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2004-12-16 by Bernd Felsche
On Thursday 16 December 2004 01:39, Jeffrey Engel wrote: > --- Bernd Felsche > wrote: > > I'm considering all sorts of low-power options for providing an > > analogue indication (moving needle or bar). Typical ammeters > > draw current and the quantity I want to indicate isn't di
2004-12-15 by Graham Davies
--- In AVR-Chat@yahoogroups.com, James Washer wrote: > When I look through my DigiKey > catalog, I see a bewildering > choice of crystals. Picking > the "speed" is easy, but how > do I choose amongst the > different "series", and type? I buy my cystals from Mouser, where they are
2004-12-15 by Jim Wagner
Yes, its a challenge. After frequency, the next thing is "series or parallel". The normal processor crystal oscillator with two caps (whether external or not) is a "parallel". The ONLY difference in the crystals is the way the crystal is calibrated. If you choose the wrong one, i
2004-12-15 by James Washer
When I look through my DigiKey catalog, I see a bewildering choice of crystals. Picking the "speed" is easy, but how do I choose amongst the different "series", and type? - jim
2004-12-15 by Mike Murphree
Bernd Felsche said: > > I'm considering all sorts of low-power options for providing an > analogue indication (moving needle or bar). Typical ammeters draw > current and the quantity I want to indicate isn't directly available as > a current... it's number-crunched. Scale will be
2004-12-15 by Jeffrey Engel
Have you considered LED's? If they would work in your application, they'd be easier to prototype, respond more quickly and probably less expensive. Several times, I've thought about using a stepper as a Tach indicator, but the LED's response speed is too large an advantage. An RC
2004-12-15 by Gert Mueller
Bernd, those servos draw quite a lot of current - especially while they move, are we talking of some 200 mA or so - in that respect a classic ammeter would be the better choice I guess. Cheers, Gert Mueller ----------------------------------------------------------- Datentechnik
2004-12-15 by KEN HUNT
If you want low power how about a graphical LCD display (mobile phone display for example) emulating a needle or a moving bar? A Nokia 3310 LCD (for example) would give you 48x84 pixels for not a lot of money. ken --- Bernd Felsche wrote: > > I'm considering all sorts of low-powe
2004-12-15 by Bernd Felsche
I'm considering all sorts of low-power options for providing an analogue indication (moving needle or bar). Typical ammeters draw current and the quantity I want to indicate isn't directly available as a current... it's number-crunched. Scale will be semi-log. At first, I looked
2004-12-15 by Leon Heller
----- Original Message ----- From: "Bernd Felsche" To: Sent: Wednesday, December 15, 2004 4:06 PM Subject: [AVR-Chat] Radio servo for analogue indicator? > > I'm considering all sorts of low-power options for providing an > analogue indication (moving needle or bar). Typical amme
2004-12-14 by Paul Maddox
Joe, > my company web-site = www.baite-group.com good music, I could boogy to this all night. I'll be sending you an email off list shortly with a request. Paul
2004-12-14 by Brian Dean
On Mon, Dec 13, 2004 at 06:47:22AM -0800, Larry Barello wrote: > One last tid-bit: the reset line has no protection diodes to V+ This > is the only pin without protection since it needs to be able to > respond to +12v for parallel programming mode. > > For most situations this is
2004-12-14 by Joe Tsang
Thanks for interest in me and my company ! FYI: my contact = ic_source_joe@yahoo.com my company web-site = www.baite-group.com pls kindly contact me because: 1. I am one of the few salesman in my company speak and write English better 2. most of the salesman in my company mainly
2004-12-13 by Mark Jordan
On 13 Dec 2004 at 17:53, Dave Mucha wrote: > > > --- In AVR-Chat@yahoogroups.com, Joe Tsang wrote: > > Thanks Graham for such detailed report !! > > > > I am just a simple Atmel IC salesperson (from an authorized > > Atmel reseller) that sells genuine Atmel parts in hopefully > >
2004-12-13 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, Joe Tsang wrote: > Thanks Graham for such detailed report !! > > I am just a simple Atmel IC salesperson (from an authorized > Atmel reseller) that sells genuine Atmel parts in hopefully > reasonable price and in hopefully reasonable qty (say, min
2004-12-13 by Larry Barello
One last tid-bit: the reset line has no protection diodes to V+ This is the only pin without protection since it needs to be able to respond to +12v for parallel programming mode. For most situations this isn't a big deal, but most people simply run that line out to their ISP hea
2004-12-13 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "DG (dee-gee)" wrote: > I'm reacting to this > childish thing ... Your reaction is not unjustified, but please, for the benefit of the group, state your counter-arguments in clear, calm language. Insults and counter-insults have absolutely no plac
2004-12-13 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Dennis Kazar" wrote: > Were any of the parts Atmega168? No. I got a bunch of ATmega16L-AI for my AVR ICE-Cube product and a selection of ATmega162 and ATmega32L for various purposes and my spares drawer. Joe was flexible about minimum quantity be
2004-12-13 by Larry Barello
Check the schematic for the chip in the manual: they show an internal pull-up on that line. (fig 22, reset logic). Same for the reset line - you can leave it unconnected if you are using the internal BOD. This is true for all the modern AVR's (not so for the very first batch of c
2004-12-13 by Paul Maddox
Larry, > Check the schematic for the chip in the manual: they show an internal > pull-up on that line. (fig 22, reset logic). neat. > Same for the reset line - you can leave it unconnected if you are using the > internal BOD. This is true for all the modern AVR's (not so for the
2004-12-13 by Paul Maddox
Dave, > >do i just connect /PEN pin to 4K7 resistor and VCC??? > /Program ENable Enables programming when low. > Tying it high would maybe be a mistake, maybe not. I disagree, unused pins should be taken high via a resistor.. you wouldn't want that pin bouncing to a zero level wh
2004-12-13 by Joe Tsang
Thanks Graham for such detailed report !! I am just a simple Atmel IC salesperson (from an authorized Atmel reseller) that sells genuine Atmel parts in hopefully reasonable price and in hopefully reasonable qty (say, min. 10 or 20 pc etc...). I welcome anyone's email to me. Thank
2004-12-13 by DG (dee-gee)
> PEN stand for Parallel Programming Enable if you're not going to Well, Atmel doc2467.pdf, Page 7, says the following: --(citation) PEN is a programming enable pin for the SPI Serial Programming mode. By holding this pin low during a Power-on Reset, the device will enter the SPI
2004-12-13 by wbounce
Struggling with the same issues I found this in the data sheet --------- data sheet page 304 ---------- To program and verify the ATmega128 in the SPI Serial Programming mode, the following sequence is recommended (See four byte instruction formats in Table 145): 1. Power-up sequ
2004-12-13 by Lasse Madsen
Hi Ridho , Tie PEN to your supply (high) no need for a series resistor that’s just a waist of money… The company I worked for had around 150.000 pieces of a product running all around the globe at the moment in all sorts of environments and it hasn’t failed so far with the PEN be
2004-12-12 by Ridho Alpha
so....i am now using SPI programming using In-System Programming and i use external reset.......so, i have to tie this /PEN pin to the ground????is it true???? Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now
2004-12-12 by Tony Vandiver
The reading and writing processes are similar in terms of the hardware requirements on the SPI bus. If you can read from the chip, you had to be able to write from the programmer's MOSI to the targets MOSI, and you had to be able to read from the target's MISO to the programmer's
2004-12-12 by wbounce
I am experiencing a similar problem My currently loaded program uses portb pin 0 SS and so it is setting this improperly and causing me not to be able to program the board. I posted a question somewhere else. Hopefully someone will have an answer. -----Original Message----- From:
2004-12-12 by beaver
12 grudnia 2004, 18:27 I've simple spi programmer. I've successfuly programmed mcu (atmega8) several times (about 20), but today I had to change something in it and I've accidently changed MISO and MOSI lines. I've tried to write the mcu but of course it didn't work. I've found t
2004-12-12 by DG (dee-gee)
If you are using SPI programming mode you shoud tie this pin to the ground. When /PEN is low, chip will enter SPI programming mode during reset. /PEN has no function during normal operation. Although I'm using JTAG programming mode, I'm keeping /PEN tied to Vcc anyways, via 10K r
2004-12-12 by Dave VanHorn
At 09:56 PM 12/11/2004, Ridho Alpha wrote: >hello... > >i am starting to use ATMEGA128 right now..but i am a bit confused what >/PEN pin is for??? how do use it??? > >do i just connect /PEN pin to 4K7 resistor and VCC??? See the Datasheet! /Program ENable Enables programming when
2004-12-12 by Ridho Alpha
hello... i am starting to use ATMEGA128 right now..but i am a bit confused what /PEN pin is for??? how do use it??? do i just connect /PEN pin to 4K7 resistor and VCC??? please give same clues... thank you Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Down
2004-12-12 by Dennis Kazar
Were any of the parts Atmega168? Having a big problem since they have just been released, especially in DIP to use in STK500. Dealing with both Rep and Disty. D ----- Original Message ----- From: "Graham Davies" To: Sent: Saturday, December 11, 2004 8:01 PM Subject: [AVR-Chat] Re
2004-12-12 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Joe Tsang wrote: > I am authorized Atmel re-seller > Anyone interested ? > [for example prices, see Joe's post] In case anyone in this group is thinking of ordering MCUs from Joe, I will report on my experience. Joe is associated with Baite Group,
2004-12-11 by Robert Adsett
At 11:10 PM 12/10/04 -0800, you wrote: >thanks robert, i will try it. if IR2110 can isolate 500V then i can save >my optocouplers.. >i have attach my first hbridge cct without using ir2110.i only need to >switching Q1 or Q2 but not the both at the same time. > >i am using bascom
2004-12-11 by Dave VanHorn
At 07:26 AM 12/11/2004, Andrew Lim wrote: >I guess the code that John suggested will work very well when more data is >needed to be tranfered. Thanks guys. :) Yup, I was going to suggest the same thing. Problem is, you're into a minimum of four instructions to set up the pointers
2004-12-11 by Andrew Lim
I guess the code that John suggested will work very well when more data is needed to be tranfered. Thanks guys. :) Regards, Andrew Dave VanHorn wrote: At 11:43 PM 12/9/2004, John Samperi wrote: >Actually it's not shorter :-((.... but it would be shorter if you had lots >more data
2004-12-11 by kc wong
thanks robert, i will try it. if IR2110 can isolate 500V then i can save my optocouplers.. i have attach my first hbridge cct without using ir2110.i only need to switching Q1 or Q2 but not the both at the same time. i am using bascom AVR 1.11.7.4 with AtMega8535 chip i use this h
2004-12-10 by Robert Adsett
At 10:21 PM 12/9/04 -0800, you wrote: >hi robert: >sorry, i skip some description.my motor is a linear synchronous motor(LSM) > >(1) first i do a single phase hbridge cct which use 2 pchannel(high side) >n 2 nchannel(low side) power mosfet.left high side mosfet(drain) is >connect
2004-12-10 by Dave VanHorn
At 11:43 PM 12/9/2004, John Samperi wrote: >Actually it's not shorter :-((.... but it would be shorter if you had lots >more data to move. Perhaps there is a genius out there with a better >solution :-)) Some things just are clunky.
2004-12-10 by kc wong
hi robert: sorry, i skip some description.my motor is a linear synchronous motor(LSM) (1) first i do a single phase hbridge cct which use 2 pchannel(high side) n 2 nchannel(low side) power mosfet.left high side mosfet(drain) is connected to gate of right low side mosfet. right hi
2004-12-10 by John Samperi
At 06:52 PM 9/12/04 -0800, you wrote: > Hi guys, Is there anyone who can make this code more efficient? Use 2 of the index registers as pointers with auto increment. May not save much as your routine is only 10 words long. TSM_Curr2Ptr: ldi counter,5 ;a register such as r17 ldi x
2004-12-10 by Robert Adsett
At 07:15 PM 12/9/04 -0800, you wrote: >dear all: > >i m using bascom AVR and AtMega8535 chip to program to switching the 4 >mosfet on off in a Hbridge cct. i want to generate ac squarewave output >from the Hbridge cct but i cant get it because it look like not square >completely.
2004-12-10 by kc wong
dear all: i m using bascom AVR and AtMega8535 chip to program to switching the 4 mosfet on off in a Hbridge cct. i want to generate ac squarewave output from the Hbridge cct but i cant get it because it look like not square completely.the output is to control a motor(15V 2A) in 5
2004-12-10 by Andrew Lim
Hi guys, Is there anyone who can make this code more efficient? I'm running out of code space and wish that I can shink this piece of code further. I'm using this concept 3 times in my program which eats up a lot of space. If anyone can make it flexible it will be GREAT !! Thanks
2004-12-09 by David Jones
>>> 10/12/2004 4:00:39 am >>> >Then I came across the AVRs. Seemed like they were as good or better >in most cases but both would do the jobs I had in mind. The selling >point, being a hobbiest price of all the tools, both hardware >(STK500) and software (AVR Studio, GCCAVR and C
2004-12-08 by brewski922
3 or 4 years ago when I got into microcontrollers the first one I came across was the PIC lineup. Done some research on them, printed out datasheets and such but bought anything for the PICs. Then I came across the AVRs. Seemed like they were as good or better in most cases but b
2004-12-08 by Jeronimo Avelar Filho
Hi List , Thanks for the suggestions , hints and links . I will start my project and as soon as possible will give a feedback to you . Jeronimo Jesper Hansen wrote: Manchester coding is not really necessary. The Nordic VLSI chips can be direcly connected a microprocessor UART. I'
2004-12-08 by Dingo
AVR has a free C compiler. As a hobbyist free is important. The only freely available PIC compilers are demos of commercial ones and the limitations always get in the way. http://winavr.sourceforge.net/ ----- Original Message ----- From: Zack Widup To: AVR-Chat@yahoogroups.com Se
2004-12-08 by Astria Nur Irfansyah
I agree. I choose AVR mostly because of the speed. Among the common micros (8051,AVR,PIC,motorola), there are some applications where only AVRs can do the job directly (e.g. video signal generation). It is the fastest micro i can find here (my country). Secondly, i choose AVR's b