Would anyone happen to know the a/d resolution of the BX-24?? thanks, kevin...
5478
Tony Brenke
trbrenke@...
Mar 1, 2001 9:20 am
in the docs. under getadc units are in 5/1023 volts 4.89 mV ... ===== Tony Brenke North Tacoma, WA __________________________________________________ Do You...
5479
Tony Brenke
trbrenke@...
Mar 1, 2001 9:23 am
over a RS485 you can get away with a stranded pair that is unshielded up to a couple of hundred meters long. ... ===== Tony Brenke North Tacoma, WA ...
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Tony Brenke
trbrenke@...
Mar 1, 2001 10:26 am
akkk that should be twisted pair. ... ===== Tony Brenke North Tacoma, WA __________________________________________________ Do You Yahoo!? Get email at your...
5481
Tom Igoe
tom.igoe@...
Mar 1, 2001 12:09 pm
... 10 bits; it's in the hardware docs somewhere. -- -- Tom Igoe...
5482
gtbecker@...
Mar 1, 2001 12:29 pm
... Not quite 10 bits. 10bits -1 fullscale, oddly. 1 bit value= 5.0v/1023. Tom Becker --... ...-- The RighTime Clock Company, Inc. Cape Coral, Florida USA ...
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George Chamilothoris
thor@...
Mar 1, 2001 12:38 pm
Hello All, In setting pulse times i keep wondering what may be the actual execution overhead for puting pins hi and lo, setting to sleep, calculating a logical...
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Chris Harriman
chrish@...
Mar 1, 2001 5:27 pm
It's 10 bits. And yes it's 10 full bits. 0 through 1023 = 1024 Remember 0 is a value to. ... From: GTBecker@... <mailto:GTBecker@...> ...
5485
gtbecker@...
Mar 1, 2001 6:00 pm
... According to your GetADC documentation (" ... Range is 0 to 1023. For 5 V systems, units are in 5/1023 volts (about 4.89 mV). ... "). Those two statements...
5486
JohnCWray@...
Mar 1, 2001 7:16 pm
I don't see a contradiction. The ADC output runs from 0 - 1023 (10 bits), corresponding to 0V - 5.0V, so each ADC unit corresponds to 5/1023 V. John In a...
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Tony Brenke
trbrenke@...
Mar 1, 2001 7:26 pm
I agree no contradiction. 0 = 0 volts 1023 = 5 volts 5/1023 = .0048875 = 4.89mV ... ===== Tony Brenke North Tacoma, WA ...
5488
rcuetara@...
Mar 1, 2001 7:53 pm
The BX24 docs are misinterpreting what a 10 bit resolution means in this case. The Atmel docs indicate that the A/D method is succesive approximation, in this...
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Tom Igoe
tom.igoe@...
Mar 1, 2001 8:04 pm
Has anyone read Charles Siefe's "Zero: A Natural History of a Dangerous Idea"? good book. -- -- Tom Igoe...
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gtbecker@...
Mar 1, 2001 8:13 pm
... corresponding to 0V - 5.0V, so each ADC unit corresponds to 5/1023 V. That _is_ the contradiction, John. The divisor must be 1024 if it is a 10-bit ...
5491
Kirk Lovewell
klovewell@...
Mar 1, 2001 8:32 pm
2 bit a/d, 0-5V: 00 - 0V 01 - 1.667V 10 - 3.333V 11 - 5.000V Sure looks to me like the resolution is 5/3 or 1.667V, or in the more general case: (2^n-1)/FSV ...
5492
Tony Brenke
trbrenke@...
Mar 1, 2001 9:30 pm
that stands to resion. I guess the main question would be if you are worried about weather you are off by 4mV why are you mesuring it with a bx-24? these...
5493
gtbecker@...
Mar 1, 2001 10:48 pm
... Perhaps, but measurement difficulty does not affect the correct math. If the DAC (which internally generates the analog voltage that's compared to the...
5494
JohnCWray@...
Mar 1, 2001 11:17 pm
Does the BX documentation actually say that Vref is 5V? Assuming a perfect ADC, the documented behavior would be realised if Vref were actually 5.0049V. I'm...
5495
gtbecker@...
Mar 1, 2001 11:39 pm
... Look at the schematic, yes. Regulated Vcc is tied to VRef. ... were actually 5.0049V. Yes, but that is not the case. ... documented as returning a value...
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JohnCWray@...
Mar 2, 2001 1:43 am
... My point was that the difference between the behavior you want and the behavior documented is only 0.1%, while the Vcc regulator is spec'd to 0.5%. If...
5497
gtbecker@...
Mar 2, 2001 3:15 am
... Yes, the error below 1.0 is small. It is the 1.0 that is incorrect and should not occur. The data from the 8535 processor ADC hardware is a 10-bit...
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Neil Jepsen
jepsen@...
Mar 2, 2001 4:10 am
Yeah I know that Tony, and in fact am using 485. What I've got is a digital clock and scoreboard for a Large basketball stadium. The master control unit will...
5499
JohnCWray@...
Mar 2, 2001 4:47 am
... Oh - I thought you were talking about the integer version of GetADC. That is documented as returning an integer value between 0 and 1023, units 5/1023 V. ...
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Fringe Ryder
fringe@...
Mar 2, 2001 5:27 am
Forgive me, but how do you do RS485 with the BX24? I didn't find that in the docs and didn't find any helpful examples or links using Google or AltaVista. ...
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Dennis Clark
dlc@...
Mar 2, 2001 5:50 am
Funny, I found a dozen links on google.com that did a very good job of describing RS485 multi-drop serial. DLC ... -- ... * Dennis Clark Mechanical...
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Tony Brenke
trbrenke@...
Mar 2, 2001 7:08 am
I am using RS485 on my robot with bx-01's acording to the docs: For long distances, BasicX chips are made to interconnect using a standard RS-485 transceiver...
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Tony Brenke
trbrenke@...
Mar 2, 2001 7:11 am
I would be intrested in how far you get the serial data to go. ... ===== Tony Brenke North Tacoma, WA __________________________________________________ Do You...
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Vic Fraenckel
vfraenc1@...
Mar 2, 2001 11:55 am
Perhaps we could expand this thread to include some speculation on how many angles can dance on the head of a pin. I do not believe this question has ever been...
5505
gtbecker@...
Mar 2, 2001 1:19 pm
... Apparently beating a dead horse, I am. Alas. Accuracy is important; algorithmic correctness is more important. Here, anyway. Tom Becker --... ...-- The...
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JohnEly@...
Mar 2, 2001 5:18 pm
Hello, I noticed that when I made a copy of a working program that the copy would not compile because it couldn't find a task I had written. The problem is now...
