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16  Using Arduino / General Electronics / Re: Help Identifying Capacitors. on: September 08, 2014, 09:44:54 pm
I hate to say anyone wrong but the 275 volt cap is used on bower fans like you find in window AC and could be used on your motor too
17  Using Arduino / General Electronics / Re: Using Arduino digitalpin as a standalone switch on: September 07, 2014, 09:15:47 pm
Have a look at this http://electrosome.com/transistor-as-a-switch/
18  Using Arduino / Project Guidance / Re: Problem connecting Arduino Uno to Windows computer on: September 07, 2014, 09:07:23 pm
Or it;s not a windows pc it's a chome book
19  Using Arduino / General Electronics / Re: Wiring Capacitors in Series on: September 01, 2014, 09:07:34 pm
You have a supper capacitor that can hold a charge http://www.karlssonrobotics.com/cart/super-capacitor-low-esr-1f2-5v/?gclid=COPMjsy4wcACFZJr7AodU00Aqw
Quote
Description: Yes you read that correctly – 1 Farad capacitor. This small cap can be charged up and then slowly dissapated running an entire system for hours. Combine two in series for 0.5F/5V. Do not over voltage or reverse polarize these capacitors.

And yes there 2.5 volt used like a fast charged battery in toys and stuff
DO not OVER Charge these they can and will hurt you. 2volts is a safe charge for them.

This baby can hold a lot of power
20  Using Arduino / General Electronics / Re: Ohm's Law. on: September 01, 2014, 06:16:57 pm
There really no crap it's simple ADC  is so miss understood on a micro it reads based on 0 to 1024 or is it 0 to 1023.
No there 1024 steps but that will not fit in 10 bit so we get the 0 to 1023.
So we are now trying to do math that's that has no error and the ADC of a arduino can be off more then the whole point of is it 1023 or 1024 it reads a range and tells you is value you'll never get a true math answer. Just a good as it gets is about it.

So that's where the debate comes in My math is closer to in this case Ohm's law   
21  Using Arduino / General Electronics / Re: Ohm's Law. on: September 01, 2014, 04:08:25 pm
Diversions come about when some one is wrong and has to be corrected.
Like your use of the word intensity, what does that mean in this context.
Maybe we reading waves  of power
22  Using Arduino / General Electronics / Re: PIR false positives on: August 28, 2014, 10:05:33 pm
It sure sounds like its floating on the output. But lighting will mess them up too
23  Using Arduino / Project Guidance / Re: How to power the Arduino from a UK light switch on: August 23, 2014, 09:21:42 pm
I'm just wondering  cause wire here is two wire too but your not counting the ground its sold as 14-2  and 12-2 for thing like wall outlets
and lighting. but you still have all three wires.

Have a look at this http://www.discovercircuits.com/Andy/Parasiticpowersupply.pdf
24  Using Arduino / Project Guidance / Re: How to power the Arduino from a UK light switch on: August 23, 2014, 08:50:11 pm
Absolutley not.

Lightswitches in uk no not have a neutral.

If you use the earth the very best situation would be you trip a leakage breaker if you have one.
They are not connected to lighting circuits in domestic situations any way.

Worst case various electrical devices in home will suddenly become live wrt local earth, FATAL.

So they just break the hot and don't bring the neutral in the box. There is ways of doing this but I wouldn't want some one with
no idea of whats in the switch box putting his hand in there they use higher voltage over there.
25  Using Arduino / Project Guidance / Re: Obstacle Avoiding Robot Help on: August 23, 2014, 01:55:35 pm
You got a lot of problems going on here. First off how are you driving the wheels ?
If your using two motors to move forward one side turns CW and one turns CCW  but that can be fixed in the wiring of the motor.
Or handled in code.
 Next thing you need to figure is ok im moving forward at high speed going to hit a wall how long does it take to stop before that happens.
We have to act on that to do one of two things low down or stop then figure new path to take in your case stop looks like what you want.
Then figure new path.

To help with the code need to see how you have it wired..
26  Using Arduino / General Electronics / Re: R5 on LCD broken? on: August 20, 2014, 09:34:12 pm
Two of mine are marked 222 for R5
27  Using Arduino / General Electronics / Re: R5 on LCD broken? on: August 20, 2014, 09:09:30 pm
Sorry your talking about the resistors on the back should of looked at your pic sure thats not part of the back light.
28  Using Arduino / General Electronics / Re: Setting up an arduino controlled relay causes main short circuit on: August 28, 2013, 06:12:11 pm
Pictures always help
29  Using Arduino / Project Guidance / Re: Uno3 and Uno2 on: August 22, 2013, 10:47:53 pm
Maybe you've got a bad part then.
If you swap the 328s between the 2 boards, does the R2 work and R3 not work?

That was next on my list I'm looking for the tube of 328 I have to swap one and see.
My uno rev3 has had the chip pulled so much i've about broke the pins off lol.

Well I couldn't find the tube of 328s I have so I pulled chip and swaped them they both work now maybe the chip wasn't seated good or something on the Rev2 I guess

Thanks
30  Using Arduino / Project Guidance / Re: Uno3 and Uno2 on: August 22, 2013, 10:38:06 pm
It works on the uno rev3 but the uno2 it doesn't work on. I found the sch for a Rev2 and it doesn't even show any SDA or SCL lines.
but there both ATmega328 So it looks like they should be the same.

It's hooked up like this on both
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