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2005-01-24 by brewski922
On the AC side Connect the High, hot, black wire to one wire of the transformer input. Connect the Low, neutral, white wire to the other wire of the transformer input. Connect the Ground, green wire to the metal cabinet. Mount the transformer to the metal cabinet. It would be bes
2005-01-24 by Zack Widup
Yes, I always connect the center pin green ground lead to the metal case, along with the DC ground connections. It's probably a good idea to ground the transformer case also, but sometimes not as easy to do and not necessary. If you don't ahd have hum problems, then try it and se
2005-01-24 by Leon Heller
----- Original Message ----- From: Randy & Zonya Ledyard To: AVR-Chat@yahoogroups.com Sent: Monday, January 24, 2005 8:25 AM Subject: RE: [AVR-Chat] OT - Grounding Question James I was referring to the "green" ground wire, not neutral - I'm planning on using a 3-prong plug for th
2005-01-24 by Roy E. Burrage
Randy, That green wire is your ground. All of your ground returns ought to be connected to it, as well as the transformer casing which would be automatic is you ground the case of your enclosure...assuming you're using a metal enclosure. The white wire, neutral line, is also tied
2005-01-24 by Randy & Zonya Ledyard
James I was referring to the "green" ground wire, not neutral - I'm planning on using a 3-prong plug for the input - the hot and neutral run to the primary on the transformer, but I'm confused about where the AC ground should go... Should that AC ground be tied to the case and to
2005-01-24 by James Washer
I'm sure lots of folks will have lots to say about this... but let me just ask a question of you first. When you say "ground from the 100 VAC" do you mean "ground" or "neutral". i.e. Are you using a 3-pronged-ground-lug plug, or the more conventional two-pronged plug, which has n
2005-01-24 by Randy & Zonya Ledyard
Basic question about grounding here, couldn't find the answer on several schematics I looked at, so I thought I'd ask it here, so the experts can set me straight. I putting together a power supply for my son, to power several of his guitar effects boxes, and I had a question abou
2005-01-23 by Franco
Hi!! I buy a Zire 21 from Palm, this device have a realy big procesor but the palm developers forgets about us. Don't have Serial Port!! only a USB and a IRDA port. Now IRDA port isn't connected to the serial device of the palm and emulate the IRDA protocol in a software layer li
2005-01-22 by Franco
Hummm, it's a problem becose you have a big Vcc to get down to 24Vcc, the angle of the square signal is too small i'm think. Other solution is use a transformer and modulate the input of this to obtain the 24Vcc. Why don't use a power souce from a Tv or VCR? that power sources do
2005-01-21 by Kathy Quinlan
Franco wrote: > why a new power source? i'm using some PC sources, if > this are modified you can use in any output you need. > > in the net you have some modification to this to make > a comminucation power source, general this are about > 13,8V and 15 Amps or more. > > The only
2005-01-21 by Franco
why a new power source? i'm using some PC sources, if this are modified you can use in any output you need. in the net you have some modification to this to make a comminucation power source, general this are about 13,8V and 15 Amps or more. The only thing you need to do is chang
2005-01-21 by Russell Shaw
Kathy Quinlan wrote: > Hi all, > > I am resurecting an old project atm and I need to build a powersupply, > it will take in an average of 120Vdc (from ~100 - 160Vdc) and provide > regulated 24V and 5V rails. Total wattage around 60W. > > I chose the uc3842 SMPS controller as the
2005-01-21 by Leon Heller
----- Original Message ----- From: Kathy Quinlan To: AVR-Chat@yahoogroups.com Sent: Friday, January 21, 2005 1:51 PM Subject: [AVR-Chat] OT Magnetics design problems Hi all, I am resurecting an old project atm and I need to build a powersupply, it will take in an average of 120Vd
2005-01-21 by Graham Davies
--- In AVR-Chat@yahoogroups.com, James Washer wrote: > I'm just starting to play with > the ADC ... Are 1% resistors > what everyone uses ... Are you sure this is what you want to know? In my case, yes, I use 1% resistors in analog circuits around the ADC. But your needs may be d
2005-01-21 by Kathy Quinlan
Hi all, I am resurecting an old project atm and I need to build a powersupply, it will take in an average of 120Vdc (from ~100 - 160Vdc) and provide regulated 24V and 5V rails. Total wattage around 60W. I chose the uc3842 SMPS controller as the regulator. I am trying to work out
2005-01-21 by Dave VanHorn
At 07:43 PM 1/20/2005, James Washer wrote: >I'm just starting to play with the ADC capabilities of the AVR... Are 1% >resistors what everyone uses, or do I need something more precise? It all depends.. There's all kinds of fun to be had in precision land, but remember, every resi
2005-01-21 by James Washer
I'm just starting to play with the ADC capabilities of the AVR... Are 1% resistors what everyone uses, or do I need something more precise? - jim
2005-01-21 by Jim Wagner
It depends on the accuracy YOU need. There are several factors that contribute: 1. The referemce 2. The ADC conversion accuracy 3. The external circuit accuracy If you use all 10 bits, then you can resolve 1 part in 1000, basically. But, if you use the internal reference, you are
2005-01-20 by Dave Hylands
Hi Jose, Avrlib http://hubbard.engr.scu.edu/embedded/avr/avrlib/ includes code for i2c master and slave, both interrupt driven and not, as well as many other tidbits of functionality. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ > -----Original Message----- >
2005-01-20 by Jose Fuentes
I want to use a atmega64 as a TWI slave device, but the only example I found is for IAR EWAAVR 2.28a compiler: http://www.atmel.com/dyn/resources/prod_documents/doc2565.pdf http://www.atmel.com/dyn/resources/prod_documents/AVR311.zip Where can I find an example of twi slave for W
2005-01-20 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Paul Maddox" wrote: > Yeah, I do it all the time ... For beginners, maybe we should point out that during programming the programmer has to drive the LED currents, which it may not actually be designed to do. So, success may depend on which progr
2005-01-20 by Paul Maddox
James, > I'm just looking for the "net wisdom" as to whether this is an acceptable practice. Yeah, I do it all the time, looks kinda cool during programming too. One peice of advice, include a short delay after power up, but before you setup the IO pins. in CV-AVr I do something
2005-01-20 by Russell Shaw
E. Weddington wrote: > Russell Shaw wrote: > >> >> Adding new commands into gdb that you can use from the gdb shell and >> call up a help page isn't hard. I've added commands to set and >> show fuses and lock bits, and reset the device sanely. I'll add some >> others such as to u
2005-01-20 by James Washer
I'm a bit tight on pin count, and would like to use the 3 ISP pins (MISO/MOSI/SCL) for LEDs. My plan is to tie the LEDs high, and then through resistors down to these pins. I've "tested" this on an STK500 buy attaching the LED 10pin connector to the appropriate ports and have had
2005-01-19 by John Samperi
G'day all I have posted a newer version of the programmer firmware in the files area. V3.2 includes the 3 new devices supported by the new AVRprog V1.40. Also it is modified for the newer conditional assembler as it has both the Silicon chip's pinout and the standard pinout. Use
2005-01-19 by wbounce
Do you mean don't put a current limiting resistor between the switch and PORTD4? -----Original Message----- From: Paul Maddox [mailto:P.Maddox@signal.qinetiq.com] Sent: Tuesday, January 18, 2005 3:59 AM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Testing a switch on ATMe
2005-01-19 by wbounce
Sorry forgot to include compiler WIN AVR avr-gcc (GCC) 3.4.1 Thanks you hit the nail on the head. Changed it to if (PIND & (1
2005-01-19 by Russell Shaw
E. Weddington wrote: > Russell Shaw wrote: > >> E. Weddington wrote: >> >>> Russell Shaw wrote: >>> >>>> Hi, >>>> I've made avr-gdb control the atmel jtag ice directly. >>>> >>> Great! >>> >>> Is there any way that this might be added to the GDB project? >> >> yeah, after more te
2005-01-18 by Russell Shaw
Nils Kristian Strom wrote: > On Tue, 2005-01-18 at 20:13 +1100, Russell Shaw wrote: > >>Hi, >>I've made avr-gdb control the atmel jtag ice directly. > > Cool! > >>In getting the lock and fuse programming working correctly, >>somehow i erased the JTAG device ID and now it all read
2005-01-18 by Russell Shaw
E. Weddington wrote: > Russell Shaw wrote: > >> Hi, >> I've made avr-gdb control the atmel jtag ice directly. >> > Great! > > Is there any way that this might be added to the GDB project? yeah, after more testing. I can download files direct from gdb into the target board too. Yo
2005-01-18 by Richard Reeves
> - Would you use SPI or parallel bus to access the DAC chip? > - What DAC chip you guys recomend? Without thinking about it too much, I'd probably use the parallel DAC715 I've got lying around in a drawer at work somewhere :-) They're not cheap though (~30GBP). > - What is the d
2005-01-18 by Gus
Hello, For the analog and audio smarts out there I have some questions. I need to generate a good quality audio using AVR chips. The audio will be a 44.1Khz 16-bit WAV file. I can take care of loading/parsing data in RAM. Now, we need to convert the digital data to analog signal.
2005-01-18 by Russell Shaw
Russell Shaw wrote: > > Is there any way to write the ID back? Never mind. Need to get a stk500.
2005-01-18 by Russell Shaw
Hi, I've made avr-gdb control the atmel jtag ice directly. In getting the lock and fuse programming working correctly, somehow i erased the JTAG device ID and now it all reads as ff. I tried erasing the device, and setting the OCDEN and JTAGEN fuse bits, but no success. Avrstudio
2005-01-18 by Paul Maddox
> I have the following > > 5v ------ switch ------10K resistor --- ground > | > |-- 330 resistor -- PORTD4 > huh? Try this ;- 5v ------ switch --+---10K resistor --- ground | |--- PORTD4 This assumes the switch is the 'normally open' type. > printf("pinb %i ",PIND4); > if (PIND4)
2005-01-18 by Larry Barello
What is "PIND4"? You wouldn't happen to mean PIND.4 or (PIND & (1
2005-01-18 by wbounce
I have the following 5v ------ switch ------10K resistor --- ground | |-- 330 resistor -- PORTD4 This is supposed to be a switch with a pull down resistor. By default the pull up resistors should be on for a Atmega128 so I did the following DDRD &= 0xEF; // turn pin4 to input POR
2005-01-18 by Jim White
Thanks for all the good ideas on this. We are looking at the Maxim parts. Jim
2005-01-17 by alwelch93021
You can do it cheaply by using two of the non inverting hex buffers and pull up resistors. The sn74lvc1g07 is a single gate, runs on 3vdc and has open drain. depends on how many signals you have to translate. For something like SPI signals across the two nodes you could use the l
2005-01-17 by John Samperi
G'day Somebody has posted them on AVRfreaks/Studio4 forum. Basically there is the M64 and boot, M169 and boot, M8535 NO BOOT. I would paste them here but my new version of Eudora 6.2 crashes if I attempt to paste anything. Seems to be a bug as some people have reported the same p
2005-01-17 by Dennis Kazar
Got it. You have to take the original asm file and do a "create new" or some such process I stumbled into. For the first time I was actually glad to see assembly errors that were marked. I guess, like doing an uninstall of the old studio before you do the new install you have to
2005-01-17 by Svenn Dahlstrøm
I can recomend Imagecraft ICCAVR. Very good support, and V7.0 are about to bee released to day... http://www.imagecraft.com/software/index.html Svenn > > Hi to all. > I have such question: "Which compiler to use". > There are a lot of compilers IAR EWAVR, CodeVision, ICCAVR, Cros
2005-01-17 by Joe Tsang
Dear fellows, Atmel ARM-9 AT91RM9200 selling cheap ! The reasons I have those parts are as follows: 1. me = authorized seller of Atmel IC. 2. a guy promised to buy 500 pc Atmel AT91RM9200 from me. 3. but he broke his promise. So, now I have 500 pc AT91RM9200 on hand. 4. I can sel
2005-01-17 by Mike Murphree
On Jan 16, 2005, at 10:40 PM, DG (dee-gee) wrote: > > > I have similar design. I'm using SN74LVTH244 to interface Atmel 5V > part to 3.3V comm device. Another useful characteristic of these BiCMOS family parts is that they can be attached to a live bus while powered off without a
2005-01-17 by DG (dee-gee)
I have similar design. I'm using SN74LVTH244 to interface Atmel 5V part to 3.3V comm device. -- D.G. --- In AVR-Chat@yahoogroups.com, Jim White wrote: > We are working up a Mega128 based board that will have both 5V and > Jim
2005-01-17 by Russell Shaw
Jim White wrote: > We are working up a Mega128 based board that will have both 5V and 3V > parts. The 128 will run at 5V. Anyone have suggestions for converting the > 5V logic levels to/from the 128 to the 3V levels needed for some of the > other components. Space is at a premium
2005-01-17 by John Samperi
At 10:01 AM 17/01/2005, you wrote: >Ver.1 still gives me a syntax error, no indication of where it is and what >it is, not even the '
2005-01-16 by Ralph Hilton
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2005-01-16 by Dennis Kazar
Ver.1 still gives me a syntax error, no indication of where it is and what it is, not even the ' To: Sent: Sunday, January 16, 2005 4:29 PM Subject: Re: [AVR-Chat] AVRStudio Assembler > > At 05:05 AM 17/01/2005, you wrote: >>Am running v4.11 of studio and receiving assembler erro
2005-01-16 by Dennis Kazar
Perhaps I should clarify an earlier question. I am using ATmega168s and studio 4.11 just released. The assembler gives me one syntax error, ' Any suggestions? D