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## kenkeniff

564 posts

Ultimate Geek

Topic # 179337 4-Sep-2015 12:49

## raytaylor

3024 posts

Uber Geek

Trusted

Not sure but I do note there is 16 bits of information in that code.
So 2^16 = 65,536 possibilities

Are you trying to work out what J-021 is?

Do you know if the barcode represents J- also?
Or does it just represent 021 and the reader knows that the format is to have a J- in front?

What is the total range of the barcode? Letters, numbers, J-* or *-*** or something else?

Looks too difficult to me

edit: Okay so the top three marks are different and so I dont think that the barcode has the J- represented in it, unless there is some sort of decoding done at the end.

Ray Taylor
www.ruralkiwi.com

There is no place like localhost

## kenkeniff

564 posts

Ultimate Geek

raytaylor:

Are you trying to work out what J-021 is?

Yes I'm trying to work out how to generate J-nnn myself.

Do you know if the barcode represents J- also?
Or does it just represent 021 and the reader knows that the format is to have a J- in front?

The application that utilises the barcode on displays the number e.g. 9, 10, 11 etc so "J-" maybe irrelevant.

What is the total range of the barcode? Letters, numbers, J-* or *-*** or something else?

The have a range of barcodes up to 240 however would like to test if my application would recognise any barcodes generated up to 999.

## kenkeniff

564 posts

Ultimate Geek

This is the circuit used to read the barcode, hopefully someone can make use of it:

Markings are:
IS-T XM
ЯU (Recognized Component Mark)

IC:
VHC
165
C3 30

## LesF

125 posts

Master Geek

Did you get any further with this?  Its intriguing but I couldn't see a logical sequence.  Have you got any further background details on what the codes do or what they signify?  The chip appears to be a 8 bit shift register, but what does it feed the scanned values to?  Is there a processor with on-chip ROM code, or something running embedded software to process the barcode values?

## LesF

125 posts

Master Geek

It could possibly have these bit values, given a zero-based sequence, black=0 white=1

?? ?? ?? ?? ?? 02 04 08
16 ?? ?? ?? ?? ?? ?? ??

But the other bits are uncertain, it may not a numeric series.

## kenkeniff

564 posts

Ultimate Geek

LesF: Did you get any further with this?

Got a bit of progress on Stack Exchange however still a way to go: http://puzzling.stackexchange.com/questions/21962/what-comes-next-in-this-binary-sequence

## Aredwood

1563 posts

Uber Geek

Subscriber

One person supports this post

I'm starting to see a pattern. Yep I should be asleep instead of trying to figure out how the barcodes are generated. Will hopefully post back tomorrow.

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