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mmdgmljcr
Joined: 14 Oct 2007
Posts: 2
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 15 Oct 2007 14:36 100 points for good idea |
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you can use 89c2051(very simple /very low cost) to design it.
hardware:89c2051(11.0592M HZ)+max232
software :use vb com
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khepelesibilo
Joined: 23 Aug 2007
Posts: 5
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| 15 Oct 2007 21:18 Re: 100 points for good idea |
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use AVR
in BASCOM (basic compiler for AVR from www.mcselec.com it is free for up to 4Kbyte HEX which is enough for this projct):
$regfile = "m16def.dat" ' or any other AVR
$crystal = 4000000 ' for Example 4Mhz internal RC
$baud = 9600 ' use baud rate
Enable Interrupts
Config Date = Mdy , Separator = /
Config Clock = Soft 'this is how simple it is
Date$ = "10/15/07" 'set default DATE
Time$ = "12:00:00" 'set default TIME
'config your LCD pins if you want any LCD on your board
config pina.0 = input
Cls
Do
10:
if pina.0=0 then goto 10
20:
if pina.0=1 then goto 20
waitms 200
Home
Lcd Date$ ; " " ; Time$
print Date$ ; " " ; Time$
Loop
End
use internal RC @ 4MHz and a 32768Hz RTC crystal and your signal to porta.0 pin also MAX232 level convertor for RS232
open HYPERTERMINAL,open COMx,BAUD at 9600bit,DATA Bits 8,Parity none,Stop Bit 1,Flow Control none
you can see time and date in PC each time there is any signal from switch
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rachid77
Joined: 24 Jun 2006
Posts: 11
Helped: 2
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| 16 Oct 2007 16:48 Re: 100 points for good idea |
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| amiralib wrote: |
whit AVR or PIC or ...?
you need idea or you need all the circuit?!
you can use INT0 and Timer1 four counting and you can use Matlab to get report az text
AVR is good for you |
hello
yes AVR very good .
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pouchito
Joined: 29 May 2006
Posts: 162
Helped: 22
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| 17 Oct 2007 14:19 100 points for good idea |
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There are several projects (with software and hardware) on the net. You have to know how to search.
As all said you can do it with a microcontroller or just PC.
For PC Look controling home appliances from PC
Look for books containing projects
make a search and let me know if you need help.
You have to decide which way to go. I have experiance in both
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sn_burki
Joined: 18 Feb 2003
Posts: 152
Helped: 3
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| 17 Oct 2007 23:55 Re: 100 points for good idea |
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hi
its better if you use simply atmel 2051 with max. it is low cost and easy to build.
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CHELBBAY
Joined: 19 Oct 2007
Posts: 3
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| 19 Oct 2007 17:52 Re: 100 points for good idea |
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It is simple
if you are use the atmel at89c2051 chip
1'st read from senser by cpu port and then tx to PC by RS232 port.
the time count use by cpu interrupt.
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alih_ee
Joined: 20 Oct 2007
Posts: 4
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| 21 Oct 2007 13:15 100 points for good idea |
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| you can use plc software and write simple program.
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funnynypd
Joined: 09 May 2007
Posts: 641
Helped: 15
Location: USA
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| 24 Oct 2007 22:28 100 points for good idea |
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| 8051 and AVRs are not easy to get here in the USA, so PICs might be a good bet.
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blueroomelectronics
Joined: 17 Sep 2006
Posts: 1166
Helped: 58
Location: Toronto, Canada
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| 02 Nov 2007 18:47 Re: 100 points for good idea |
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| funnynypd wrote: |
| 8051 and AVRs are not easy to get here in the USA, so PICs might be a good bet. |
They're popular in India it seems.
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funnynypd
Joined: 09 May 2007
Posts: 641
Helped: 15
Location: USA
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| 02 Nov 2007 19:09 100 points for good idea |
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About 5 years ago, cyganal try to sell their high performance 8051 to us, very good design & performance. However their price is high comparing with PICs, samples are hard to get, and no +5V parts available for automotive market made us decide not using their staff.
Now they are sil-lab. Seems got better service than before. Still think it is a Very good platform.
Don't know much about AVR. Got the development tools, never get any sample.
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ehsanelahimirza
Joined: 24 Feb 2006
Posts: 433
Helped: 33
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| 05 Nov 2007 18:18 Re: 100 points for good idea |
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paralle port is the best option
hardware ==>one digital logical input for port.
and rest is programming in assembly or c++
1)port programming to read data
2)filing (making files) programming
filing will let u store tha data in .txt file along with the system time
u can program to monitot the port and when it gives signal, program will write a new line to predefined file adding time to it.
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e_eja
Joined: 15 Nov 2003
Posts: 150
Helped: 4
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| 14 Nov 2007 4:21 Re: 100 points for good idea |
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| use hall effect to detect current flowing throug rele, used RTC to maintine time and some micros
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hulahula
Joined: 15 Jul 2006
Posts: 33
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| 14 Nov 2007 5:35 Re: 100 points for good idea |
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| http://www.c51c51.com/
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heifu1747
Joined: 17 Apr 2007
Posts: 8
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| 19 Nov 2007 9:39 100 points for good idea |
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| en , i don't understand
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badboy2007
Joined: 05 Feb 2007
Posts: 185
Helped: 9
Location: http://cambo2engineer.8.forumer.com
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| 19 Nov 2007 11:22 Re: 100 points for good idea |
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hi
i think u should use the serial port to communicate from VB(visual basic) to PIC
i mean u can use VB read data from PIC ..... cos PIC have serial communication it ....
i hope u understand.....
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akljhN73
Joined: 16 Nov 2007
Posts: 3
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| 20 Nov 2007 11:01 Re: 100 points for good idea |
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i did a project like that in the last several months
51 MCU wih keilc IDE ,easy program
RTC DS1687-5, ALSO easy to use,only use the 51 MCU instruction
MOVX A,@DPTR to read the time and date you need,also can use
C language.
the enclosure i upload is the project chip code write by keil c.
u can use a serial port assistant on PC to debug it.
i have done it,can use
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khrboosh
Joined: 21 Nov 2007
Posts: 1
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| 21 Nov 2007 12:18 100 points for good idea |
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Yes, you can use COM port via serial port. Use VB to capture data, and thats it!
Thanks!
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blueroomelectronics
Joined: 17 Sep 2006
Posts: 1166
Helped: 58
Location: Toronto, Canada
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| 22 Nov 2007 17:06 100 points for good idea |
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| When's the cutoff date? When will the OP announce the winner I wonder?
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anilshrirao
Joined: 08 Sep 2007
Posts: 7
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| 22 Nov 2007 20:39 Re: 100 points for good idea |
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| what u want relay driver or entire interface
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chrismicro
Joined: 25 Jul 2006
Posts: 49
Helped: 3
Location: South Africa
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| 13 Dec 2007 12:38 Re: 100 points for good idea |
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Where is the parallel port on your PC? new PC's come without it! the easiest is to use a small PIC even a 10F to monitor the relay, when it's triggered it send a signal serial to a VB program running on a PC, the VB program take the system time and date and write a simple text log file to the HD, that's it
VB code snippet to write the file
| Code: |
Open FileName for append as #1
Print #1,Time, Date
close #1 |
PICBasic code to monitor the relay
| Code: |
Main:
IF GPIO.0 = 0 THEN GOTO Main 'monitor pin if it go high then send data
SEROUT GPIO.1,N2400,["Q", "Relay triggered"]
GOTO Main 'loop to label Main forever
END |
Added after 1 hours 17 minutes:
And here is the VB code I'm using on one of my projects to read the code of a Dallas iButton that is send by a PIC16F627
| Code: |
Private Sub MSComm1_OnComm()
Select Case MSComm1.CommEvent
' Handle each event or error by placing
' code below each case statement
' Errors
Case comEventBreak ' A Break was received.
Case comEventFrame ' Framing Error
Case comEventOverrun ' Data Lost.
Case comEventRxOver ' Receive buffer overflow.
Case comEventRxParity ' Parity Error.
Case comEventTxFull ' Transmit buffer full.
Case comEventDCB ' Unexpected error retrieving DCB]
' Events
Case comEvCD ' Change in the CD line.
Case comEvCTS ' Change in the CTS line.
Case comEvDSR ' Change in the DSR line.
Case comEvRing ' Change in the Ring Indicator.
Case comEvReceive ' Received RThreshold # of
' chars.
Dim Chain As String
Dim ChainASCII As String
Dim Character As String
Dim CodeCharacter As Integer
Dim Dummy As String
Dim Letter As String
Dim Counter As Integer
'Form1.MSComm1.Output = "SSA" 'stuur Acn
If (Form1.MSComm1.InBufferCount > 0) Then
Chain = Form1.MSComm1.Input ' +
Text1.Text = Chain
Text1.SelStart = Len(Chain)
ChainASCII = ""
For Counter = 1 To Len(Chain)
Character = Mid(Chain, Counter, 1)
CodeCharacter = Asc(Character)
Letter = Hex(CodeCharacter)
ChainASCII = ChainASCII + Letter
Next Counter
KeyCode = Right(ChainASCII, 11)
Gate = Left(ChainASCII, 1)
If Left(KeyCode, 1) > 0 Then KeyCode = 0 & Right(KeyCode, 10)
End If
Form1.MSComm1.Output = "SSA"
If (Form1.MSComm1.InBufferCount <> 8) Then
Form1.MSComm1.InputLen = 0
Dummy = Form1.MSComm1.Input
Form1.MSComm1.InputLen = 8
End If
Case comEvSend ' There are SThreshold number of
' characters in the transmit
' buffer.
Case comEvEOF ' An EOF charater was found in
' the input stream
End Select
End Sub |
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hpzjw
Joined: 08 Mar 2006
Posts: 4
Location: china
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| 05 Jan 2008 8:25 Re: 100 points for good idea |
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| pasicr wrote: |
Hi for all,
Anybody has idea for this,
one relay is activated with some signal for electronic door,
I need hardware + software for counting (in real time) any click on rele, with report like date and time of activation,
with possibility to connect on PC and get report in any format, txt, excel...
regards |
That is easy!avr is enough for you!
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sooramanil
Joined: 04 Jan 2008
Posts: 0
Location: Hyderabad, India
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| 07 Jan 2008 11:41 Re: 100 points for good idea |
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| i think RTC is better for calculating date and time, matlab is better for this
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dic_cosmin
Joined: 31 May 2006
Posts: 2
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| 06 Feb 2008 15:47 Re: 100 points for good idea |
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| Use a PIC microcontroller, make a clock software (time and date), and use external interrupt (INT pin ) for counting any click of relay. When a click of relay generate an interrupt you read the time and date and send to PC. You can increment a count register four counting the click of relay. Use serial port (rs232) and hyper terminal to connect with PC. In hyper terminal you can capture all data in *.txt format.
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armardu
Joined: 06 Oct 2007
Posts: 35
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| 27 Feb 2008 7:07 100 points for good idea |
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you can use RTC(real time clock) for date and time
but you can use matlab for controling all the events (recomended!)
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tcamargo
Joined: 18 Feb 2008
Posts: 4
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| 27 Feb 2008 23:29 100 points for good idea |
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| its a good ideia
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asokacolambage
Joined: 28 Feb 2008
Posts: 2
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| 12 Mar 2008 18:14 Re: 100 points for good idea |
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HI,
I am finding good electronic design idea for under graduate program. plese let me know suble idea for this
asoka
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muralicrl
Joined: 06 Feb 2008
Posts: 281
Helped: 30
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| 20 Mar 2008 11:54 Re: 100 points for good idea |
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Hi,
You can have a low end CPLD, Real Time Clock, Relay (5V preferrable), and additional small circuits. You can have a small piece of VHDL code for serial port, counting the clocks for relay ON and OFF. Serial port can be used to monitor and change the configuration of the CPLD settings.
I implemented this technique in one of our applications successfully.
If you need more details on this kindly contact me.
Regards,
N. Muralidhara
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Abdul Manan
Joined: 10 Nov 2007
Posts: 63
Helped: 6
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| 22 Mar 2008 19:36 100 points for good idea |
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choose pic 16f877
use all protocals available in it
in other words optimize the pic 16f877
semi semester project proposal
interface "tmp 124" temperature sensor using spi master protocol many other digital spi and i2c temperature sensors are easily available u can also request free sample from yi.com
then use pwm protocol and control the pwm of a fan based on temperature
design a techometric harware to calculate rpm of the fan or use a laptop or processor fan which has an inbuilt hardware of providing techometric signal
use counter module for rpm
now interface an alphanumeric lcd for displaying rpm pwm and temperature of the area using psp module of pic
u can also interface a humidity sensor using adc module
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makri
Joined: 01 Jan 2004
Posts: 113
Location: India, Kerala
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| 24 Mar 2008 18:14 Re: 100 points for good idea |
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hello
you told samples from yi.com it is not an electronics site
pl give correct address
makri
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Abdul Manan
Joined: 10 Nov 2007
Posts: 63
Helped: 6
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| 25 Mar 2008 5:54 100 points for good idea |
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| sorry its ti.com
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