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31  Using Arduino / Motors, Mechanics, and Power / Re: Cant figure out why my motor isnt working. on: February 20, 2014, 07:52:06 am
Those images are much too large to view as a whole; cannot comprehend the circuit as only a small portion of the circuit is viewable at any time. Please repost with a width of around 800 pixels. - Scotty
32  Using Arduino / Project Guidance / Re: Electronic valves project on: February 19, 2014, 07:55:09 am
So, what's your question? - Scotty
33  Using Arduino / Project Guidance / Re: Using arduino to control opening and closing of valve input from optical sensor on: February 18, 2014, 08:12:33 am
Example using opto-reflective device. Also, try googling for opto-interrupter device. Either will work for your project. - Scotty
34  Using Arduino / Programming Questions / Re: "ledring" controlled by potentiometer. Really need help with this. on: February 18, 2014, 07:26:28 am
The internet is an abundant resource. Try searching with keywords: arduino, leds, sequence. I did and one hit brought me back to this site with a tutorial for a For Loop. The hardware in the example circuit uses leds. - Scotty
35  Using Arduino / General Electronics / Re: What is this? on: February 01, 2014, 05:51:12 pm
6 and 16 pin DIL packages, in some foam.
And a ladder.

Dat's funny! - Scotty
36  Using Arduino / Project Guidance / Re: measure rotation of a bike wheel on: January 22, 2014, 07:30:15 am
Hall sensors mounted on spokes is going to present a wiring problem; at the least, slip rings would be required. Perhaps a better solution would be something like this. I am imagining one mounted to the forks and aimed at the rim of the wheel. The rim could be blackened out except where needed to get the resolution you desire. The linked device, being driven at 38khz, would eliminate any problems that may be caused by ambient light. - Scotty
37  Using Arduino / Project Guidance / Re: Large project, roughly 300 fairly bright lights individually controlled on: January 21, 2014, 07:45:05 am
Might the TLC5940 be  a good candidate? - Scotty
38  Using Arduino / Programming Questions / Re: Storing multiple values and then take average on: January 19, 2014, 06:05:49 am
You don't to store all the values read individually. Take the first reading and store it. Add all subsequent readings to the stored value. Finally, divide the stored value by the number of times the reading was taken. - Scotty
39  Using Arduino / General Electronics / Re: How do I know what resistors to use? on: January 18, 2014, 06:51:09 am
However running it at say 10mA will not be half as bright it will be brighter than that say three quarters as bright because perceived light brightness is not proportional to current.

Interesting! Thanks.
40  Using Arduino / Project Guidance / Re: Fuel Pump Sensor on: January 17, 2014, 06:59:52 am
So your problem using the device as is, is restriction? - Scotty
41  Using Arduino / Audio / Re: Audio Multiplexer advice on: January 13, 2014, 08:38:54 am
Thanks for the advice Grumpy Mike. Good to know to avoid starting off on a wrong path. - Scotty
42  Using Arduino / Audio / Audio Multiplexer advice on: January 12, 2014, 08:24:43 am
Seeking advice on the selection of an audio multiplexer to enable an output of multiple microphones to be selected. I've been investigating some analog multiplexers available but wonder if there is an IC more suitable to audio. Thanks - Scotty
43  Using Arduino / Project Guidance / Re: Motor with accurate feedback on: January 07, 2014, 09:35:52 am
A method I would consider using is an encoder strip running along the travel of the elevator. An opto interupter could read the steps of travel and another could read 'stops'. Something like image below. - Scotty

44  Using Arduino / Project Guidance / Re: MCP23008 and leds not working on: January 06, 2014, 10:16:34 pm
All too obvious now. Dang it! I hate it when I do that. Thanks for all your input guys. All is good now. Moving on. - Scotty
45  Using Arduino / Project Guidance / Re: MCP23008 and leds not working on: January 05, 2014, 02:57:37 pm
Bill, I don't understand.
According to the data sheet, the IO Direction Register address is 0x00.
When a bit is set, the corresponding pin becomes an input. When a bit is clear, the corresponding pin becomes an output.
- Scotty
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