Discussion in "Project Help" started by    13kelly    Jul 22, 2008.
Tue Aug 05 2008, 07:20 am
#11


hi kelly,

i don't see anything ! have you uploaded the datasheet/image correctly





Arun
Tue Aug 05 2008, 08:10 pm
#12
here is the note validator details.
It was in doc format i converted it into pdf.

Tue Aug 05 2008, 09:12 pm
#13
thanks ajay,

now i can see it !

hey Kelly,

the validator can be easily interfaced to a micro as it supports several protocols,while going thru the manual, i bumped into this, look here :





yes, it supports parallel as well as serial Rs232 that makes our life easy, but you need to post the interface manual too.



Arun
Tue Aug 05 2008, 10:16 pm
#14
Arun,
Thank you for the help!
I am currently trying to put a design, (of sorts) together to get an idea of how to interface the validator to the 8051.
I hope to have a VERY rough draft later on today or earlier tomorrow and I would appreciate any criticism and help with my effort.

:-)

Ta again
Wed Aug 06 2008, 03:01 am
#15
Arun,
This is the first draft of the basic layout of what I think the project should start to look like.
Criticise, help, shred it, all help appreciated.





13



13



Wed Aug 06 2008, 07:40 am
#16

Hi Kelly,

thats a nice draft you have there, you are using a parallel interface but to make things simple you can use serial Rs232 protocol with 8051's UART that requires only 2 wires (Tx, Rx) between validator and the micro.

the user manual of the validator says that there is detailed description in Interface Description Manual of the validator. this manual will contain commands to which the validator responds in serial mode, so you need to get hold of this interface manual.



Arun
 13kelly like this.
Wed Aug 06 2008, 03:08 pm
#17
Arun,
Thanks, my baby did most of the drawing.
To make things a bit more difficult, the valiudator has been factory set to operate in parallel mode, so the RS 232 option is not a runner. Will try to get the Interface Description Manual asap.
Is the diagram any where near what I need to do to make the unit physically operate?

13
:-)

Ta
Fri Aug 08 2008, 05:25 pm
#18
Tried to log on yesterday, but there seemed to be a "bug" on the line, its good to see that you're up and running again.
I have an updated diagram that I wish to show and get some opinions.
Only three weeks to final date for project.
Will post diagram later.

13 :bye
Fri Aug 08 2008, 11:50 pm
#19
hi kelly,
another point in ur ckt diagram i feel worth modifying is that u r using a resistor divider to generate +5V for the uC which is not recommended. use a 7805 regulator instead as the +5V load is active load whose current consumption would be dynamic.
Sat Aug 09 2008, 01:35 am
#20
Have moved on from that, am now using LM7805 to get a clean 5V supply.
The only item that I am unsure of at the moment is the 8051 code that I will need to run the project.
If I forward you a Flow chart could you help with that?
I have devised a cct for the TX of a signal to turn on a remote strobe and horn but how and where to o/p a signal from the 8051 is what I would need from my peers. (The giants on whose shoulders I wish to stand on for a brief moment)

13 :-)

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