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721  Using Arduino / Project Guidance / Re: Arduino to restart frozen computers on: January 30, 2014, 02:11:07 am
A transistor per computer (or if you must, relays)

To keep costs down, I'd have an Arduino on your lan, have a program on each machine which connects to the arduino, grabs the ip or machine number eg send to the arduino "machine 3" you parse out the value, ie in this instance "3" .

Any machine not resresponding or showing itself, send a signal to the base pin of the transistor for several seconds (4ish seconds) to power it off followed by a delay to switch it back on...

A buch of transistors, 1 ethernet shield, and a lot of programming...
722  Products / The Arduino Starter Kit / Re: Project 2 - Spaceship Interface - Digital Input Confusion... on: January 19, 2014, 09:04:20 pm
Nasa has certainly had a lot of budget cuts  smiley-eek
723  Products / The Arduino Starter Kit / Re: DigitalReadSerial AM I THE ONLY ONE WHO CAN'T GET IT TO WORK ????? on: January 19, 2014, 09:03:08 pm
You wired it exactly aa specified. ..

How do we know?
724  Community / Bar Sport / Colorado Legal (this moment in time) Invention .. on: January 16, 2014, 08:51:12 pm
Something never been invented.... and Legal...

(I'm poor, if you make over 10 million, I want 1 million dollars lol, even if you make 1billion i'm not greedy lol...)

Basically, Vaporizers take the marijuna to around 185c and it vaporizes the THC (the active drug component of cannabis) it then turns it into a whispy, steamy vapor (hence the name a Vaporizer) . well let's turn the machine that does that into a Commerical Sized one, and instead of placing a small amount, we stick a pound of marijuna into a machine.

We now have Vapor/Clouds whatever including the plants water, and we pump it into a Sauna the Sauna will get warm, the water and oxygen will all mix together resulting in a dense cloud/sauna type conditions but full of THC from the vaporizer machine made from just a couple of hot plates, a fan and a pipe to extra the vapor, a thermostat to regulate the heat of the hotplates, someway to contain it all ,a mico to read the data turn it on and off, maybe a solid state relay...

once design is done, You'll have the worlds first Marijuana Sauna...

On the sign to the Marijuana Sauna... [No sleeping]...

Thanks for Listening.

725  Using Arduino / General Electronics / Re: How do components know how much current to draw on: January 14, 2014, 10:29:55 pm
Q: How does your tap [faucet] know how much water to draw from the supply?
A: It doesn't know anything. It draws as much as you demand.

A: It doesn't know anything. It draws as much as you demand.

this is a short circuit, to prevent a short, you induce resistance into your circuit purposely via a resistor or a bulb, if it's a diode like an LED, you need to limit it's current with a resistor or controlling the current flow with  more diodes or semiconductors like a couple of transistors and resistor to measure current flow and adjust the current flowing through the transistor.

Ohms law again.
726  Community / Bar Sport / Thomas Edison vs Tesla on: January 14, 2014, 09:06:46 pm
Edison and westinghouse pitched the ideas for a Generator, tesla high voltage ac, edison low voltage dc.

Great shows were put on, electrocution from both power sources, DC was supposed to hurt but not kill you... well I've been zapped a couple of times at 240ac but I've felt my muscles contract from the sparks from battery terminal clips when high current flows...

So it begs the question a high powered dc low voltage placed near your heart, this should be able to kill?
727  Using Arduino / General Electronics / Re: How do components know how much current to draw on: January 14, 2014, 08:05:47 pm
Ohms law...

The wire's resistance will limit the total current available to your circuit, with exception to mainly diodes and batteries which operate on current after a required voltage has been provided.

Leds and batteries will consume large amounts of current providing the differential difference is high enough.
728  Community / Bar Sport / Re: whats with the attitude on: January 14, 2014, 07:39:02 pm
It's a self regulating fan site, without the fans the product would not exist
729  Using Arduino / LEDs and Multiplexing / Re: Noobish LED Question on: January 13, 2014, 02:19:59 am
You just need a transistor rated for enough current to power them.
730  Using Arduino / General Electronics / Re: 555 timer not resetting when connected to two relays... on: January 12, 2014, 09:10:43 am
Then it has to be a current issue then!

Measure the voltage drop of the battery when in atable.
731  Using Arduino / General Electronics / Re: 555 timer not resetting when connected to two relays... on: January 12, 2014, 08:57:00 am
I believe this is a wiring issue.

But really though, dump the relays for Transistors.
732  Using Arduino / General Electronics / Re: 555 timer not resetting when connected to two relays... on: January 12, 2014, 08:53:49 am
733  Using Arduino / General Electronics / Re: 555 timer not resetting when connected to two relays... on: January 12, 2014, 08:51:42 am
Your schematic does not look right.

Pin 2 detects a low signal.
Pin 6 detects high (causing pin 7 to discharge it)

734  Using Arduino / General Electronics / Re: I need please explanation in this schematic on: January 10, 2014, 10:22:38 pm
I have a friend who's studying English and Aged Care, and she told me that this woman in the class who'd been here in Australia just 3 months had asked the question, who do i need to go to pay for the certification?.. she then proceeded to go on about in Asia where she was from (no specific country i'm not going to be racist) she said she just paid $2000 and got what she wanted from the actual school.

Terrifies me to think people in those countries may be working *legally* with absolutely no clue...
735  Using Arduino / General Electronics / Re: Relaying/switching 2000w at 240v on: January 10, 2014, 09:24:58 am
http://www.ebay.com.au/itm/HHC68A-1Z-AC-220V-Coil-General-Purpose-Relay-8-Pins-SPDT-15A-240V-AC-15A-28V-DC-/400580260812?pt=AU_B_I_Electrical_Test_Equipment&hash=item5d4471b3cc

3600watt (no heatsink required)

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