Post by thread:[OnT] I have a project idea...

Hi Everyone, I think this is the first time I'm giving to the list instead of taking -- which I feel guilty about now and then <g>. I'm going to be doing a project with a PIC (16C84) and an ADC0831 (actually, TLC0831, but they're the same) for simple data acquisition. It will have an LCD screen for output and adjustable update intervals. It's not much, but it's something to learn about. Anyways, I'm wanting to know if anyone else is interested in this. If so, I'll make up a web page (with pictures, schematics, etc) to describe how to construct it. Anyone that's interested could drop me a line, or post it to the list -- althought, I'm sure Mark would rather you sent it to me directly =) Tim Hamel

Tim Hamel wrote: > > Hi Everyone, > > I think this is the first time I'm giving to the list instead of taking -- > which I feel guilty about now and then <g>. I'm going to be doing a project > with a PIC (16C84) and an ADC0831 (actually, TLC0831, but they're the same) > for simple data acquisition. It will have an LCD screen for output and > adjustable update intervals. It's not much, but it's something to learn > about. Anyways, I'm wanting to know if anyone else is interested in this. If > so, I'll make up a web page (with pictures, schematics, etc) to describe how > to construct it. Anyone that's interested could drop me a line, or post it to > the list -- althought, I'm sure Mark would rather you sent it to me directly > =) > > Tim Hamel =========================== Tim I would certainly be interested in this project. Let us know when it's ready to view. Harley L. Miller spam_OUThmillerTakeThisOuTsound.net

Hi, would not be easier to use a 16C7x - i.e. a PIC with built-in A/D? They works fine and they are cheaper on balance. Imre On Thu, 8 Jul 1999, Tim Hamel wrote: {Quote hidden}> Hi Everyone, > > I think this is the first time I'm giving to the list instead of taking -- > which I feel guilty about now and then <g>. I'm going to be doing a project > with a PIC (16C84) and an ADC0831 (actually, TLC0831, but they're the same) > for simple data acquisition. It will have an LCD screen for output and > adjustable update intervals. It's not much, but it's something to learn > about. Anyways, I'm wanting to know if anyone else is interested in this. If > so, I'll make up a web page (with pictures, schematics, etc) to describe how > to construct it. Anyone that's interested could drop me a line, or post it to > the list -- althought, I'm sure Mark would rather you sent it to me directly > =) > > Tim Hamel > >

I agree, I'm sure it would be easier. But using an external ADC exhibits the use of a 3-wire bus. It's mainly an example (in a way) for the newbies. Tim H. In a message dated 7/17/99 2:57:05 AM Pacific Daylight Time, .....rootKILLspam@spam@PROF.PMMF.HU writes: > Hi, > > would not be easier to use a 16C7x - i.e. a PIC with built-in A/D? They > works fine and they are cheaper on balance. > > Imre

Darn, I hate competition =) (kididing) I was using a MAX187 (12-bit, single-channel) before I switched over to ADC0831. Maybe we can swap ideas/tips. Only thing mine will lack is a serial interface...unless I tap into he route between the PIC and the ADC, hmm...<g> Tim Hamel In a message dated 7/23/99 10:18:45 AM Pacific Daylight Time, alemoraleKILLspamQSCONSUL.IT writes: > I'm planning to do something similar using > a MAX186 8ch 12bit serial ADC, a lcd display, a serial interface to PC and a > lm35 temp trasducer to employ as a serial aquisition module capable also to > display messages to the operator.

part 0 1093 bytes content-type:text/x-vcard; charset=us-ascii; name="vcard.vcf" (decoded 7bit) Pailoor Tim Hamel wrote: {Quote hidden}> Darn, I hate competition =) (kididing) I was using a MAX187 (12-bit, > single-channel) before I switched over to ADC0831. Maybe we can swap > ideas/tips. Only thing mine will lack is a serial interface...unless I tap > into he route between the PIC and the ADC, hmm...<g> > > Tim Hamel > > In a message dated 7/23/99 10:18:45 AM Pacific Daylight Time, > .....alemoraleKILLspam.....QSCONSUL.IT writes: > > > I'm planning to do something similar using > > a MAX186 8ch 12bit serial ADC, a lcd display, a serial interface to PC and > a > > lm35 temp trasducer to employ as a serial aquisition module capable also to > > display messages to the operator. -- Website : http://business.vsnl.com/chiptech Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Attachment converted: wonderland:vcard.vcf (TEXT/CSOm) (0000AA00)

In a message dated 7/26/99 1:38:09 AM Pacific Daylight Time, EraseMEchiptechspam_OUTTakeThisOuTVSNL.COM writes: > I use AD 7705 ( 16 bit, sigma-delta, 2 channel differential input ) with a > PIC to > communicate with a PC. It works great :-) Ahh...but mine is more meant for the field than near a PC. If I had chosen to a TLC0832 (from TI), then I coud have differential inputs and two channels also. But...I wanna keep things as simple as possible yet still be able to learn from it. Tim Hamel

part 0 1663 bytes content-type:text/x-vcard; charset=us-ascii; name="vcard.vcf" (decoded 7bit) I have 70 modules each having RS232 and RS485 drivers, 16C63, DAC 1220, AD7705 and 24LC08. The modules control the current fed to a electro plating rectifier i n 7 banks of 10 each. The settable current is from 1 Amp to 50 Amps. The non linearity of the rectifier responce is taken care by calibration and the values are stores in the SEEPROM. These 70 modules spread over 100 meters are connected to a master controller based on Z80 which in turn is connected to a PLC. The PLC sends group commands to the Z80 system and the Z80 in turn sends and receives data to and from the 70 modules. It is working well in the noisy field environment. Now this module has become a building block for various industrial applications. Pailoor Tim Hamel wrote: {Quote hidden}> In a message dated 7/26/99 1:38:09 AM Pacific Daylight Time, > chiptechspam_OUTVSNL.COM writes: > > > I use AD 7705 ( 16 bit, sigma-delta, 2 channel differential input ) with a > > PIC to > > communicate with a PC. It works great :-) > > Ahh...but mine is more meant for the field than near a PC. If I had chosen to > a TLC0832 (from TI), then I coud have differential inputs and two channels > also. But...I wanna keep things as simple as possible yet still be able to > learn from it. > > Tim Hamel Website : http://business.vsnl.com/chiptech Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Attachment converted: wonderland:vcard.vcf 1 (TEXT/CSOm) (0000AA11)

Oh no....that just sucked every ounce of will power to do this outta me <g> (kidding) Your app sounds VERY interesting. All I gotta do is improve the idea. Oh, one last thing, what I'm doing is for more of a hobby than a job. I still need to finish high school! Tim Hamel In a message dated 7/26/99 6:18:23 AM Pacific Daylight Time, @spam@chiptechKILLspamVSNL.COM writes: {Quote hidden}> My application is as follows. > > I have 70 modules each having RS232 and RS485 drivers, 16C63, DAC 1220, > AD7705 > and 24LC08. The modules control the current fed to a electro plating > rectifier in > 7 banks of 10 each. The settable current is from 1 Amp to 50 Amps. The non > linearity of the rectifier responce is taken care by calibration and the > values > are stores in the SEEPROM. > > These 70 modules spread over 100 meters are connected to a master controller > based on Z80 which in turn is connected to a PLC. > > The PLC sends group commands to the Z80 system and the Z80 in turn sends and > receives data to and from the 70 modules. > It is working well in the noisy field environment. > > Now this module has become a building block for various industrial > applications. > > Pailoor

Ravi, I was just researching RS485 chips. What chip do you recommend ? Eric On Monday, July 26, 1999 7:41 AM, Ravi Pailoor [SMTP:KILLspamchiptechKILLspamVSNL.COM] wrote: > My application is as follows. > > I have 70 modules each having RS232 and RS485 drivers, 16C63, DAC 1220, AD770 5 > and 24LC08. The modules control the current fed to a electro plating rectifier in {Quote hidden}> 7 banks of 10 each. The settable current is from 1 Amp to 50 Amps. The non > linearity of the rectifier responce is taken care by calibration and the value s > are stores in the SEEPROM. > > These 70 modules spread over 100 meters are connected to a master controller > based on Z80 which in turn is connected to a PLC. > > The PLC sends group commands to the Z80 system and the Z80 in turn sends and > receives data to and from the 70 modules. > It is working well in the noisy field environment. > > Now this module has become a building block for various industrial application s. >

part 0 1653 bytes content-type:text/x-vcard; charset=us-ascii; name="vcard.vcf" (decoded 7bit) I use 75176 ( national / texas ) and it works great. Maxim chips have better fea tures but availablity and costs are prohibitive in India. Pailoor Eric Oliver wrote: > Ravi, > > I was just researching RS485 chips. What chip do you recommend ? > > Eric > > On Monday, July 26, 1999 7:41 AM, Ravi Pailoor [SMTP:RemoveMEchiptechTakeThisOuTVSNL.COM] wrote: > > My application is as follows. > > > > I have 70 modules each having RS232 and RS485 drivers, 16C63, DAC 1220, AD7 705 > > and 24LC08. The modules control the current fed to a electro plating rectifi er in > > 7 banks of 10 each. The settable current is from 1 Amp to 50 Amps. The non > > linearity of the rectifier responce is taken care by calibration and the val ues > > are stores in the SEEPROM. > > > > These 70 modules spread over 100 meters are connected to a master controller > > based on Z80 which in turn is connected to a PLC. > > > > The PLC sends group commands to the Z80 system and the Z80 in turn sends and > > receives data to and from the 70 modules. > > It is working well in the noisy field environment. > > > > Now this module has become a building block for various industrial applicati ons. > > -- Website : http://business.vsnl.com/chiptech Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Attachment converted: wonderland:vcard.vcf 2 (TEXT/CSOm) (0000AD35)

Hi, I recommend SN75176. Cheap, simple to handle, etc. Imre On Tue, 27 Jul 1999, Eric Oliver wrote: > Ravi, > > I was just researching RS485 chips. What chip do you recommend ? > > Eric > > On Monday, July 26, 1999 7:41 AM, Ravi Pailoor [SMTP:spamBeGonechiptechspamBeGoneVSNL.COM] wrote: > > My application is as follows. > > > > I have 70 modules each having RS232 and RS485 drivers, 16C63, DAC 1220, AD7 705 > > and 24LC08. The modules control the current fed to a electro plating rectifi er in > > 7 banks of 10 each. The settable current is from 1 Amp to 50 Amps. The non > > linearity of the rectifier responce is taken care by calibration and the val ues > > are stores in the SEEPROM. > > > > These 70 modules spread over 100 meters are connected to a master controller > > based on Z80 which in turn is connected to a PLC. > > > > The PLC sends group commands to the Z80 system and the Z80 in turn sends and > > receives data to and from the 70 modules. > > It is working well in the noisy field environment. > > > > Now this module has become a building block for various industrial applicati ons. > > > >