Post by thread:[EE]:

Hi picers, looking for segmented calculator kind lcd (8 or more digit ), any body has a source? also, anyone had a problem using 5.579545MHz crystal (2x22pf)doing 8bit lcd? my 4mhz crystal is still on its way from jameco. Yansong -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Check Varitronix. They have a good selection of raw LCDs. Digi-Key handles some of their product line, but not all. Their web site has drawings and pinouts. As to the use of the 5.579545MHz crystal, you will most likely find that it will work OK. For production I would move up to a higher speed PIV, of course. Fr. Tom McGahee {Original Message removed}

I'm building a circuit that reads from the BCD input of a 7-segment decoder. I'm using LE as the trigger to the PIC16F84 to capture the BCD code. Problem is when I connect to the input of the BCD chip 4511 the 7-segment display flickers and displays wrong digits, I tried using a opto-isolator and an Op-amp 741( as Unity Gain Follower) but the display I'm reading from is still affected by branching the trigger to my circuit, circuit works OK on breadboard with clock for trigger. Anyone any ideas? -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Joe Denehan wrote: > > I'm building a circuit that reads from the BCD input of a 7-segment decoder. > I'm using LE as the trigger to the PIC16F84 to capture the BCD code. Problem > is when I connect to the input of the BCD chip 4511 the 7-segment display > flickers and displays wrong digits, I tried using a opto-isolator and an > Op-amp 741( as Unity Gain Follower) but the display I'm reading from is > still affected by branching the trigger to my circuit, circuit works OK on > breadboard with clock for trigger. Anyone any ideas? Yes, you are obviously loading the inputs to the 4511. Being cmos logic, whatever drives them should be ok to drive 10 or more cmos inputs. The only sensible guess would be that you have not configured the PIC inputs properly, and you are connecting PIC outputs to the 4511. Check your code that sets the tristate in/out settings for the PIC pins you are using, and especially check the bank switching for the PIC chip, on some chips the TRISB etc are on the same bank as the PORTB, other PIC chips you have to change banks to do the tristate. -Roman -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> > It matters because my driver is NOT o.c. Then the bus is not I2c. I suggest you re-read the specification, better still - this document is better as it includes how to use it instructions http://www-us.semiconductors.philips.com/acrobat/various/I2CBUS.pdf Chris Carr -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Chris (Carr): do you mean this: The I 2 C-bus and how to use it (including specifications) 1995 update ? Cos' if you do, this is the document I referred to in my original posting. I will be using Rs as in Fig.24 in said document but still I'd like to solve the mystery. In the end I'll have to tristate I think, or use two pins on the host for SDA and a NPN as OC driver, or even a shottky diode and a resistor in antiparallel. Oh well, I tried hard. thanks to all who answered, esp. Roman Black, Olin Lathorp and Chris Carr. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Engineers, New Exciting Embedded Opportunity!!!!!!!!!!!! I am currently conducting a search for a Bay Area based company that is looking for a Solutions Architect. Please let me know if you might know of anyone who would have an interest in hearing about the position listed below. Thanks for any assistance you may be able to provide. Solutions Architect. -This engineer will work closely with business development and sales personnel in a team to close license agreements. -The Solutions Architect will be the key technical point of contact for the customer/prospect. -Responsibilities include establishing close relationships with the customer's technical people (CTOs and VPs of Engineering to design engineers), working with engineering and marketing to develop technical expertise in products (CPU cores and Architecture), performing benchmarks for customers, and performing competitive analyses. -This engineer will also support customers in answering technical questions regarding implementing in an SOC (System on chip). -A key aspect of the job is the ability to work out with the customer a complete system solution including a CPU, hardware IP, middleware and operating system. Regards, Michael Mattson spam_OUTMikeM0069TakeThisOuTaol.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam@spam@mitvma.mit.edu with SET PICList DIGEST in the body

----- Original Message ----- From: Michael Mattson <MikeM0069KILLspamAOL.COM> > a Bay Area based company that is Hmm, which bay? It has been a while since I have taken geography but last I heard there are lots of them. Jeff -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam.....mitvma.mit.edu with SET PICList DIGEST in the body

> > a Bay Area based company that is > > Hmm, which bay? It has been a while since I have taken geography but last I > heard there are lots of them. Here in the US an unqualified "bay area" is usually understood to mean the San Francisco Bay area in California. This is even true where I am, 3000 miles accross the continent and much closer to the much larger Massachusetts Bay. (Although around here a comment might be added about those flaky Californians. How many Californians does it take to screw in a light bulb? About six, one to turn the bulb and five to share in the experience ;-) ). ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olinspam_OUTembedinc.com, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email @spam@listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

On Thu, 1 Nov 2001, Olin Lathrop wrote: How many Californians does it take to screw in a light bulb? > About six, one to turn the bulb and five to share in the experience ;-) ). > > he, he, he... And I believe you're an alien ! Vasile -- http://www.piclist.com hint: To leave the PICList KILLspampiclist-unsubscribe-requestKILLspammitvma.mit.edu

Hi all sorry for cross posting but this is a big screw up (it is on a pc so no wonder) I have a Tyan Trinity KT - A motherboard in my 18 year old sons PC, I tried to flash the bios, and the utility hung solid. I can still boot with a bios checksum error, but the flash upgrade, will not run as the chips header has been destroyed, so it thinks it is not an award bios chip. Any ideas ??? Or am I up for a new MB and needing to copy the flash chip in an external programmer ??? Regards, Kat (in desperation mode as 18 year old males get pissed off easily) ____________________________________________________________________________ /"\ ASCII Ribbon Campaign | K.A.Q. Electronics \ / - NO HTML/RTF in e-mail | Software and Electronic Engineering X - NO Word docs in e-mail | Perth Western Australia / \ | Ph +61 419 923 731 ____________________________________________________________________________ -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Kat, The default solution is to put the Bios chip into a programmer and burn the code to it like an old EPROM. I have had to do this before. Most of the time the flash code is still in a hex format. The last time I had to do this the Bios was still in a dip chip version. :-) Good luck Gordon Varney {Quote hidden}> Hi all sorry for cross posting but this is a big screw up (it is on a pc so > no wonder) > > I have a Tyan Trinity KT - A motherboard in my 18 year old sons PC, I tried > to flash the bios, and the utility hung solid. I can still boot with a bios > checksum error, but the flash upgrade, will not run as the chips header has > been destroyed, so it thinks it is not an award bios chip. Any ideas ??? > > Or am I up for a new MB and needing to copy the flash chip in an external > programmer ??? > > Regards, > > Kat (in desperation mode as 18 year old males get pissed off easily) > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

I am lucky it is a dip 2mbit chip :o) I have extracted the bin file (the original is a self extracting win zip) My hilo programmer does not do the flash chip (mutter mutter mumble mumble) <Jinx mode> I am cursed and life is against me ;o) </Jinx mode> Regards, Kat. ____________________________________________________________________________ /"\ ASCII Ribbon Campaign | K.A.Q. Electronics \ / - NO HTML/RTF in e-mail | Software and Electronic Engineering X - NO Word docs in e-mail | Perth Western Australia / \ | Ph +61 419 923 731 ____________________________________________________________________________ {Original Message removed}

Since the mobo can reprogram chips, I wonder how hard it would be to use one as a programmer? hehe _____________________________________________________________ Get your free email here at http://www.e-ha.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> <Jinx mode> > > I am cursed and life is against me ;o) > > </Jinx mode> > > Regards, > > Kat. <grouchy_old_git_who_still_looks_to_the_stars> Ya takes a lickin', ya keeps a-tickin' </grouchy_old_git_who_still_looks_to_the_stars> -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>I have a Tyan Trinity KT - A motherboard in my 18 year old sons PC, I tried >to flash the bios, and the utility hung solid. I can still boot with a bios >checksum error, but the flash upgrade, will not run as the chips header has >been destroyed, so it thinks it is not an award bios chip. Any ideas ??? >Or am I up for a new MB and needing to copy the flash chip in an external >programmer ??? You have 2 (maybe 3) ways of fixing it: 1 - Using an external programmer. Duh. 2 - Using an exact copy of the BIOS, inserted on the socket. After boot, CAREFULLY (blink attribute ON) take the memory off the socket, put your empty memory, flash the bios. It works! I did it in about a hundred motherboards before I got my "more or less universal" programmer 3 - Use an EPROM burn (burned?) with the original BIOS code. Same trick of swapping the chip Well, all three are feasible, tried and done. You are on your own ;o) ---8<---Corte aqui---8<---- Alexandre Souza RemoveMEtaitoTakeThisOuTterra.com.br http://planeta.terra.com.br/lazer/pinball/ ---8<---Corte aqui---8<---- -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>I have extracted the bin file (the original is a self extracting win zip) >My hilo programmer does not do the flash chip (mutter mutter mumble mumble) Kat (meow), which Hi-Lo program do you have? Do you know almost all Hi-Lo (dream of mine, hehehe) programmer has updates up to 27C080 and most flash/etc devices on their page? ><Jinx mode> >I am cursed and life is against me ;o) ></Jinx mode> ROTF! ;oD ---8<---Corte aqui---8<---- Alexandre Souza spamBeGonetaitospamBeGoneterra.com.br http://planeta.terra.com.br/lazer/pinball/ ---8<---Corte aqui---8<---- -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

i have a weather station that spits out rs232 hex data at five second intervals. if i leave the computer on 24/7 i can capture the data via the rs232 port not a problem. i would how ever like to be able to turn the pc off and have a logger or buffer store the data off line until i next turn my pc on (anywhere between a day, week or longer). i am not much of an eletronics person but i am sure some one would be able to design/build a unit that can do this. if any one is interested they can email me i and will send copies of the rs232 data strings and any other information i can. thanks again -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

toby wrote: > > i have a weather station that spits out rs232 hex data at five second > intervals. if i leave the computer on 24/7 i can capture the data via the > rs232 port not a problem. i would how ever like to be able to turn the pc > off and have a logger or buffer store the data off line until i next turn > my pc on (anywhere between a day, week or longer). > i am not much of an eletronics person but i am sure some one would be able > to design/build a unit that can do this. > if any one is interested they can email me i and will send copies of the > rs232 data strings and any other information i can. > > thanks again Hi Toby, I can probably knock up something simple for you. -- Best regards Tony mICros http://www.bubblesoftonline.com TakeThisOuTsalesEraseMEspam_OUTbubblesoftonline.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email RemoveMElistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

apology for those who received this earlier! Hi Picers, I recently made a pcb of 8x8 keypad of two "E"s facing eachother at the connecting point. Somehow, the port always gives errant value when it is supposed to be "0" since there is no input. Is this a capacitance or resistance problem? any help greatly appreciated. Yansong -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservEraseME.....mitvma.mit.edu with SET PICList DIGEST in the body

Do you have pull-down resistors in the reading part of the port to ensure the "0" reading? Francisco yansong gu wrote: {Quote hidden}>apology for those who received this earlier! > >Hi Picers, > >I recently made a pcb of 8x8 keypad of two "E"s facing eachother at the >connecting point. Somehow, the port always gives errant value when it is >supposed to be "0" since there is no input. Is this a capacitance or >resistance problem? any help greatly appreciated. > > >Yansong > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email EraseMElistservmitvma.mit.edu with SET PICList DIGEST in the body > > > > > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Some months ago I came across some references to a 'robot' constructed using Swatch watch motors as the motive force, and a PIC chip as the controller. As per usual, all such references ( URL's ) have disappeared from my PC. Can anyone point me to a web site with this type of device? harry... ********************************************************************** This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. ********************************************************************** ------------------------------------------------------------------------------------------------------------------------------- This communication contains information which is confidential and the copyright of the Australian Centre for the Moving Image. If you are not the intended recipient of this e-mail please notify the sender immediately and delete it from your system. Any views expressed in this message are those of the individual sender and may not be the views of the Australian Centre for the Moving Image, unless specifically stated. -------------------------------------------------------------------------------------------------------------------------------- -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestEraseMEEraseMEmitvma.mit.edu

At 11:41 AM 9/4/02 +1000, Harry Sokol wrote: >Some months ago I came across some references to a 'robot' constructed using >Swatch watch motors as the motive force, and a PIC chip as the controller. >As per usual, all such references ( URL's ) have disappeared from my PC. Can >anyone point me to a web site with this type of device? > >harry... I entered the following string into google: Swatch watch motor PIC and came up with http://www.eee.bham.ac.uk/woolleysi/swfyp97.htm dwayne -- Dwayne Reid <RemoveMEdwaynerspam_OUTKILLspamplanet.eon.net> Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 18 years of Engineering Innovation (1984 - 2002) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestTakeThisOuTspammitvma.mit.edu

Yup, been there.... The site I was looking for wasn't a University site, just 'someone's' stuff. Thanks anyway :} ( Think I might repost with something in the subject line ) harry... ********************************************************************** This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. ********************************************************************** ------------------------------------------------------------------------------------------------------------------------------- This communication contains information which is confidential and the copyright of the Australian Centre for the Moving Image. If you are not the intended recipient of this e-mail please notify the sender immediately and delete it from your system. Any views expressed in this message are those of the individual sender and may not be the views of the Australian Centre for the Moving Image, unless specifically stated. -------------------------------------------------------------------------------------------------------------------------------- -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

I recall a BEAM robotics site about using a ladies watch (could've been swatch, don't recall) for the motors. -Adam Harry Sokol wrote: {Quote hidden}>Some months ago I came across some references to a 'robot' constructed using >Swatch watch motors as the motive force, and a PIC chip as the controller. >As per usual, all such references ( URL's ) have disappeared from my PC. Can >anyone point me to a web site with this type of device? > >harry... > > >********************************************************************** >This footnote also confirms that this email message has been swept by >MIMEsweeper for the presence of computer viruses. > >********************************************************************** > > > >------------------------------------------------------------------------------------------------------------------------------- > >This communication contains information which is confidential and the copyright of the Australian Centre for the Moving Image. >If you are not the intended recipient of this e-mail please notify the sender immediately and delete it from your system. >Any views expressed in this message are those of the individual sender and may not be the views of the Australian Centre for the Moving Image, unless specifically stated. > >-------------------------------------------------------------------------------------------------------------------------------- > >-- >http://www.piclist.com hint: To leave the PICList >EraseMEpiclist-unsubscribe-requestspamspamBeGonemitvma.mit.edu > > > > > > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Atmel Introduces Industry's First 2.4-GHz DECT Non-Blind-Slot RF Transceiver IC for Voice and Data Applications New IC combines to form a complete 2.4GHz DECT System http://www.futurlec.com/News/Atmel/Phone.html -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

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Apologies if this message is of no concern to you I am currently re-writing an electronics design module to include the programming the PIC16F84 with the aid MPLab for DC and stepper motor and motion control applications. The students studying on this course are not Electronic Engineering students but design students with limited electronics background. Therefore the students need to gain a more practical knowledge and understanding of PIC programming so that they can embody the PIC programming in their main design projects. I am really trying to find out which would be the best approach for teaching & learning on programming the PIC16F84. For example, would it more useful if I make the course project based with different applications of PICs? To what extent would such students need to know about the architecture and associated theory of the PIC16F84 to support this? Although the students can read relevant books, data sheets and work through on-line tutorials, of which there are many, I'm really trying to strike a balance between effective practice based teaching and learning with PICs. I Again I apologise if this email is of no concern to you. Regards Tom -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email KILLspamlistservspamBeGonemitvma.mit.edu with SET PICList DIGEST in the body

> I am currently re-writing an electronics design module to include the > programming the PIC16F84 with the aid MPLab for DC and > stepper motor and motion control applications. Check http://www.voti.nl/cursus/e_index.html for my approach to learn 12-18 year old boys to use a 16f84. Read http://www.voti.nl/swp before doing anything with PICs. Forget the 16F84. Depending on your needs (A/D, number of pins, UART, speed, memory) there are lots of PICs to choose from. If a 16F84 was OK then a 16F630 will probably do an it is much cheaper (I assume your students fill fry some chips in the process). Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email EraseMElistservEraseMEmitvma.mit.edu with SET PICList DIGEST in the body