Post by thread:To Few Port Pins ????

Hi There was some postings concerning the need for more port pins on, especially the 16C84. Ideas was given on "port expanders" eg. the 8 bit shift registers. However, there are still a bunch of chips that can be used : UCN5818AF 32-bit shift (15mA 60V) UCN5810AF 10-bit shift darlington UCN5832A 32-bit shift (150mA 40V) UCN5833A 32-bit shift (125mA 30V) 32 bit means that you can directly drive four 7 segment displays and lose 4 port pins. Somebody also makes a 36 bit shift which means you can also read a couple a switches. Microchip themselves makes a 32-bit shift designed for 4*LCD (cheap!!) The most ambitious if have seen was a EPROM socket coulpled to a UCN5382 and driven by a 16C84 that gets its data from a PC serial port. No read unfortunately. If software fails, turn to hardware: a 4060 12-bit ripple counter with a thermistor on its R/C side can supply a mean random number if you can give up a full port and a half !!!! The older hands can surely add to this list ??? Kind Regards Cassie

On Thu, 9 Oct 1997, : Cassie Carstens wrote: > Hi > There was some postings concerning the need for more port pins on, > especially the 16C84. Ideas was given on "port expanders" eg. the 8 > bit shift registers. However, there are still a bunch of chips that PTM: I'm myself making a prototype board with 16c84, 5 x 7-segm, 23 keys, 2 input lines, 8 output lines and one beeper. there will be PIC, HC137, HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. Using these input -lines as CE -lines we could connect 1 or 2 HC373 and add 16 in or out lines. Another line of tought made it possible to have 8 x 7segm + 32 keys and have port B free. We used here 4511, one transistor for inverter and 3:8 mux. (plus diodes and resistors) Using HC and 4000 -chips makes the project cheap. The only limit in the connections seems to be the limited program space, but then we can allways connect two or more PIC's in parallel (or series) -------------------------------------------------------------------------- PTM, spam_OUTpasi.mustalahtiTakeThisOuTutu.fi, .....ptmustaKILLspam@spam@utu.fi, http://www.utu.fi/~ptmusta Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk OH1HEK Lab.engineer (PC support) Computer Center OI7234 Mail: Turun Yliopisto / Fysla, Vesilinnantie 5, 20014 Pt 02-3336669, FAX 02-3335632 (Pk 02-2387010, NMT 049-555577) --------------------------------------------------------------------------

At 11:30 AM 10/9/97 GMT+2, you wrote: >UCN5818AF 32-bit shift (15mA 60V) >UCN5810AF 10-bit shift darlington >UCN5832A 32-bit shift (150mA 40V) >UCN5833A 32-bit shift (125mA 30V) snip who sells these chips in small (10-100) quantities? I think the manufacturer is Allegro but can't find a home page (yes i searched the web). here is a trick i used to get both inputs (key switches) and relays on the same chip ----+ Q1|---[relay]--->Vcc | | +--\/\/\-->Vcc Q2|----|)---| | +--------->Pic input port Q3|----|)---+ | | Q4|----|)---+ | | Q5|----|)---+ ----+ Push Button Switches By strobing Q2-Q5 low one at a time and checking the input port you can read the switches. note: this is not for high speed inputs and does take a fare amount of cpu time to read alot of switches, but when the cpu runs at 4MPS it's plenty fast enough. I have one project running with 12 relays and 20 inputs, all from a single driver chip. michael

Michael S. Hagberg wrote: > > At 11:30 AM 10/9/97 GMT+2, you wrote: > > >UCN5818AF 32-bit shift (15mA 60V) > >UCN5810AF 10-bit shift darlington > >UCN5832A 32-bit shift (150mA 40V) > >UCN5833A 32-bit shift (125mA 30V) > > snip > > who sells these chips in small (10-100) quantities? I think the > manufacturer is Allegro but can't find a home page (yes i searched the > web). here is a trick i used to get both inputs (key switches) and relays > on the same chip It is http://www.allegromicro.com/ -- Friendly Regards Tjaart van der Walt tjaartKILLspamwasp.co.za _____________________________________________________________ | WASP International http://www.wasp.co.za/~tjaart/index.html | | R&D Engineer : GSM peripheral services development | | Vehicle tracking | Telemetry systems | GSM data transfer | | Voice : +27-(0)11-622-8686 | Fax : +27-(0)11-622-8973 | | WGS-84 : 26010.52'S 28006.19'E | |_____________________________________________________________|

On Thu, 9 Oct 1997 11:03:48 -0500, you wrote: >At 11:30 AM 10/9/97 GMT+2, you wrote: > >>UCN5818AF 32-bit shift (15mA 60V) >>UCN5810AF 10-bit shift darlington >>UCN5832A 32-bit shift (150mA 40V) >>UCN5833A 32-bit shift (125mA 30V) > > snip > >who sells these chips in small (10-100) quantities? I think the >manufacturer is Allegro but can't find a home page (yes i searched the >web). <SNIP> Try http://www.allegromicro.com/ CIAO - Martin R. Green .....elimarKILLspam.....bigfoot.com

On Fri, 10 Oct 1997, TONY NIXON 54964 wrote: > <snip> > > HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. > > > In all my years in electronics I've never heard a cap called that.... > > It must be a new device to control dry joints. PTM: Sorry, English isn't my native language and sometimes you can see it :) -------------------------------------------------------------------------- PTM, EraseMEpasi.mustalahtispam_OUTTakeThisOuTutu.fi, ptmustaspam_OUTutu.fi, http://www.utu.fi/~ptmusta Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk OH1HEK Lab.engineer (PC support) Computer Center OI7234 Mail: Turun Yliopisto / Fysla, Vesilinnantie 5, 20014 Pt 02-3336669, FAX 02-3335632 (Pk 02-2387010, NMT 049-555577) --------------------------------------------------------------------------

I think he meant condensers, which the younger PICLIST members may not know is the archaic name for a capacitor. But maybe that's what they call them where he comes from. CIAO - Martin R. Green @spam@elimarKILLspambigfoot.com On Fri, 10 Oct 1997 08:40:55 +1000, TONY NIXON 54964 <KILLspamTony.nixonKILLspamENG.MONASH.EDU.AU> wrote: {Quote hidden}><snip> >> HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. > > >In all my years in electronics I've never heard a cap called that.... > >It must be a new device to control dry joints. > >Tony > > >Just when I thought I knew it all, >I learned that I didn't.

This problem with pins on an 84 gave me same trouble some time ago ! However the soulition followed. 1 x HC138 4 x HC244 4 x HC374 1 x LM016 30 outputs 30 inputs RS line and a beeper in a latch and two buttons. Started life as a box to test the integerty of multicore cables but now does lots more with the addition of relays ect. If anybody is instrested in my boring but useful hardware I will try and convert Orcad file to GIF or somthing and send it. Cheers Steve.....

Please send. Thanks Steve Smith wrote: {Quote hidden}> This problem with pins on an 84 gave me same trouble some time ago ! > > However the soulition followed. > 1 x HC138 > 4 x HC244 > 4 x HC374 > 1 x LM016 > > 30 outputs 30 inputs RS line and a beeper in a latch and two buttons. Started > life as a box to test the integerty of multicore cables but now does lots > more with the addition of relays ect. If anybody is instrested in my boring > but useful hardware I will try and convert Orcad file to GIF or somthing and > send it. > > Cheers Steve.....

Hi folks Andrew Russell Morris wrote: > > >> HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. > > > > > >In all my years in electronics I've never heard a cap called that.... > > > >It must be a new device to control dry joints. > > > >Tony > > I have. I lived in Holland for 3 years and learned the language. It happens with other languages also, in Portugal for instance we use the word "condensador" refering to such diferent devices as: Moisture (I'm not sure is the correct word but hope you undestand it) condenser on air-conditioning systems, steam machines, laundry dryers, and also 'Capacitors' in electronics. best regards Jorge F

Pasi, you probably speak better english than I and I was born here in Oregon, USA ;-) For the younger folks out there, "condenser" was another name for a capacitor. - Tom At 08:24 AM 10/10/97 +0300, you wrote: {Quote hidden}>On Fri, 10 Oct 1997, TONY NIXON 54964 wrote: > >> <snip> >> > HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. >> >> >> In all my years in electronics I've never heard a cap called that.... >> >> It must be a new device to control dry joints. >PTM: Sorry, English isn't my native language and sometimes you can see it >:) >-------------------------------------------------------------------------- >PTM, RemoveMEpasi.mustalahtiTakeThisOuTutu.fi, spamBeGoneptmustaspamBeGoneutu.fi, http://www.utu.fi/~ptmusta >Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk OH1HEK >Lab.engineer (PC support) Computer Center OI7234 >Mail: Turun Yliopisto / Fysla, Vesilinnantie 5, 20014 >Pt 02-3336669, FAX 02-3335632 (Pk 02-2387010, NMT 049-555577) >--------------------------------------------------------------------------

Hi TONY (TONY NIXON 54964), in <TakeThisOuT136D6D1163CEraseMEspam_OUTits-eng1.eng.monash.edu.au> on Oct 10 you wrote: > > HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. > > In all my years in electronics I've never heard a cap called that.... > > It must be a new device to control dry joints. The german word for capacitor is "Kondensator".

Marc 'Nepomuk' Heuler wrote: > > Hi TONY (TONY NIXON 54964), in <RemoveME136D6D1163CTakeThisOuTits-eng1.eng.monash.edu.au> on Oct > 10 you wrote: > > > > HC373, 4511, 5 transistors, 6 resistors, 5 diodes and some condensators. > > > > In all my years in electronics I've never heard a cap called that.... > > > > It must be a new device to control dry joints. > > The german word for capacitor is "Kondensator". in Dutch it is Condensator or Kondensator Luberth http://www.worldaccess.nl/~luberth

Tom Handley wrote: > Pasi, you probably speak better english than I and I was born here in > Oregon, USA ;-) > > For the younger folks out there, "condenser" was another name for a > capacitor. > > - Tom How young does one have to be not to know it? I'm 21 and I knew it! The youngest person I know of is the "stupid newbie" aka Jonathan at 16. Notice the way he's taken over the list? He must've drawn the most replies to ANY question I've ever seen! Cherio folks! -- Eric van Es | Cape Town, South Africa vanesEraseME.....ilink.nis.za | http://www.nis.za/~vanes LOOKING FOR TEMPORARY / HOLIDAY ACCOMODATION? http://www.nis.za/~vanes/accom.htm

>How young does one have to be not to know it? I'm 21 and I knew it! The youngest >person I know of is the "stupid newbie" aka Jonathan at 16. Oh, there was a 13-year old out there for a while. I wonder what's become of him... ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================

On Wed, 15 Oct 1997, Eric van Es wrote: > How young does one have to be not to know it? I'm 21 and I knew it! The youngest > person I know of is the "stupid newbie" aka Jonathan at 16. I've got you beat -- 20 and I knew what a condenser was. Must have been from that (short) phase where I had a thing for vacuum tube eqpt :). Pierce Nichols "I have a work order for the immediate demolition of your reality tunnel." -Bob, RAW Construction Corp. =========================================================================== Geek Code v2.1: d?H+sg+a-w++v+c++UHS+P+L+E+N+K!WM--!V-po+Y+t+5+j+R+G!tvb+++ D+B---e+u*hf+r+*n-y+

>> For the younger folks out there, "condenser" was another name for a >> capacitor. >> >> - Tom > >How young does one have to be not to know it? I'm 21 and I knew it! I've just been watching University Challenge on the BBC, between an Oxford college and the Open University (I study with the OU). Guess what one of the questions was for the Oxford team? "What's the original name for a capacitor?". Needless to say, they didn't know (despite my shouting it at the TV screen) - one of them suggested "a resistor"! Naturally, the OU won ... :-) Andy.

At 18:54 15/10/97 -0400, Andrew G Williams wrote: >I've just been watching University Challenge on the BBC, between an Oxford >college and the Open University (I study with the OU). Guess what one of the >questions was for the Oxford team? "What's the original name for a >capacitor?". Needless to say, they didn't know (despite my shouting it at the >TV screen) - one of them suggested "a resistor"! > >Naturally, the OU won ... :-) Naturally (check out my email address!) tony - From a cool, wet and very soggy Somerset, England. -- Mail - EraseMEajd3tutor.open.ac.uk | URL - http://cszx.open.ac.uk/~ajd3/ Tsar - "Winning isn't everything!" Kyzer - "Nah! - But it's the ONLY thing that matters mate!"