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361  Community / Bar Sport / Re: Ouch! Eagle Go Bye-Bye! on: March 22, 2013, 02:23:46 pm
You should look up "I wanna be the guy" for a crazy-difficult game.
362  Community / Bar Sport / Re: Where did you lose your packages? Who's lost packages as buyer/seller? on: March 21, 2013, 12:23:35 pm
I havn't lost any yet, but a couple have taken several weeks to arrive via USPS to foreign countries.  Held up in in-country Customs seems to be the cause.


Ya know, I make and sell fake bombs, and I have never had a problem with customs. I think they just choose people at random.
363  Using Arduino / Project Guidance / Re: Adding smell to a project on: March 21, 2013, 11:52:59 am
Sparkfun has these 5v heating pads: https://www.sparkfun.com/products/11289

They may get warm enough to trigger some scented oils.
364  Using Arduino / Project Guidance / Re: ABC - Arduino Basic Connections on: March 21, 2013, 11:49:07 am
This is awesome.
365  Community / Bar Sport / Re: Where did you lose your packages? Who's lost packages as buyer/seller? on: March 21, 2013, 11:39:43 am
I havn't lost any yet, which is worrying me. Every package that makes it to its destination increases the chance that the next one wont, lol.
366  Community / Bar Sport / Re: Idiot spammers on: March 20, 2013, 12:27:21 am
Just got this email spam:

Quote
We want to put a great big grin on your face in 2009. You'll be to rejoice all year.

Massive fail for whoever took some boilerplate and didn't even bother to check the year in it.

Maybe they're serious and they invented an Aruino powered time machine?
367  Using Arduino / Project Guidance / Re: Heating water? on: March 19, 2013, 09:11:27 pm
You could also look into engine block heaters for vehicles if you need more heat. They get pretty hot, and go for about $20 on Amazon. Theres a bunch of different kinds, some are just heating elements that are made to go inside frost-plug holes, others are just large blocks with a magnet on one side to stick to the engine (usually the oil pan), and others are designed to mount in-line with the engine coolant system to heat it up directly.
368  Using Arduino / Project Guidance / Re: Control PWM fan speed depending on tempature on: March 19, 2013, 10:32:43 am
It would be a fan like so: http://www.frozencpu.com/products/15479/fan-968/Cooljag_Everflow_70mm_x_10mm_PWM_Fan_R127010BUAF.html

Quote
Pin 1 Black (GND), Pin 2 Yellow (PWR), Pin 3 Green (SGN), Pin 4 Blue (PWM)

I would hook the 12v (Yellow) to a power supply and ground (Black) to both the power supply and the arduino. Finally hook the PWM digital pin 7 to the PWM wire (Blue) on the fan. Do not know what to do with the signal (Green) wire?

Still looking for code to read the PWM from the fan though....

David

IIRC, the green wire is a tach signal, that you can use to determine the current speed of the fan.
369  Community / Bar Sport / Re: What they teach in school. on: March 19, 2013, 12:42:54 am
School is pretty worthless for most intelligent people anyway. They train you to do what you are told, respond to the sound of a bell, and bog you down with busywork. Most of the knowledge that I did manage to scrape from my grade-school (and even early college) experience, was due to good instructors that went above and beyond their simple coursework.

My school was just starting to try this when I graduated. Too much emphasis is based on group work, when we need to be teaching students to think independently. You form your ideas, figure out your plan, and THEN seek out other people that can help you accomplish your goals, but only if the additional members will add something to the project. Forcing students to work in groups just adds extra overhead, encourages social loafing, and forces you to find uses for the people you are stuck with.
370  Community / Bar Sport / Re: Trickle or disconnect charger for laptop? on: March 19, 2013, 12:21:24 am
I know that constantly leaving laptops on the charger is bad for long term battery life, so it would probably be best to have one that disconnects after reaching full charge. My laptop has a "long term AC power" option that cycles the battery from 50% to 100%. When it reaches 100%, it makes the laptop run off battery power till it hits 50%, even if plugged in.
371  General Category / General Discussion / Re: Arduino Packaging Strategy is Wasting Paper Products on: March 19, 2013, 12:15:59 am


That is a ridiculous amount of paper, probably just for retail marketing purposes.
372  Community / Bar Sport / Re: a look into the arduino factory on: March 16, 2013, 03:39:35 pm


SO much IO!

Arduino super-computer blades anyone? lol.
373  Community / Bar Sport / Re: Free computer power supplies, hard drives, and CD drives on: March 13, 2013, 08:18:15 pm
how many hard drives we talking about by the way?

we consume them quite a bit at work, all small things just to run windows and one application for a machine, getting low on stock

I have about 16 last count. Not sure how many of them work though. I could test them for read/write with a IDE to USB adapter before I ship. Wouldn't it be cheaper to just use SD cards to run windows? You can get 8GB ones off Amazon for like $10, and a lot of them will fit in one box.

I also uncovered this:


Its a box of payphone keypads.... The cable going from the keypad part to the PCB part is only 7 wires, so I think they are matrix keypads. Could probably fit two in a small flat rate box. Some of them look like self contained little POTS phones. They have headers for TX mic, RX REC, hook, line, and volume.

It looks like flat rate boxes are the cheapest to use to ship everything, due to the weight.
374  Community / Bar Sport / Re: Free computer power supplies, hard drives, and CD drives on: March 13, 2013, 05:56:14 pm
I also just found a pail of floppies. Literally, a 5 gallon bucket full of 2.5" and 5.25" floppy disks.
375  Using Arduino / Project Guidance / Re: Arduino Cell phone repeater / signal booster on: March 13, 2013, 04:26:19 pm
Any signal booster or repeater would have to operate on frequencies owned by your cellphone provider (or the company they lease from), so you would need permission to use them.
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