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361  Using Arduino / Project Guidance / Re: My first project. In need of some assistance on: January 16, 2014, 09:47:39 pm
First look at the 'blink without delay' sketch in the IDE. <File:Examples:02Digital:BlinkWithoutDelay>
Once you understand that you can look into varying the timing with a pot.
362  Using Arduino / Project Guidance / Re: Laundry circuit control with card reader/database on: January 16, 2014, 09:24:45 pm
1) A relay will be the best option for controlling the circuit.
Yes.
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What is the limit to the number of plugs I could control?
Depends on the Arduino board you use. How many do you need to control?
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Is there a certain rated relay I will be required to use? (I know this sounds like a stupid question but Ive always struggled with electricity, currently even trying to get an electrolysis bath to work to clean parts for my 65 jeep)
Yes. One with contacts capable of switching the power requirements of the machine.
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2) A database will need to hold all of the appt numbers and card stripe linked to them to add/removed credits as necessary when used? I've never done this before and hoped for suggestions or platforms to use that would be best or suggested reading to learn more(I'm doing my best but again looking for advice more experienced than I)
How many cards/accounts will you need?
363  Using Arduino / Programming Questions / Re: Issues with how to code this. on: January 15, 2014, 07:40:39 pm
Don't call eyefade from eyefade either.
Yes. Recursion can often go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong, go wrong......!
364  Using Arduino / General Electronics / Re: How do components know how much current to draw on: January 14, 2014, 09:41:54 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.
365  Community / Bar Sport / Re: Thomas Edison vs Tesla on: January 14, 2014, 09:31:42 pm
I can't comment on the safety aspect, but just imagine the size of the conductors in the distribution grid if we'd have gone the DC route. There wouldn't have been enough copper in the world.
366  Using Arduino / Project Guidance / Re: 20-20-20 Timer on: January 14, 2014, 08:29:50 pm
Delay (200000) is 200 seconds.
Try delay (20000), or better still, use blink without delay
367  Using Arduino / General Electronics / Re: Arduino Basic Connections Index Card on: January 13, 2014, 09:52:59 pm
39  Transistor CoMparison Table
368  Using Arduino / Programming Questions / Re: motor timing problem on: January 13, 2014, 09:34:20 pm
You need to reset previousMillis = currentMillis if timer has run out.
369  Using Arduino / Project Guidance / Re: multiple input monitoring on: January 13, 2014, 09:09:12 pm
 
Code:
if (digitalRead(input1) && digitalRead(input2) && digitalRead(input3) && digitalRead(input4) && digitalRead(input5) &&  digitalRead(input6) ) {   
//check if ALL are HIGH
   digitalWrite(Relay,        HIGH);
  }
  else {  //one or more is LOW
   digitalWrite(Relay,        LOW);
 
 
370  Using Arduino / Project Guidance / Re: Roomba for lego pieces? on: January 12, 2014, 10:30:53 pm
I have (now grown) children so know exactly the physical properties of Lego and Duplo bricks. I even know the pain of standing on a lego brick in bare feet.  smiley-eek-blue
The problem is that the bricks are light and, on a fairly smooth surface, will slide away rather than onto the forks.
Heavier bricks wouldn't be so much of a problem.

It might be possible to tip the bricks on their side with the forks placed high on the brick and then use the hollow base to pick them up. Duplo bricks, being larger, would be easier for this method.
371  Using Arduino / Project Guidance / Re: Heilcam on: January 12, 2014, 09:39:08 pm
I thought , from the subject line, that this was something to do with Nazi rallies.
372  Using Arduino / Project Guidance / Re: Retrofitting Old Vending Machine: Arduino + Payment Processing Parts on: January 12, 2014, 09:34:27 pm
The MEI will have to be on-line to a credit card company (Visa and/or Mastercard, etc) to authorise payments. You will also have to get the credit card company to accept you as an authorised 'agent' before they will accept payments through your machine. They will also take a percentage of the payment for their work.
373  Using Arduino / Project Guidance / Re: Roomba for lego pieces? on: January 12, 2014, 09:19:20 pm
I'm thinking one mobile bot to push pieces around on the floor.
Fork lift truck??
The difficulty there might be getting the forks under the brick.
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Another static assembly to lift them into the bucket via pincer, belt, etc.
If your static assembly had a thin flat platform the bot could just push the brick on to it. Raise the platform vertically and tip it once it is above the level of the bucket. I'm imagining something like
1)  Two umbrella shaped runners (handles at the top) for the platform or
2) A protrusion on the back of a hinged platform that comes into contact with a static part at the top of a straight lift so that it tips the platform towards the bucket.
374  Using Arduino / Project Guidance / Re: multiple input monitoring on: January 12, 2014, 08:31:10 pm
if (INPUT1 && INPUT2 && INPUT3 && INPUT4 && INPUT5 && INPUT6) { //check if they are all high
  OUTPUT = HIGH;
}  //If not, at least one of them must be low
else OUTPUT = LOW;
375  Using Arduino / Project Guidance / Re: Leadscrew for dust cover on: January 12, 2014, 08:22:34 pm
My local builders merchant sells threaded rod in 1Mtr lengths, in various sizes (from about M8 to M16).
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