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Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.
We found 158 threads matching "avr"
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The most relevant threads are listed first
avr-gcc floating point problems
linnix - 2010-03-18 13:47:00
In response to another thread, I am still getting these problems with
WinAVR 2010. I think the linker is hitting some AVR limits. There
are similar reports on the web as well.
-------------------------------------------------------------------------------------------------
unsigned char u;
...
Denon AVR 1709 vs Denon AVR 1909
Skybuck Flying - 2009-08-14 15:12:00
Hello,
The salesman offered me a discount on the AVR 1909 which he has "in store"
literally lol... it's the display model. He offered me this deal... the
model has been on in the store for a while I presume he claimed he never
really used it or put it on... because he mostly used another re...Re: Battery Charger Design
thorin92 - 2010-01-06 08:38:00
In the application, the output of the battery is regulated by an LDO
Voltage Regulator before powering the AVR, so the AVR supply is of no
concern.
The DC supply for the charger will be heavily filtered and regulated,
powered from a mains transformer.
I do not wish to use an AVR to manage c...Re: Help with power issues
linnix - 2009-03-31 20:54:00
On Mar 31, 4:38 pm, Eeyore
wrote:
> linnix wrote:
> > Back to the main issue. I am just wanting to make sure that the op
> > amp output won't go beyond Vcc2, since it is running at higher Vcc1.
> > In theory, the output should be 1.5V less than Vcc1.
>
> That's another story alto...Denon Receiver AVR 1909 seems to loose "volume/power/wattage" when using headphones ?!?
Skybuck Flying - 2010-04-02 10:24:00
Hello,
The Denon AVR 1909 seems to loose "volume/power/wattage" when my headphone
is plugged in...
The "hole" where the plug goes is a big one... so I need to use an extension
plug... which goes from the little PC headphone like plug to a bigger
plug...
It am not sure if that is the c...PIC/AVR internal RC oscillator stability
2008-12-17 19:38:00
The datasheets I read on the PIC MCU says the precision is 2% for most
common voltage and temperature ranges (and 1% for the sweet spot).
I assume the AVR MCUs have similar characteristics.
This should mean that for say 10 clock periods at 4 MHz the period would
vary between 2450 - 2550 ns?
...Atmel AVR development tools
dbvanhorn - 2008-01-31 13:51:00
Frustrated, not knowing where to turn with this.
I love the AVR processors. Very clean internally, nice to write code
for.
But, I am on the edge of dumping them due to severe problems with
their dev tools.
Some people seem to have no trouble with them, but I've been having
problems fo...Denon AVR 1909 preliminary review ;)
Skybuck Flying - 2009-08-16 20:29:00
Ok,
So far I listened to the Denon AVR 1909 with GigaWorks S700/S750 speakers...
(Ext In. Analog, Out analog)
It's night at the moment so only softly.
Only 5 speakers have been connected or are in use.
The 6th is connected by not using it for now.
Still need cable for the 7th.
(Al...please help
hossam - 2009-01-05 03:48:00
Dear,members
i need this e-book in english version
the book name is : embedded c programming and the atmel avr
regards,
hossam
...Re: The Art of Electronics
Tim Harig - 2009-07-02 03:00:00
On 2009-07-02, mJ wrote:
> "The Art of Electronics" 3rd edition
I purchased on of the versions of that book a long time ago; but, I found
it to be weak. It gives you a decent start but it doesn't provide any
practical real word grounding.
> Any other resources for a Hobbyist( Pure Mat...Re: Convert 12-14 vdc to 9 vdc for a device only needing 0.3ma...
linnix - 2008-12-30 15:04:00
On Dec 30, 10:46=A0am, Jan Panteltje wrote:
> On a sunny day (Mon, 29 Dec 2008 23:20:01 GMT) it happened mzen...@eskimo=
.com
> (Mark Zenier) wrote in :
>
>
>
> > If it's a 7106 or 7126 type chip, I think that you can use a 3 resistor
> > divider to measure it's own voltage. =A0B...uP hobbyist kits
JosephKK - 2010-02-04 22:11:00
I am looking for enough kit to do maybe two or three projects for PIC and=
AVR. =20
Target price, about $100 for each vendor. Works in Linux or Linux/wine =
preferred.
Also some small LCD displays if not included. I can go higher $ but =
prefer not to.
...Re: bandgap voltages
linnix - 2008-03-04 11:42:00
On Mar 4, 8:32 am, John Larkin
wrote:
> Why are all the bandgap pseudo-zeners 1.25 volts or more? Is there
> something in the physics that prevents them from being any lower?
>
> John
The AVR internal bandgap is 1.1V. So it should be possible with a
discrete.
...Re: Charging NiMHs
linnix - 2008-03-12 12:45:00
On Mar 12, 8:33 am, mrdarr...@gmail.com wrote:
> I've come to the conclusion that the cheap NiMH chargers I've got are
> suboptimal. The batteries tend to get quite warm at the end of the
> charging cycle,
That's how you determine the termination of charging. It could easily
be monitored...Re: Anyone have a copy of Tellegen's gyrator paper?
2008-05-21 06:10:00
On 18 avr, 22:57, "Joel Koltner" wrote:
> This one: B.D.H. Tellegen, "The Gyrator, a New Electric Network Element,"
> Philips Research Reports 3, 81 (1948).
>
> Phantom?
>
> ---Joel
Hello
I am also searching this document, but it is not available anymore on
ABSE;
could you, plea...Measuring DC current.
TheM - 2008-06-26 05:59:00
This is not the sort of thing I don't usually do so I'll ask here:
What's the easiest and relatively cheap way of measuring
high side DC current (0-30/50A, say 10% accuracy).
Preferably without using any drop resistors. I found hall sensors,
any advice from users of these?
It has to be is...Cheap AVR development board
Ivan Matacic - 2008-09-07 06:11:00
I would like to start with Atmel AVR's, so I need some cheap development
board. Something like this:
http://www.futurlec.com/ATMEGA8535_Educational_Board.shtml, max 100 USD.
Do you have any recomendation?
--
www.elektronka.com
...Re: c programming of microcontrollers
JeffM - 2008-02-10 15:35:00
Marra wrote:
> microchip.com
> No 8051's but some great microcontrollers.
Widely considered to be the most C-hostile environment:
http://groups.google.com/group/comp.arch.embedded/browse_frm/thread/bb937f3ec4d7bce5?q=what-portion-of-*-ISO-C-*-is-*-*-supported+Very-few+AVR-tiny-*+PIC12+reentran...Re: 556 dual timer problem
Jan Panteltje - 2009-12-04 16:53:00
On a sunny day (Fri, 4 Dec 2009 21:21:37 -0000) it happened "TTman"
wrote in :
>
> "Jan Panteltje" wrote in message
> news:hfbf0c$7ed$1@news.albasani.net...
> > On a sunny day (Fri, 04 Dec 2009 16:43:05 +0000) it happened Ian Bell
> > wrote in :
> >
> > > I have used a 55...Combo CPLD + uController - Any devices other than Atmel FPSLIC parts?
Jim Flanagan - 2008-05-09 17:30:00
Does anyone know if there is an alternative device similar to
the Atmel FPSLIC (AVR +FPGA)? I would like something like
an 8051 derivative that has some built in configurable programmable
logic. The Atmel parts are nice, but overkill for my application.
They are also somewhat expensive. My ...Re: *Opinions* re: MCU vendors
linnix - 2010-01-17 17:13:00
On Jan 17, 2:16=A0pm, D Yuniskis wrote:
> Hi,
>
> I'm looking at a couple of different parts from Atmel
> and TI for an upcoming design. =A0I'd appreciate comments
> (not *rants*) folks might have about both firms in terms
> of:
> - quality of their products
> - accuracy of their ...Re: Battery Charger Design
JosephKK - 2010-01-08 18:24:00
On Wed, 06 Jan 2010 07:15:22 -0800, mike wrote:
> thorin92 wrote:
> > In the application, the output of the battery is regulated by an LDO
> > Voltage Regulator before powering the AVR, so the AVR supply is of no
> > concern.
> > =20
> > The DC supply for the charger will be heavily f...Re: MOSFETS in parallel in switchmode improves effciency?
Vladimir Vassilevsky - 2009-02-24 21:23:00
Jan Panteltje wrote:
> I think I can do the secondary controller for the MOSFET with a PIC 16F690, using its hardware comparator, and doing
> the 'hold' delays in the interrupt :-)
Fie, shameful PIC.
BTW, I control the 1.5KW SMPS with AVR. Synchronous rectification, PFC
bridge, pro...pico power op amp suggestion pls
TTman - 2009-03-22 05:43:00
I'm looking for a low power op amp, single , surface mount to act as a
voltage follower to drive an ADC on an AVR processor 3V supply.SOT323 or
similar, not SOIC8.Accuracy and rail to rail is unimportant as it's only
measuring battery voltage - 3V lithium cell. 5% accuracy is plenty good
eno...Velodyne CHT-Q8 powered subwoofer for apartment ?
Skybuck Flying - 2010-01-31 09:16:00
Hello Guys,
I am wondering what a good "powered" subwoofer replacement for the creative
labs gigaworks s750 would be ?
These ones look nice but I am not sure:
http://www.velodyne.com/products/product.aspx?ID=39&sid=872y917k
According to the RMS rating the CHT-12Q would be equivalent......Re: TMS320C6474
Vladimir Vassilevsky - 2008-11-24 17:52:00
john wrote:
> Hi,
>
> I am looking for inexpensive cross C cross Complier, Simulator,
> Emulator and Dev. board for TI DSP TMS320C6474.
>
> Please advice!
My dear friend,
If the cost of the compiler/simulator/dev. board for TMS6474 is a
problem for you, that simply means...Re: What is happening to Atmel EEPROMs?
TheM - 2010-03-26 09:52:00
"Spehro Pefhany" wrote in message news:5elnq5d2ncjvs91v1cu5dmt5tbntuhefg3@4ax.com...
> On Thu, 25 Mar 2010 13:19:46 -0800, "Bob Eld"
> wrote:
>
> >
> > "Peter" wrote in message
> > news:9lhmq5plg1gr3sduo9n52mdi5g6iiqucqc@4ax.com...
> > > They have doubled their prices and the le...Power Supply Regulation
Suudy - 2008-04-07 13:34:00
I want to tap into the power of a circa 1980 digital board to power my
own board. My question is whether the 5V coming from this old board
is clean enough to use directly or if I should add my own power
management circuitry.
The device is powered from 120Vac, goes through a transformer to ste...Oscilloscopes
RogerN - 2010-02-07 16:31:00
What's the best scope to get for the money for mostly digital circuits?
I'll have some analog but nothing real high frequency, like analog
connections to the microcontroller, maybe some SMPS circuits. I was looking
at some microcontroller and fpga designs that you can get kits starting at
...Re: divide-by-N
Ben Jackson - 2009-08-26 14:25:00
On 2009-08-26, linnix wrote:
>
> Might be difficult to do 10MHz with a PIG^hC.
Not that it's the best solution, but if you use the input as the PIC's
clock and make the main loop something like:
set up pwm
while (1) {
read dip switches
update pwm control regs
}
Well, PIC ...Re: Artificially extend switch closure time
amdx - 2009-01-28 14:55:00
"Ben Jackson" wrote in message
news:slrngo1c42.2nrg.ben@kronos.home.ben.com...
> On 2009-01-28, Gabe Knuth wrote:
> > Unfortunately, I can't reprogram the matrix processor, and I don't
> > really want to get into programming my own microcontroller to handle
> > this
>
> If you ...will a 250w monitor run in a new 500w power source?
2009-01-19 20:02:00
i dont have an avr, so i just plug my monitor directly to the cpu's
250w power source.
if i use a new power source for 500w, will the monitor run or will i
have electrical problems?
...Microchip (and On Semi) to buy Atmel
David L. Jones - 2008-10-02 20:02:00
AVR freaks must be shedding a tear...
http://www.eetimes.com/showArticle.jhtml?articleID=210605347&cid=NL_eet
and
http://www.eetimes.com/showArticle.jhtml?articleID=210605347&cid=NL_eet
Dave.
...Re: Hi-Tech Software bought by Microchip - no more other compilers
larwe - 2009-07-09 10:24:00
On Jul 9, 8:26=A0am, David Brown
wrote:
> easily available, even within professional markets. =A0They (or third
> parties) can profit from charging for /better/ tools - but only
> providing bad tools for free is, IMHO, a silly strategy.
Really, you're ignoring a 500-pound gorilla. The...Re: High-output, low-duty cycle LED strobe circuit
mj - 2009-05-04 11:54:00
On May 4, 7:52=A0am, Jan Panteltje wrote:
> I have exactly that here, made it for strobe tests.
> White LED too, uses an 8 pin PIC, and 2 transistors to get some high curr=
ent.
> Want the asm source? Could perhaps still find it.
Actually, it's the circuit to pump current through thos...Re: XO controlled 480Hz Oscillator
Tim Wescott - 2010-02-02 12:56:00
On Tue, 02 Feb 2010 09:47:50 -0800, Chris wrote:
> > The simplest way is MCU with external crystal. For 480 Hz output, the
> > crystal is likely to be a multiple of 3 MHz. The 12.0 MHz would be the
> > most common.
>
> Is an MCU the same as a PIC?
All PICs are MCUs. Not all MCUs are...HD44780 problem
Marco Trapanese - 2008-08-14 10:42:00
Hello
I'm puzzling over my own HD44780 library for Luminary ARM. I ported the
code from a working library I use with AVR.
I see some activity with the oscilloscope and the signals seems ok. The
LCD replies as expected. But I can see nothing on the display.
I remember I should see the pi...Re: Controlling relays over internet
2008-03-17 13:36:00
srj8219 wrote:
> Hello friends,
> I have come across a small problem in which I need to control a relay
> over the internet. The concept is that if I press a switch from my
> home, a relay in my office should switch on. I know that there are
> some small embedded webservers out there which...Re: Special AND-gate
Jamie - 2008-04-06 10:04:00
Bernd Schneider wrote:
> Hi,
>
> I am looking for a way to design a boolean AND-gate (with possibly many
> inputs) that consists of several standard AND, XOR, NOT, randomness gates
> and has the following properties:
> 1. On input a,b it output a AND b
> 2. The encoding to present a...Using ISR() Macro in AVR-GCC
Vivek B - 2008-02-22 06:01:00
Hi folks,
My code is handling both timer0 interrupt and SPI interrupt. And I
don't want to loose any of the SPI interrupts and hence thought of
making the timer0 ISR to work in NOBLOCK mode. But when i use
ISR(TIMER0_COMP_vect, ISR_NOBLOCK)
{
/* Code */
}
the compiler gives an error:...