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16921  Using Arduino / LEDs and Multiplexing / Re: Texas Instruments TLC5940 explanation on: October 17, 2011, 03:58:38 pm
I counted three.
16922  Using Arduino / LEDs and Multiplexing / Re: Texas Instruments TLC5940 explanation on: October 17, 2011, 03:34:17 pm
Quote
I don't understand the diagram, do you take out the atmega and then just use the tlc? or what
I don't particularly like Fritzing diagrams, but this
http://students.washington.edu/acleone/codes/tlc5940arduino/img/breadboard-arduino-tlc5940.png
looks pretty clear to me.
(it's the one in the playground)
16923  Using Arduino / Project Guidance / Re: IMU and motor accurancy on: October 17, 2011, 03:30:18 pm
The accuracy would depend on the FOV of the telescope, I would have thought.
Can't imagine R/C servos would cut it.
16924  Using Arduino / LEDs and Multiplexing / Re: Texas Instruments TLC5940 explanation on: October 17, 2011, 03:26:52 pm
Did you read the article at the playground and try the library examples, or are you just trolling?
16925  Using Arduino / General Electronics / Re: Resistance question on: October 17, 2011, 03:25:27 pm
Most PC power supplies don't have output voltages higher than 12 volts, so that 15V plus is still looking elusive.
16926  Using Arduino / LEDs and Multiplexing / Re: Texas Instruments TLC5940 explanation on: October 17, 2011, 03:12:24 pm
But posting a question about the TLC5940 in the microcontrollers section (as this topic originally was) was not justified
16927  Using Arduino / General Electronics / Re: Resistance question on: October 17, 2011, 03:00:19 pm
Quote
I can put 4 leds in a series with my arduino and they'll work without any resistors while the arduino is plugged into the serial bus port
Only if the Vf of all your LEDs add up to less than 5 volts.
Can I suggest you don't connect anything without resistors until you understand more?
It is a great way of burning-out Arduinos.
16928  Using Arduino / General Electronics / Re: Resistance question on: October 17, 2011, 02:38:42 pm
Quote
I'm just curious, for example, say i put 4 of these in a series circuit, how much resistance would I need?
Forget resistance for now, you're going to need at least  4 * 3.8 volts of supply to start with - that's a minimum of 15.2 volts.
Do you have a suitable supply?
16929  Using Arduino / Project Guidance / Re: Shirrif's IR library and interrupts on: October 17, 2011, 02:06:46 pm
Absolutely - you simply check for received codes each time through "loop"
16930  Using Arduino / Project Guidance / Re: Shirrif's IR library and interrupts on: October 17, 2011, 01:57:23 pm
Well, one way would be a simple state machine.
I don't imagine an interrupt is necessary.
16931  Community / Exhibition / Gallery / Re: Syma S107 Helicopter Infrared Control w/webcam on: October 17, 2011, 01:52:02 pm
Take it to PM, people, please.
None of this is helpful
16932  Using Arduino / Project Guidance / Re: Shirrif's IR library and interrupts on: October 17, 2011, 01:49:14 pm
But the pin will be CHANGING all through the reception of a code.
16933  Using Arduino / Programming Questions / Re: Selecting action based upon string comparison - how? on: October 17, 2011, 01:47:22 pm
Not sure about all that stuff in "setup" - why not let the compiler do the legwork?
Code:
//Declare our lookup table
funcLookup funcTable[NUM_COMMANDS] = {
 {"func1", func1},
 {"func2", func2},
 {"func3", func3}
};
16934  Topics / Device Hacking / Re: Ultrasonic distance meter + Arduino UNO on: October 17, 2011, 01:11:39 pm
I'd have a prod around the test points on the lower right of the first photo, then around the Atmel chip.
16935  Using Arduino / Microcontrollers / MOVED: Texas Instruments TLC5940 explanation on: October 17, 2011, 01:01:59 pm
This topic has been moved to LEDs and Multiplexing.
This is not appropriate for the microcontroller section
http://arduino.cc/forum/index.php?topic=75652.0
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