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46  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: February 02, 2013, 06:58:27 pm
The problem was that the arduino was on COM port 878 and the arduino software wasn't programmed well enough enough to figure that out. It didn't even notice that there was an issue and just assumed it was on COM 3. I had to clear the unused comports so that the arduino could be on a port it was capable of using, like COM 3.
47  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: February 01, 2013, 04:17:26 pm
I don't. Why can't that be done with a computer instead of a second arduino? Isn't there a way to wipe it clean and reinstall the bootloader or some other similar reset?
48  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: February 01, 2013, 03:29:16 pm
yea. I took the main chip out, put it into another device that uses arduino, it didn't work, then I put it back. So yea, there could be something wrong with the chip. The progream that was was last loaded onto it works fine though. It reads a pot and outputs the data. It passes the loopback test too. So, what's next to test? I have a scopemeter. What's next to test?
49  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: February 01, 2013, 09:21:34 am
It obviously works and passes the loopback test. What do I test next to get it to accept uploads?
50  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: February 01, 2013, 12:38:11 am
Binary sketch size: 2,806 bytes (of a 32,256 byte maximum)
C:\Users\Admin\Desktop\arduino-1.0.3\hardware/tools/avr/bin/avrdude -CC:\Users\Admin\Desktop\arduino-1.0.3\hardware/tools/avr/etc/avrdude.conf -v -v -v -v -patmega328p -carduino -P\\.\COM3 -b115200 -D -Uflash:w:C:\Users\Admin\AppData\Local\Temp\build2330982894507240071.tmp\test.cpp.hex:i

avrdude: Version 5.11, compiled on Sep  2 2011 at 19:38:36
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "C:\Users\Admin\Desktop\arduino-1.0.3\hardware/tools/avr/etc/avrdude.conf"

         Using Port                    : \\.\COM3
         Using Programmer              : arduino
         Overriding Baud Rate          : 115200
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Recv: 1 [31]
avrdude: stk500_getsync(): not in sync: resp=0x31
51  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: February 01, 2013, 12:31:00 am
I did the loopback test. I used serial monitor. It worked fine. I could see everything I typed returned back to me. What's next? When uploading a sketch, it just sites there at ~90%
52  Using Arduino / Installation & Troubleshooting / Re: Could upload before, now unloading a sketch doesn't complete. on: January 31, 2013, 09:29:59 am
I did.
The right port is selected.
The right board is selected.
Everything is unplugged from the board.
Drivers are fine because it worked before.

It clearly tries to upload as I can see rx tx blinking when I hit upload. It never finishes though and the old program remains. What do I test next?
53  Using Arduino / Installation & Troubleshooting / Could upload before, now unloading a sketch doesn't complete. on: January 30, 2013, 10:57:01 pm
arduino UNO. Arduino 1.0.3. The old sketch I have on the arduino works fine. It reads a pot and serial.prints the value. The problem is that I'm unable to upload a new sketch. The sketch compiles, begins to upload and then just sits there at about 80%. Never finishes. I have to unplug it or reset it. When I do, the old sketch is still there running. You can tell that it's trying to accept the new sketch bc the RX TX lights start blinking but then it TX light just stays solid and nothing happens.
54  Using Arduino / Project Guidance / Re: How do thermostats tell the central HVAC unit to turn on? on: January 29, 2013, 09:54:05 pm
this diagram is a little more clear: http://www.electrical-online.com/wp-content/uploads/2011/04/Thermostat-heat-cool-fan-on.jpg

It looks like either Rc or Rh need to connect to both G and Y
55  Using Arduino / Project Guidance / Re: How do thermostats tell the central HVAC unit to turn on? on: January 29, 2013, 09:29:16 pm
you would need some type of relay. The thermostat it self should just be turning the air on when it reaches a certain temperature.
Well I know that :p I want to know which two wires it connects together to activate the AC
56  Using Arduino / Project Guidance / How do thermostats tell the central HVAC unit to turn on? on: January 29, 2013, 08:39:44 pm
Are they just connecting two specific wires together when the temp limit is reached? Another way to say it is, if you wanted to make your central HVAC unit run in cool mode and you didn't have the thermostat but did have the wiring for it, how would you make it run?
57  Using Arduino / Project Guidance / Re: 2 loads not working together on the same battery on: January 16, 2013, 12:32:15 am
Thanks for your opinion. You're not able to help and you know it. I've got some new tips from people who understand the issue that I'm going to experiment with.
58  Using Arduino / Project Guidance / Re: 2 loads not working together on the same battery on: January 15, 2013, 11:26:21 pm
It's super simple. Just a car battery, a switch, a 3.5A power lock actuator, and a analog camera. That's it. The switch activates the power door lock actuator.

Don't forget to remind them that the ground wire for all this is a single conductor of a cat5 cable. sad.
it's irrelevant. I've tried a much shorter 18GA wire in place of it. Of course, I still get the same result because it's unrelated to the problem. Thanks for trying to 'help' though.
59  Using Arduino / Project Guidance / Re: 2 loads not working together on the same battery on: January 15, 2013, 10:14:15 pm
It's super simple. Just a car battery, a switch, a 3.5A power lock actuator, and a analog camera. That's it. The switch activates the power door lock actuator.
60  Using Arduino / General Electronics / Re: A few simple questions about inductors.. on: January 15, 2013, 09:48:13 pm
Well, an inductor has high impedance to high frequencies, but low impedance with low frequencies.
I understand you so far..

So without a resistor... well, never mind the graph.  Here's what the circuit would look like though:
I see that it burned up but I don't know why it burned up.

3. Could the first voltage spike be taken care of with a voltage regulator and the second with a diode, or would both be handled by the regulator?
You mean, reducing the first spike by limiting the current?  
No, on the voltage graph I see a large, positive spike in voltage. So just add a 12v regulator right after the inductor to limit it to 12v right?
The other spike is negative voltage. Well, a diode will stop that right?

Also, yeah.. and inductor and cap combo make a good isolator.  
Oh, that's the name for what I'm trying to build..

Another option is to feed the low-current section through a series resistor, with its own local supply cap.  This will make the battery a lower-resistance (therefore, more attractive) supply in comparison.  
I see. So you're making the battery the path of least resistance so that it doesn't suck the current and voltage from the camera. Won't the camera still be deprived of current though? As in, the current would be momentarily diverted to the the high amp load starving the low amp load when the high amp load is switched on?
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