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16  Using Arduino / Project Guidance / Re: Rgb led with stop button? on: November 11, 2012, 07:46:58 pm
Thanks guys. This is great. Zack, you're an inspiration to my son and a really good guy!
17  Using Arduino / Project Guidance / Re: Rgb led with stop button? on: November 11, 2012, 05:52:08 pm
Thanks, looks like this needs MOFSETS. I've gotten the fading to work without them but i'm looking for a sketch that'll stop on a certain color with a button press. I'm surprised there's not an existing sketch out there. Thanks again!
18  Using Arduino / Project Guidance / Rgb led with stop button? on: November 11, 2012, 05:04:08 pm
Me and my 11 year old built a little project with an rgb led and a button. We're looking for a sketch to run it that will fade through all the colors and when it's at a color my son likes, he can press the button and freeze it on that color (its a night light).

Has anyone seen one out there? Trying to jump start his interest in learning how to code with something cool like this.

Thanks!
19  Using Arduino / General Electronics / Re: Battery drain when LED's are off on: November 06, 2012, 04:43:17 pm
Thanks! I was looking for what to do next with my son. This is perfect. Thanks so much!
20  Using Arduino / General Electronics / Re: Battery drain when LED's are off on: November 06, 2012, 02:41:06 pm
Thanks guys,

Yeah, I have resistors but didn't realize the power drain was so significant. I guess most of the projects I'm seeing are plugged into the wall or have an on/off switch, huh? Thanks again!
21  Using Arduino / General Electronics / Battery drain when LED's are off on: November 06, 2012, 02:06:30 pm
I built a simple project with my son. It's sort of a nightlight where four led's are connected to the Arduino via a breadboard and there's a button attached to it. He pushes the button and the lights go on and again and the lights go off. I figured the LED didn't use much power so it could be run off of a 9 volt battery for a good amount of time.

We connected a 9 volt battery to the power connector. It worked great as his first stand-alone device. He didn't use it yet, but overnight the battery drained, even though the button wasn't pressed and the LED's weren't on. Any ideas why? I noticed there's a little light lit on the board even when the button isn't pressed. Could that tiny light be draining the battery?
22  Using Arduino / General Electronics / Re: Breadboard without the outside rows OK? on: October 14, 2012, 03:03:32 pm
Thanks Michael. That helps!

Bob
23  Using Arduino / General Electronics / Re: Breadboard without the outside rows OK? on: October 14, 2012, 01:34:52 pm
Thanks for taking the time Robitabu for explaining all that and posting the pics. That exactly what I was wondering and this helps a lot. Thanks Chagrin and Grumpy Mike as well for shedding more light on this. really nice of you to help.
24  Using Arduino / General Electronics / Breadboard without the outside rows OK? on: October 14, 2012, 09:34:36 am
Hi,

I bought a starter kit on Amazon and the little breadboard that came with it does have the "channel" running down the middle but the two rows along the outside edge that seem to be where the higher voltage power connects aren't there like I see in other people's projects.

My son and I were able to do the blinking light project with it but we're now trying to do a three LED cross fade project and all the boards I'm seeing in the tutorials have the outside pair of rows.

I remember reading that these rows are good because the connections under the rest of the holes on the breadboard aren't strong enough to handle the power.

Clearly I'm a newbie but hoping to build the project without getting a new breadboard. The below link shows what we have. Any insight would be appreciated and any links you know of showing wiring without the better breadboards for 3 separate LED's would be appreciated if there's any significant difference.

It's the one in the group shot, not the separate sht of the breadboard.

http://www.amazon.com/gp/product/B004HL44MI/ref=oh_details_o04_s00_i01

Thanks!
25  Using Arduino / Motors, Mechanics, and Power / Re: Possible to lift a trap door automatically with an Arduino and winch-type motor? on: October 09, 2012, 10:15:32 am
Thanks guys. CrossRoads, they are wicked awesome but you're right, a little overkill. I just tried to figure out the weight the winch would need to be pulling and it looks like under 20 lbs at it's heaviest point. I'm going to look for a lighter-weight winch but it looks like I'm on the right track now.
26  Using Arduino / Project Guidance / Re: Fall asleep on: October 09, 2012, 09:02:42 am
Here's a commercial product that might be a start. Maybe they have some specs on their Web site:

http://www.amazon.com/Zapper-NZ-1-Driver-Alert-Alarm/dp/B000V5J3SE

Hope this helps
27  Using Arduino / Motors, Mechanics, and Power / Possible to lift a trap door automatically with an Arduino and winch-type motor? on: October 09, 2012, 08:58:37 am
Between my second floor and attic there are stairs but at the top there's just a trap door in the ceiling. It's heavy enough that it's hard to open if I'm carrying a couple of things with one arm. I'd like to have some sensor on the stairs that triggers a motor to pull up the door. I'm assuming I'd use a stronger motor/winch like device which will wrap up a cable or rope connected to the door.

Is there an existing project out there that might get me started? It looks like the hardest part for me at this point would be knowing how to connect to an Arduino a winch-like device that would probably have to get it's main energy from a power outlet. Any step-by-step tutorials out there for doing something like that or any general recommendations on which materials I'd need, even?

Me and my son are new to the Arduino and don't have a great understanding of electricity, I'm afraid. Any guidance would be appreciated.

Thanks,

Bob
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