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316  Using Arduino / Project Guidance / Re: monitor 12 vdc automotive battery used to start backup generator on: May 04, 2013, 06:40:43 pm

Well, I did post the question as to whether I could use two batteries on my generator.  It was definitely nixed by the Generac Dealer/Installers  as a potential drain on the second battery if one battery fails.

I also submitted the question to Generac via email and am waiting on a reply.

I previously posted a link to Generac dealer discussion on this issue but it was probably deleted by the mods.

I know thats an issue with LiPo batteries (one cell discharges so rapidly into another that the heat can cause the pack to burst into flame), but I didn't think it would be a problem with lead-acid batteries. I have seen many vehicles (primarily diesels) that use two batteries in parallel for starting.
317  Community / Bar Sport / Re: should Compilers should be given personalities? on: May 04, 2013, 03:08:49 am
My compiler hates me.
So you are saying that when Richard Stallman started GCC project which had its first release in 1987, he knew somehow that there would be  a programmer who goes by the handle 'retrolefty', and put in special code just to torment this particular person.  And after control of GCC was moved to the GCC steering committee, all of us involved, keep this special code around just to make things difficult for you personally?

Somehow, even though I've been involved with the GCC project since 1988 (except for a small stint when I was working on other compilers), I seem to have missed out on this ultra-secret 'feature'.  smiley-roll smiley-roll smiley-roll smiley-roll

318  Using Arduino / Project Guidance / Re: monitor 12 vdc automotive battery used to start backup generator on: May 02, 2013, 03:41:55 pm

I recently got a small 4KW gasoline generator for $250 at Harbor Freight. I'd like to figure out how to hack it to convert it to propane and build an Arduino control system for it. Biggest problem is to hack an electric starter on an engine that doesn't have one... Hmmmm.

Buy a starter motor for a small car and replace the pullchain with a gear?
319  Community / Bar Sport / Re: should Compilers should be given personalities? on: April 30, 2013, 11:12:31 pm
I present to you the "amalgam scene specification error", aka the .ass error:

Apparently Microsoft didn't think the error and accompanying picture were funny, so they patched it out after it hit the press.
320  Community / Bar Sport / Re: Flying with Arduino on: April 28, 2013, 02:36:34 pm
Still can have your Big Gulp so it's not all large capacity feeding devices.

Wouldn't that exceed the 3oz fluid limit for carry-on baggage?
321  Community / Bar Sport / Re: Why would anyone make such a crippled IDE!?!?! on: April 27, 2013, 11:24:57 pm
How many files should a library need for programs to fit and run on a freaking MCU?

Honestly, some people just can't search:

WOW. Something useful actually came out of this thread. That IDE looks interesting, i'll have to check it out.
322  Community / Bar Sport / Re: Flying with Arduino on: April 27, 2013, 03:17:54 pm
It seems like a laptop computer and an Arduino board would be a great way to pass the time on long flights, as long as it doesn't attract the wrong kind of attention. I was wondering whether anyone has tried this.

Laptop, fine. Attached to an arduino with lots of wires sticking up all over, LOL. Air Marshal to the rescue.


Yeah, god help you if they find out its linked to "hackerspaces". They'd probably just shoot you and push you out the emergency exit.
323  Using Arduino / Project Guidance / Re: Sensing a tube in a foam plate on: April 26, 2013, 12:32:08 am
Why not a PCB under the foam with regular tact switches lined up under each hole. Wire them up like a matrix keypad. Shouldn't need as many pins that way. Just spit-balling here.

Or somthing like these small momentary pushbuttons:

That would require less force that way, plus more room for error.
324  Community / Bar Sport / Re: I've started getting spam in French. on: April 25, 2013, 07:33:25 am
You should request a non-refundable $50 donation for handling the transaction.
325  Using Arduino / Project Guidance / Re: Dino sound car horn on: April 22, 2013, 01:16:56 am
Ok so i will need the uno,mp3 shield, and a micro sd card. The free pins you are talking about would be used for what? Two of them would need to be used for the speaker out but those are on the shield and you are talking about the free pins on the uno?  I think 10 extra pins would be fine. The shield stacks on top of the uno with headers that i have to buy extra then there are about 10 pins left open? Do i need to buy the headers or are they included with the uno? These extra pins would be used for speaker out -2, power and ground -2, and the signal wire used to determine which track it needs to play which is only -1. That is only a total of 5 pins. Do i have a clue on what im talking about? How easy is the programming, do i need C++ knowledge or something like that? The only programming knowledge that i have is that i know there is one. Once i have it built does it use a USB for the programming? Will all my questions be answered with a provided book with the uno?

Yes, 10 free pins on the arduino. You don't need any pins for the speaker, since there is a built in 2.5mm audio jack on the shield. I believe the headers are included. That question should be directed to Sparkfun though. Power pins are also not included in the 10, since you can connect multiple things to the same power pins.

Getting an arduino to play MP3s is not a good beginner project. While the shield and library make it pretty easy, you will want to have a firm grasp on the basics first. In this case, the Arduino really isn't doing any of the MP3 Player work. It is just sending signals to a chip on the shield that handles the decoding and playback. You will want to follow some of the tutorials in the playground prior to starting this project.
326  Using Arduino / Project Guidance / Re: Dino sound car horn on: April 21, 2013, 11:21:11 pm
It looks like there is only one mp3 shield produced. That makes my choice easy but what about the choice of the main board? Also the mp3 board looks pretty bare how do i load the mp3s on?

You load the MP3s onto a microSD card, then plug that into the shield. The shield uses quite a few pins, I think theres only 10 free pins remaining (including the analog pins), so if you need more than that you might want to look into the mega or shift registers. The Uno works fine otherwise.
327  Using Arduino / Project Guidance / Re: Dino sound car horn on: April 21, 2013, 08:55:39 pm
I had good luck with the Sparkfun MP3 Player Shield. It took a few tries to get it working, but once I got it working it worked quite well.
328  Using Arduino / Project Guidance / Re: Speech recognition on: April 21, 2013, 12:46:53 pm
I do not want to use ready made shields for speech recognition.

329  Community / Bar Sport / Re: Debugging - a dark art? on: April 21, 2013, 12:39:50 am
Not at all computer-related, but my f(l)avourite debugging story, ever.

I actually had something similar happen with my truck. Every time I stopped at a store in this one specific town next to mine, my truck would either start hard, or not start at all. It only happened at stores in that town, and I never had a problem anywhere else. My friends always joked that it must be something in the air that my truck didn't like. It turned out to be a faulty oil pressure sensor. When heading to that town, I always took the interstate, which heated up the oil in my truck and lowered the oil pressure. In addition to that, the town was built on a wetland, so all the stores have slanted parking lots from the massive amount of fill that had to be trucked in to make the land suitable for building. The grade was enough to drain the already low pressure oil out of the sensor, and trigger a "low oil pressure" condition that is designed to prevent the engine from running in the event that it is severely damaged in a crash. Apparently the computer doesn't record that error condition, since it would normally be observable from outside the truck.

I was finally able to replicate the problem (by accident) in my driveway when I had one side of the truck up on ramps.
330  Community / Bar Sport / Re: Electric hammer for sale on: April 21, 2013, 12:25:54 am

been after one of these for ages to put up my sky hooks. smiley-grin,  
People have bid this?, really??
I wonder if they`ve noticed the P&P?? lol

I'm actually kind of surprised by the "similar to" auctions. Who buys sledge hammers on ebay?
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