car is running (not legal to have this on while driving on public roads).  So while I am driving why not have the car charge the battery is what I am thinking.  However, if parked at a show and the car is running I figure why waste the lipo battery when the alternator is running also.

6  Using Arduino / Project Guidance / Powering a 5v circuit with car and backup lipo on: March 09, 2012, 11:47:06 am
I am going to need to power an arduino and several of these sparkfun led strips.  2 strips would almost be 4 amps.

I was thinking about using a Traxxis 7.4v 12800mAh R/C car battery.  Those can handle the large loads.  I am not an expert in power supplies.  I've been researching what I can do and I have hit a wall.  I would like the car power system to charge the battery while it is running and the project use the power from the car.  Then when the car isn't running to use the battery's power. 

i am not sure how to accomplish this.  I see some obstacles.  One, need to regulate the car voltage as it can spike.  Two, how to charge the battery while using the car power system.  I would obviously used a switched power line in the car, however, to protect form accidentally draining the car battery if it isn't running I could use a voltage switch that disconnects the car battery form my project.

My backup plan is to just have a single switch that when off the car power is connected to a charger to charge the lipo battery an the lipo is no powering the project. When on the switch will cut off the car's power system completely and connect the lipo to the project.  i would rather have an automatic way instead if possible.

I found this but I am not sure if that can be used for what I want.
7  Using Arduino / Project Guidance / Re: Rgb Led stip uniqe over time on: May 03, 2011, 04:20:57 pm

that as well.
8  Using Arduino / Installation & Troubleshooting / Re: avrdude: stk500_getsync(): not in sync: resp=0x0d on a mac on: February 24, 2011, 07:02:11 pm
Alright, I got the RBBB.  Same exact issue.  This means that somehow the Mac side is rejecting my FTDI cable.
9  Using Arduino / Installation & Troubleshooting / Re: avrdude: stk500_getsync(): not in sync: resp=0x0d on a mac on: February 24, 2011, 04:55:51 pm
Yes, I tried doing just a simple sketch.  Like I said, I uninstalled the arduino software and all extra libraries (in the documents fold on both mac and windows).  I then just tried the blink led sketch, on both windows and mac.  It uploads fine on windows, but on the mac side I get the error.

The GPS shield is not using pins 0 and 1 when it is on the arudino as I can upload fine on windows.

Yes, I did search.  But as you said it has come up a lot lately so there are a lot of searched to sift through.  None of what I read seems to be the appropriate answer.  Most are saying the cable/ftdi connection is bad or the wrong board was selected.  If either of those were the case it wouldn't work on the windows side.

So, the conclusion then is somehow the Mac side has decided to not like the FTDI cable anymore.  I have an RBBB arduino on the way, I will have to try with that when I get it.  I have this cable:

I did notice when double checking the board to select in the software the two Arduino Pro entries are the same description.  They both say the 128 version.  No 328 version listed.  I tried all possible 328 boards.  As I said, it worked a couple weeks ago but not now.  I don't remember what board was selected a couple weeks ago.
10  Using Arduino / Installation & Troubleshooting / Re: avrdude: stk500_getsync(): not in sync: resp=0x0d on a mac on: February 24, 2011, 03:10:14 pm

"new module" is new GPS module to replace the defective unit.  I bought the GPS shield and EM-406 GPS module form sparkfun.  The antenna wasn't working on the module I received.  The module was communicating with the arduino over serial but not getting a fix.  After talking to sparkfun support we found it was a defective GPS module.  So I had it replace.  I didn't change the code or install any new libraries for the Arduino. 

Obviously it worked on my Mac before I sent in the defective unit.  After hooking up the new unit I got that error.  I booted to the Windows side of my Mac and also using arduino 0022 it worked fine.  So it isn't the FTDI cable and it probably isn't the hardware.  Somehow the software changed.

I tried uninstalling the arduino software and removing any third party libraries I had.  I then reinstalled the arduino software and tried the basic blink led sketch.  I still got the error.
11  Using Arduino / Installation & Troubleshooting / avrdude: stk500_getsync(): not in sync: resp=0x0d on a mac on: February 23, 2011, 11:31:42 pm
I am confused.  A couple weeks ago I got an arduino pro 328 and the gps shield.  I am using arduino 0022.  It worked fine but the GPSr was defective.  I got the new module and now I get
avrdude: stk500_getsync(): not in sync: resp=0x0d
avrdude: stk500_recv(): programmer is not responding

I booted to windows and it works fine there.  Why would it fail in windows?
12  Using Arduino / Project Guidance / Re: Make a permanent project on: February 18, 2011, 01:14:14 pm
If you need a shield then it is kinda tough.  If you don't there are several options.  The RBBB mentioned before.  Maker Shed has something similar.

I use this for simple projects
13  Using Arduino / Project Guidance / Re: Using Arduino and Two GPS's on: February 17, 2011, 02:23:19 pm
How close is it going to follow? Would there be a delay?

On a good day GPS is accurate up to 12 feet.  On average with a day that isn't too cloudy with direct line of sight to the sky 15-20 feet is typical.

I wonder if some type of radio signal on the leader and a signal strength detector on on follower.  It would be like those automatic solar panels that use two photo sensors.  It keeps rotating until the sensors read the same amount to keep the panel looking directly at the sun.
14  Using Arduino / Storage / Re: Need read/write times for SD lib to be faster on: February 17, 2011, 02:19:33 pm
Does the SD card class make a difference or is it the hardware most Arduino users use?  Could we get full speed from a class 10 card?
15  Using Arduino / Networking, Protocols, and Devices / Re: dual serial communication problem (GSM + GPS) on: February 11, 2011, 04:31:30 pm
Thanks for the info.  I see two routes to take.  Cellular is one, the other is APRS and ham radio.

It isn't hard to get a ham radio license.  And it is a standard data format.  There are several sites you can use to track that data onto google maps.
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