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1  Using Arduino / General Electronics / Re: GPS: can you lock on to same Satellite? on: Today at 10:30:11 pm
thanks for the replies.

I was just wondering if this is possible. I don't have a GPS unit ready at hand, so while going through the sample codes, I was just curious.

Is it possible to have the GPS unit select an available satellite?

thank you
2  Using Arduino / General Electronics / GPS: can you lock on to same Satellite? on: Today at 06:17:20 pm
Hello everyone,
I was wondering if anyone has any idea if I can have multiple GPS unit connected to the same Satellites? Or if it is possible to choose the satellites available in view?

Thank You in advance.
3  Using Arduino / Project Guidance / Re: power 12v relay on: August 31, 2013, 10:16:00 pm
Got it fixed.
4  Using Arduino / Project Guidance / Re: power 12v relay on: August 31, 2013, 09:15:27 pm
Hi LarryD,
Am I suppose to see a voltage spike after the collector?
5  Using Arduino / Project Guidance / power 12v relay on: August 31, 2013, 09:05:54 pm
Hi everyone,
I am having some trouble powering my relay. can you guys let me know if this is correct?

thanks
6  Using Arduino / Project Guidance / Re: best way to keep arduino powered in car when car is off on: August 27, 2013, 11:50:01 pm
Sounds good, guys. I will give it a try tomorrow.

Thanks!
7  Using Arduino / Project Guidance / Re: best way to keep arduino powered in car when car is off on: August 27, 2013, 11:25:10 pm
what is Ahr and CCA? Sorry I'm not familiar with the abbreviations.
8  Using Arduino / Project Guidance / Re: best way to keep arduino powered in car when car is off on: August 27, 2013, 11:00:31 pm
I have a Honda Civic '96 Sedan. One example is to keep the device always on and implement a proximity sensor where it will trigger a reed relay to send the Horn on. Do you guys think it will be safe enough for me to wire a usb adapter directly to the batter terminals?
9  Using Arduino / Project Guidance / Re: best way to keep arduino powered in car when car is off on: August 27, 2013, 09:20:24 pm
Hello everyone.
Thank you all for your insightful replies. I am using an Uno R3. The reason I will need it to be on at all times is for security purposes. It's only going to draw enough to use the arudino normally through a usb. Any other high current will be trigger through the digital pins to a reed relay.

I guess my ultimate question is whether or not anyone has tried this before. And what I mean by this is hooking a 12v usb charger directly to the battery terminals. Is the cigarette lighter the same voltage and current as directly off the battery? I'm just not too sure on this one because I'm not too techy on cars. I'm just afraid of frying my usb charger.
10  Using Arduino / Project Guidance / best way to keep arduino powered in car when car is off on: August 27, 2013, 01:49:48 pm
Hi everyone,
Simply, this is what I'm looking to do.
1. Keep arduino always on even when car is off.

I have a 12v usb socket charger for my phone and I've been using that to power up my arduino. Can I connect this usb charger directly to the battery to keep my arudino on all the time? Will it drain my battery quickly? Or is there a better way to do it?

Thanks!
11  Using Arduino / Project Guidance / Re: reed relay switch on: May 19, 2013, 01:49:57 pm
Hi there Peter,
Here is what I want to do(please see attachment).
Should I get this reed relay instead for my need then? http://www.radioshack.com/product/index.jsp?productId=2062478&clickid=prod_cs
12  Using Arduino / Project Guidance / reed relay switch on: May 19, 2013, 12:50:59 pm
Hi Everyone,
I currently have this: http://www.radioshack.com/product/index.jsp?productId=2062479&clickid=prod_cs.
I want to run a 9v through the line, but i'm getting a very weak signal and probably because of the .5A line. Do you guys have any recommendation on a higher one that can handle about 12v through the line?

Thanks
13  Using Arduino / General Electronics / Re: powering with a 11v lipo battery on: May 17, 2013, 09:29:51 pm
how many amps should the fuse be at?
14  Using Arduino / Project Guidance / IR proximity on: May 17, 2013, 03:28:28 pm
Hi everyone,
I've been looking through all of the threads and tutorials online on how to make a simple IR proximity sensor, but I can't get it going. My numbers from the analogRead() does not change whatsoever. I would like to start out from scratch and try to see if you guys can guide me through it. Please help.

my IR/reciever:
http://www.radioshack.com/product/index.jsp?productId=2049723

My Materials:
1. IR emitter
2. IR receiver (2pin)
3. 1k-100k resistor
15  Using Arduino / General Electronics / Re: powering with a 11v lipo battery on: May 17, 2013, 03:25:03 pm
Hi retrolefty,
So if I have a 2 cell lipo around 7.4v, I can just connect directly to the Arduino power plug?
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