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19441  Using Arduino / Project Guidance / Re: digital switch? on: October 05, 2011, 06:20:25 am
The absolute maximum is 40mA per pin, and about 200mA per package, depending on device.
19442  Using Arduino / Programming Questions / Re: Putting it all together! on: October 05, 2011, 06:15:33 am
Carriage-return is code 13 - is it your println?
19443  Using Arduino / Project Guidance / Re: digital switch? on: October 05, 2011, 06:10:02 am
25mA from one pin is fine - how much current do these things draw?
19444  Using Arduino / Motors, Mechanics, and Power / Re: H-bridge motor spinning slow (1.45 volts when I need 5.00 volts) on: October 05, 2011, 05:50:56 am
You're probably drawing too much current.
Try using a separate supply.
19445  Using Arduino / General Electronics / Re: Fade motor on: October 05, 2011, 05:40:47 am
If it is an RC motor, then an appropriate RC ESC can be driven using the servo library.
19446  Using Arduino / General Electronics / Re: 1volt clock on: October 05, 2011, 05:39:49 am
Logic doesn't have to work at TTL voltages.
Your mobile phone doesn't, and neither does the processor in your PC.
19447  Using Arduino / Project Guidance / Re: digital switch? on: October 05, 2011, 05:37:09 am
What's wrong with an output pin?
19448  Using Arduino / Project Guidance / Re: digital switch? on: October 05, 2011, 05:23:28 am
Your Arduino has several of them, and they're configurable too.
19449  Using Arduino / Programming Questions / Re: sweep servo not working ??? on: October 05, 2011, 01:44:05 am
If you go back to your post, click on "modify", then highlight all the code, then click on the # icon in the editor toolbar, your code will be neatly presented and legible in a proper code box, without italics.
19450  Using Arduino / Programming Questions / Re: Bug? Or just wrong Code? on: October 05, 2011, 01:41:17 am
It may just be that you've run out of RAM.
19451  Using Arduino / Project Guidance / Re: Ultrasonic Sewage Monitoring System on: October 05, 2011, 01:37:53 am
Quote
Some sort of solution in your property is a much better bet.
High-molar sodium hydroxide is my solution of choice for this sort of problem.
19452  Using Arduino / Sensors / Re: Counting pulses from a sensor on: October 04, 2011, 11:08:04 am
Don't you want FALLING, not LOW?
19453  Using Arduino / Programming Questions / Re: Tagging multiple sensors for Serial.print on: October 04, 2011, 11:02:30 am
No, an int is -32768 to+32767.
19454  Using Arduino / Sensors / Re: Counting pulses from a sensor on: October 04, 2011, 09:54:43 am
25000 pulses per minute is only 420 pulses per second (one every 2.4ms or so).
You should be easily be able to count this.
Be aware that if you're using serial output to report results, unless you are using interrupts, you will probably miss pulses during serial prints.
19455  Using Arduino / Project Guidance / Re: Ultrasonic Sewage Monitoring System on: October 04, 2011, 09:44:01 am
Quote
What is going to transmit through an inch of cast iron?
Gamma rays -  a mere 10 exahertz  smiley-twist
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