I'll work on it but I only have another day at my remote outpost in British
Columbia. When I leave the problem goes away. Getting the voltage isn't
necessary. It just would be nice to see it from a thousand miles away.
Thanks for your input.
Peter
On Sat, Feb 21, 2015 at 1:42 PM, Jan Kandziora wr
Am 21.02.2015 um 21:21 schrieb Peter Hollenbeck:
>
> The higher the value the lower the output.
>
This usually means there already is a voltage divider (or at least a
parallel resistance) in the measurement device and you are superposing
another. You could measure it and calculate the outer pair, b
I get it. Thanks.
On Sat, Feb 21, 2015 at 12:10 PM, Colin Reese wrote:
> I mean that with a divider of 2.2k + 10k, 10V at the midpoint corresponds
> to 12.2V across the entirety. Similarly, 4.7k+10k will give you 14.7 / 10 *
> 10V = 14.7V range (10V at midpoint is 14.7V across entirety).
>
> C
>
I don't get it and doubt I ever will. I have been wrestling with this for
ages.I used to be a halfway decent programmer. Thankfully I didn't try
electronics.
I read online that equal resistor values will halve the voltage reading,
Exactly what I want. Bring it down from 12 to 6 so the MS-TV will h
I mean that with a divider of 2.2k + 10k, 10V at the midpoint corresponds to
12.2V across the entirety. Similarly, 4.7k+10k will give you 14.7 / 10 * 10V =
14.7V range (10V at midpoint is 14.7V across entirety).
C
> On Feb 21, 2015, at 11:53 AM, Peter Hollenbeck wrote:
>
> Colin,
> Sorry a
Colin,
Sorry about my feeble attempt at ASCII art. My divider consists of two
connected 1K resistors. Battery plus and minus are connected at the ends.
MS-TV red wire connected at the center. MS-TV black wire connected at same
place as battery minus.
I will try your suggestion. What do you mean "a
The MS-TV is here: http://www.ibuttonlink.com/products/ms-tv
It uses a DS-2438Z .
It has only a red wire and a black wire, no green or blue.
Peter
On Sat, Feb 21, 2015 at 11:35 AM, Gregg Levine
wrote:
> Hello!
> Makes sense to me. But then I'm not familiar with how your sensors work.
>
> But wha
I unfortunately cannot read your ascii art, which in itself is disappointing.
2k is a bit low for a divider - you'll get standby current of 6mA. You should
also try optimizing the split to fit the range you can measure. So you'd want a
ratio of R2/Rtotal =measured range/ measurable range. So 2.
Hello!
Makes sense to me. But then I'm not familiar with how your sensors work.
But what's that green wire doing, and also that blue wire doing?
-
Gregg C Levine gregg.drw...@gmail.com
"This signature fought the Time Wars, time and again."
On Sat, Feb 21, 2015 at 2:29 PM, Peter Hollenbeck w
I am using a LinkUSB and an MS-TV to read voltage from a 12 volt system.
The MS-TV is limited to 10 volts so a made a voltage divider. I know next
to nothing about electronics. Two weeks ago, with a test 12v power supply I
played with various resistor values, from 1K to 1M. The 1K resistors
appeare
Johan Ström:
> Is your 8Mhz operation working perfectly fine?
I didn't yet test it on a longer wire, but in the testbed it works fine if
you turn off the low-level debugging code.
> I've had some issues with
> 8Mhz in my code-base, where the pull-low does not respond fast enough
> after a 60us
Writing slave code is quite easy, in fact. Most of the infrastructure is
built into macros.
Take a look at any similar slave e.g. modules/owlib/src/c/ow_2406.c
You add entries in the big structure near the top for the new properties,
include the name, type, length , read and write functions and p
Am 21.02.2015 um 08:08 schrieb Matthias Urlichs:
>
> Or the capacitive sensors I want to use (can the BAE0911 even do
> that? an atmega supports them without any additional hardware).
>
You mean a capacitive keyboard? That's only software, on any µC.
The only difference between AVR and any other
Hi Matthias!
Nice to see continued work on the original (smurfix/)owslave code. I've
got some similar code, forked from the taliesin fork originally form
your code (according to githubs network view). Your code (today) is
definitely smaller than what I've got now. I think I've tried yours way
Am 21.02.2015 um 08:08 schrieb Matthias Urlichs:
> Jan Kandziora writes:
>
>> I strongly recommend to use Pascal Baerten's BAE0911 device instead of
>> developing a slave on your own.
>
> I already _have_ a slave of my own. (AVR-based; writing code that talks to
> 1wire is as simple as it gets wi
Am 21.02.2015 um 04:49 schrieb Gregg Levine:
> Hello!
> Okay it works as expected with the chosen components to support
> debounce. Oh and I used a magnetically triggered mechanical switch to
> try it.
>
> Next question, can you Jan supply me with a copy of your software? As
> it happens I'd like
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