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2005-04-02 by rtstofer
I recently started building an autonomous biped robot with 9 servos, IR command control and probably some object sensors (TBD) The original had it easy, a PC controlled the bot with a wireless link. Instead I want to put all the behaviors in onboard code. Kind of like a minimalis
2005-04-02 by basicx_austin
--- In AVR-Chat@yahoogroups.com, "Alex Shepherd" wrote: > > I just completed building my own programmer based on the > > AVR910 app note > > (http://atmel.com/dyn/resources/prod_documents/DOC0943.PDF ) and the > > helpful notes and code I found on this website: > > http://www.ser
2005-04-01 by Ralph Hilton
On Fri, 01 Apr 2005 19:03:05 -0000 you wrote: >Has anyone used the AD7730NB, does it use the SPI interface?? > >Looking at connecting to a Mega128. > >A tip would be handy. That is one mean looking MF of a datasheet! My tip would be to wander over to www.linear.com Their chips se
2005-04-01 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > In the short term (this weekend) I need to stick with the 741 > which I have on hand but can someone recommend an inexpensive > "rail to rail" op-amp that would be better for my final > configuration which would eliminate
2005-04-01 by Leon Heller
----- Original Message ----- From: Laurens Gordyn To: AVR-Chat@yahoogroups.com Sent: Friday, April 01, 2005 8:03 PM Subject: [AVR-Chat] AD7730 Has anyone used the AD7730NB, does it use the SPI interface?? Looking at connecting to a Mega128. A tip would be handy. http://www.piclis
2005-04-01 by Laurens Gordyn
Has anyone used the AD7730NB, does it use the SPI interface?? Looking at connecting to a Mega128. A tip would be handy. Thanks in Laury
2005-04-01 by Mike Murphree
Dave VanHorn said: > > Digital is just a special case of analog anyway. If digital doesn't look like analog, you aren't looking at it fast enough... ;-) Mike
2005-04-01 by Dave VanHorn
> >You will not get flamed for electronics questions, as just about every >digital engineer knows, Analog is becoming a BIG part of our jobs as >clock speed increases. Digital is just a special case of analog anyway.
2005-04-01 by Chuck Hackett
> From: Kathy Quinlan > > .... > You will not get flamed for electronics questions, as just about every > digital engineer knows, Analog is becoming a BIG part of our jobs as > clock speed increases. I certainly didn't mean to imply that I would get flamed here. I was speaking ab
2005-04-01 by Mark Jordan
On 1 Apr 2005 at 12:14, Ralph Hilton wrote: > LM358 is rail-rail and very cheap. > LM6462 is a bit more expensive but very low power. Texas TLC2272 or TLC2274 are good options. -- Mark Jordan
2005-04-01 by Ralph Hilton
On Fri, 01 Apr 2005 15:54:04 +0800 you wrote: >> Still would like low cost recommendations for a single supply op-amp that can be >> used for inputs from .1 to .6 vdc. >> LM358 is rail-rail and very cheap. LM6462 is a bit more expensive but very low power. -- Ralph Hilton http://
2005-04-01 by Kathy Quinlan
Chuck Hackett wrote: >>From: Mark Jordan [mailto:mark@cpovo.net] >> >> Have you tried the AVR analog comparator? >> >> Mark Jordan > > > Good thought but I'm doing field testing of a signal conditioner to be attached > to an AVR in the future but for testing this weekend there is
2005-04-01 by Stefan Trethan
On Thu, 31 Mar 2005 14:59:10 -0600, Chuck Hackett wrote: > > BTW: Even though this will eventually feed an AVR is there another list > of > helpful, non-flaming folks that I should direct questions like this to? > I > realized that it's not directly AVR related. So far I just sub
2005-03-31 by alwelch93021
1. See figure 5, AN11 at www.linear.com for one way to generate negative bias. 2. Maxim semi offers switched cap bias supplies that even have low noise and adjustable regulation output... see this http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1205/ln/ Al Welch --- In AVR-Chat@yah
2005-03-31 by Robert Payne
Maybe have a look on the National site and use their "Webbench Design Tools" and see if that comes up with what you require ? They are usually good with samples as well http://www.national.com/appinfo/webench/scripts/my_webench.cgi Cheers Rob Payne > I'm using a 741 op-amp to con
2005-03-31 by Chuck Hackett
> From: Mark Jordan [mailto:mark@cpovo.net] > > Have you tried the AVR analog comparator? > > Mark Jordan Good thought but I'm doing field testing of a signal conditioner to be attached to an AVR in the future but for testing this weekend there is no AVR available. Also, there wi
2005-03-31 by Dave VanHorn
At 02:21 PM 3/31/2005, rajesh parwani wrote: >hi, >im using atmega 32, pls tell me what is the frequency at which it >would work if i dont change any fuse bits and just connect external >crystal of 8 mhz. It ships in the state where it's running on the 1 MHz oscillator.
2005-03-31 by Leon Heller
----- Original Message ----- From: rajesh parwani To: AVR-Chat@yahoogroups.com Sent: Thursday, March 31, 2005 8:21 PM Subject: [AVR-Chat] desperate help!!!!!! hi, im using atmega 32, pls tell me what is the frequency at which it would work if i dont change any fuse bits and just
2005-03-31 by Zack Widup
On Thu, 31 Mar 2005, rajesh parwani wrote: > im also in desperate need of a code with which i can interface > atmega32 with lcd hd447780 in 4 bit mode without monitoring busy flag The data sheet for the HD44780 seems to be hard to find these days. I have a copy of it on my websit
2005-03-31 by Grzegorz Bywalec
Hi! Try LM358 - it should work fine in this aplicattion (2opamp wersion of LM324). If you realy need negative supply you my use one uP pin to directly drive a cap in voltage converter. I use it to get negative contrast voltage for LCD displays. By changing duty cycle is posibble
2005-03-31 by rajesh parwani
hi, im using atmega 32, pls tell me what is the frequency at which it would work if i dont change any fuse bits and just connect external crystal of 8 mhz. im also in desperate need of a code with which i can interface atmega32 with lcd hd447780 in 4 bit mode without monitoring b
2005-03-31 by Stefan Trethan
Go for the LM324 (it has 4 opamps in a dil 14 and can go down to something like 200mV BELOW negative rail at the input ;-) ). There are also single and dual amp per package versions (see datasheet) but it is so cheap most people simply use the quad. You could make a negative volt
2005-03-31 by Bruce Parham
My Gawd, thought they all melted 20 years ago! Chuck Hackett wrote: > > I'm using a 741 op-amp to condition an input ...
2005-03-31 by Mark Jordan
Have you tried the AVR analog comparator? Mark Jordan On 31 Mar 2005 at 11:49, Chuck Hackett wrote: > > I'm using a 741 op-amp to condition an input signal. It's setup like a > threshold detector to detect a voltage level between .1 and .6 volts > (adjustable). It's my understand
2005-03-31 by Chuck Hackett
I'm using a 741 op-amp to condition an input signal. It's setup like a threshold detector to detect a voltage level between .1 and .6 volts (adjustable). It's my understanding (and experience) that the 741 can not operate that close to one of its rail voltages so I need to supply
2005-03-31 by n1ist
Last time I needed a negative bias supply for a single opamp, I just grabbed it from the max232 I was using for the serial port. If you have one of those in your circuit, it's a good source for +/-9V at limited current.
2005-03-31 by Kathy Quinlan
Dave VanHorn wrote: > At 06:39 PM 3/30/2005, Graham Davies wrote: > > > >>--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: >> >> >>>... if there's no operational >>>difference, why would the customer >>>differentiate? >> >>I'm kind of surprised to have got to this point in th
2005-03-31 by Brian Fairchild
I use Bascom for real, production quality, code without any problems. It's fast and the output is as good as I can write in assembler for general programming. If you really need to inspect its output you can generate an Atmel Studio compatible .OBJ file and load that into studio
2005-03-31 by Dave VanHorn
At 06:39 PM 3/30/2005, Graham Davies wrote: >--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > > > ... if there's no operational > > difference, why would the customer > > differentiate? > >I'm kind of surprised to have got to this point in the discussion. I >thought my poin
2005-03-30 by Mike Perks
Good points Alex. I'm new to programming AVRs. I don't claim to have invented anything new here but I thought other newbies might also find some value in my article. I initially started in microprocessors with BasicX (http://basicx.com/ ) which provides a simple entry point witho
2005-03-30 by Grzegorz Bywalec
Hi! In my opinion good solution is SI Prog. Schematic you can find on www.lancos.com/siprogsch.html. I use it for few years and allways with good results. It work fine with 5V supply. I newer tray to use it with lower voltage. Grzesiek Bywalec __________________________________ D
2005-03-30 by John Samperi
At 07:39 AM 31/03/2005, you wrote: >helpful notes and code I found on this website: >http://www.serasidis.gr/circuits/avr_isp/avr_isp.htm. > >Because of this topic is of resent interest in AVR-Chat, I have quickly >thrown together an article describing what I did. This is availab
2005-03-30 by Alex Shepherd
> I just completed building my own programmer based on the > AVR910 app note > (http://atmel.com/dyn/resources/prod_documents/DOC0943.PDF ) and the > helpful notes and code I found on this website: > http://www.serasidis.gr/circuits/avr_isp/avr_isp.htm. The problem with this AVR9
2005-03-30 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > ... if there's no operational > difference, why would the customer > differentiate? I'm kind of surprised to have got to this point in the discussion. I thought my point would have been taken and now I think I'm just going to
2005-03-30 by Mike Perks
Javier, I just completed building my own programmer based on the AVR910 app note (http://atmel.com/dyn/resources/prod_documents/DOC0943.PDF ) and the helpful notes and code I found on this website: http://www.serasidis.gr/circuits/avr_isp/avr_isp.htm. Because of this topic is of
2005-03-30 by Ben Zijlstra
Hello from Holland I would like to react on the Bascom-question. Give me any C program and I rewrite it in Bascom-AVR. Some routines even more tight then C. Have done so with a lot of programs for AVR's and Ethernetcontrollers, no problems yet. So, I agree with Joe Torelli, Basco
2005-03-30 by Max K.
Javier, Check throught the Atmel Application notes for the AVRs. There is a AppNote that gives schematics and source code. If you can't find it, let me know and I will find the exact AppNote. Best Regards, Max Koessick *************************************************************
2005-03-30 by Javier Fiasche
HI, does anyone know how to build a AVRISP or similar programmer?? I would like to use an Atmega8 (have plenty of this ;-) ) and would be needing schematics + firmware . If the circuit does not use mega8 i can mannage to redesign it, but still would be needing the C firmware to t
2005-03-30 by joseph torelli
I have used Bascom for a while now. It has worked well for me. There is a Bascom list on yahoogroups. Joe Torelli Mansfield, Texas >>>-----Original Message----- >>>From: Geo [mailto:buggies@blueyonder.co.uk] >>>Sent: Tuesday, March 29, 2005 10:05 AM >>>To: AVR-Chat@yahoogroups.co
2005-03-30 by Dave VanHorn
At 07:15 PM 3/29/2005, Graham Davies wrote: >--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > > > I haven't looked inside, but my > > entire use of the Olimex units > > so far has been at 3V. > >My Olimex JTAG ICE used an ATmega16, which is only specified down to >4.5 volts
2005-03-29 by David D. Rea
I have used Eagle for past projects, and had a very good experience. Most notable among them was (coincidentally enough) an AVR board for a class I took during my undergrad work. I sat down at 7PM and started designing the circuit. By 10PM, I was on to laying out the board. By 6A
2005-03-29 by Francisco Silva
I think this one is worth a look: Regards, -- Francisco On Wed, 30 Mar 2005 00:32:40 +0200, Andreas Stemmer wrote: > > Hi, > > a little OT question: what tools do the Linux users on this mailing list > use to design their electronic circuits? I primarily need something for > draw
2005-03-29 by Andreas Stemmer
Hi, a little OT question: what tools do the Linux users on this mailing list use to design their electronic circuits? I primarily need something for drawing schematics, but simulation facilities would be nice as well. I had a short look at Eagle and then found gEDA. Does anyone h
2005-03-29 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > I haven't looked inside, but my > entire use of the Olimex units > so far has been at 3V. My Olimex JTAG ICE used an ATmega16, which is only specified down to 4.5 volts. Now, in practice it is quite possible that an ATmega16
2005-03-29 by Russell Shaw
Zack Widup wrote: > > Hi Russell, > > Can you tell me more? > > Zack W9SZ > > On Wed, 30 Mar 2005, Russell Shaw wrote: > >>Multiple groups thin out the expertise. I could have told yas years ago >>about receiver design, dds spurs, and what to do with'em. The spurs are caused by c
2005-03-29 by Zack Widup
Hi Russell, Can you tell me more? Zack W9SZ On Wed, 30 Mar 2005, Russell Shaw wrote: > > Multiple groups thin out the expertise. I could have told yas years ago > about receiver design, dds spurs, and what to do with'em. >
2005-03-29 by Russell Shaw
Zack Widup wrote: > On Tue, 29 Mar 2005, Ralph Hilton wrote: > > >>On Mon, 28 Mar 2005 18:08:20 -0000 you wrote: >> >> >>>Hi, >>> There are groups for AVR and ATMega which I would like to share >>>with all. >>> >>>http://groups.yahoo.com/group/AVR_Microcontroller >>>http://groups
2005-03-29 by Geo
Hi, Is anyone aware of the current status of these two compilers? The Bascom mailing list search function at http://www.grote.net/bascom/index.html has never worked for me but this compiler seems to have been updated more recently (Dec 2004) than fastavr (21 Feb 2004). I have tri
2005-03-29 by Jim Wagner
Why, Why? With this list and AVRFreaks, thats plenty! Jim On Mon, 28 Mar 2005 18:08:20 -0000 "thefrustratedcodewarrior" > Hi, > There are groups for AVR and ATMega which I > would like to share > with all. > > http://groups.yahoo.com/group/AVR_Microcontroller > http:
2005-03-29 by Robert Adsett
At 09:03 PM 3/28/05 +0200, Philipp Adelt wrote: >Robert Adsett schrieb: > > It sounds more like an application for a FIFO or a dual port RAM. FIFO > > would be better for a buffer type scheme and dual-port for a mailbox type > > scheme. Both types would take care of most of your