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Old August 6th 19, 06:57 PM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

On 2019/08/06 9:26 a.m., N_Cook wrote:
On 06/08/2019 16:18, wrote:
On Tuesday, 6 August 2019 13:36:38 UTC+1, * wrote:
Some of us have time on our hands.
Some of us have a perverse level of curiosity.
Which leads some of us to do strange things for no apparent reason.

Peter Wieck
Melrose Park, PA


There is always a reason. The OP has not stated his.


A side-scan tide gauge (Google for one of those)* Where no resident's
land is anywhere near the river water at low tide, just the top of the
tide. But 100m off land is about 98% of all the tide range , with large
collector lens (with bored=thru central hole for the outgoing laser )
works in lash-up so far. And unusually for tide gauges any wave action
increases the valid responses to the receiver at the required acute
angle. In line bright sunlight at 100m will probably be out though. Tide
height is then inversely proportional to the measured distance, as long
as the waves are not too high but that would just give a spread of
heights, averaging to about true presumably oe t least offsettable. A
"proper" geodometer with interface topc is far too expensive for this
sort of project.



That would have been useful in the OP. Makes the project much more
interesting!

You could make (then secure and float) an IR reflector, much like a
radar reflector, for calibration.

https://www.instructables.com/id/Lig...dar-Reflector/

John :-#)#

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Old August 7th 19, 08:24 AM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

On Tue, 6 Aug 2019 02:00:38 -0700 (PDT), Phil Allison
wrote:

amdx wrote:


Nutcase_Kook wrote:



( snip pile of Kook's incomprehensible gibberish )





What did he say?


I can't get mine into games mode either.




** ROTFLMAO !!



.... Phil

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Old August 24th 19, 05:18 PM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

On 06/08/2019 17:26, N_Cook wrote:
On 06/08/2019 16:18, wrote:
On Tuesday, 6 August 2019 13:36:38 UTC+1, wrote:
Some of us have time on our hands.
Some of us have a perverse level of curiosity.
Which leads some of us to do strange things for no apparent reason.

Peter Wieck
Melrose Park, PA


There is always a reason. The OP has not stated his.


A side-scan tide gauge (Google for one of those) Where no resident's
land is anywhere near the river water at low tide, just the top of the
tide. But 100m off land is about 98% of all the tide range , with large
collector lens (with bored=thru central hole for the outgoing laser )
works in lash-up so far. And unusually for tide gauges any wave action
increases the valid responses to the receiver at the required acute
angle. In line bright sunlight at 100m will probably be out though. Tide
height is then inversely proportional to the measured distance, as long
as the waves are not too high but that would just give a spread of
heights, averaging to about true presumably oe t least offsettable. A
"proper" geodometer with interface topc is far too expensive for this
sort of project.



Decoding so far, for anyone else doing similar (J makes an ideal search
engine term along with SZYCLCD.COM and ident YGFB178004-A1). 12MHz
sampling and 20 M samples per run on the analyser with d0 line for
trigger. SPI protocol with d3 as clock,d0 as MISO, d4 as MOSI, 4 bit
word length so superfluous analyser 8bit zeros removed in the following.
d1 and d2 only active during power-up page , not in measure mode.
For clarity and reduction, repeats in the coding via the following
look-up table.

J=
4,F,D,8,8,D,D,4,1,E,8,C,6,0,C,2,A,0,2,0,5,0,9,2,C, B,1,1,1,1,1,1,1,1,6,0,7,C,8,0,0,0,
K= 3,0,0,0,0,0,0,0,0,0,0,0,0,0,
L= 2,0,0,0,4,0,7,0,8,0,0,8,
N=2,0,A,0,0,8,4,0,8,0,0,4,
P=0,0,0,0,0,0,0,0,8,0,0,0,
Q=8,A,0,0,0,8,F,0,8,0,0,C,
R=0,0,4,0,5,0,8,0,0,8,
S=1,0,0,8,4,0,8,0,0,4,
T=1,0,0,8,F,0,8,0,0,C,
U=0,0,0,0,0,0,

Assuming J is invariant for this make and model in question, about 20
readings so far in the 1.000 to 2.000 display range ,it is invariant,
L to U would contain variation for units ,hundreds and thousands, DPs
and nulls and probably annunciators and other display rows data for the
other 3 lines in the display.

Single example of coding for the reading 1.264 in the bottom line for
the frames sent on pressing "measure" , running the analyser after
power-up each time and d0 line trigger occuring after pressing "measure"
, second frame is repeat of the first, powering down the measurer after
each reading.
1.264
J,K
L,K
N,K
Q,K
P,K
2,D,R,K
6,B,S,K
C,E,T,K
8,7,U,
J,K
2,D,R,K
6,B,S,K
C,E,T,K
8,7,U,

Preliminary decoding for readings in the range 1.0.. to 1.7..
for tenths in the rank P,K,*,x,R,K,*.y,S,K after the primary ident J,
where * is don't care/ignored and x,y is the coding
2 on the LCD codes to (x,y) D,B in the SPI
3 ~ D,7
5 ~ D,5
6 ~ D,D
7~ 9,7

for hundredths,
only *.*5* and *.*6* measures in the display so far
in the rank T,K,*,x,U
5 ~ SPI F
6 ~ 7
will probably require 1 or 2 other elements for the full set 0 to 9

for thousandths (for eventual use thousandths [mm] would be redundent)
R,K,x,*,S,K,y,*,T,K,z,*U
x, y, z SPI
1~ 6, 4, 0
2~ A, C, 4
3~ 6, C, 4
4~ 6, C, 8
6~ E, 8, C
7~ 6, 4, 4
8~ E, C, C


I might hookup an Arduino or a Pi , as in the intended usage , rather
than analyser ,for easier taking of pairs of readings/ LCD display
decoding look-up table determination , for the full set. There may be
transcription errors in the above of course.



--
Monthly public talks on science topics, Hampshire , England
http://diverse.4mg.com/scicaf.htm
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Old August 25th 19, 03:17 PM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

On 24/08/2019 16:18, N_Cook wrote:
Decoding so far, for anyone else doing similar (J makes an ideal search
engine term along with SZYCLCD.COM and ident YGFB178004-A1). 12MHz
sampling and 20 M samples per run on the analyser with d0 line for
trigger. SPI protocol with d3 as clock,d0 as MISO, d4 as MOSI, 4 bit
word length so superfluous analyser 8bit zeros removed in the following.
d1 and d2 only active during power-up page , not in measure mode.
For clarity and reduction, repeats in the coding via the following
look-up table.

J=
4,F,D,8,8,D,D,4,1,E,8,C,6,0,C,2,A,0,2,0,5,0,9,2,C, B,1,1,1,1,1,1,1,1,6,0,7,C,8,0,0,0,

K= 3,0,0,0,0,0,0,0,0,0,0,0,0,0,
L= 2,0,0,0,4,0,7,0,8,0,0,8,
N=2,0,A,0,0,8,4,0,8,0,0,4,
P=0,0,0,0,0,0,0,0,8,0,0,0,
Q=8,A,0,0,0,8,F,0,8,0,0,C,
R=0,0,4,0,5,0,8,0,0,8,
S=1,0,0,8,4,0,8,0,0,4,
T=1,0,0,8,F,0,8,0,0,C,
U=0,0,0,0,0,0,

Assuming J is invariant for this make and model in question, about 20
readings so far in the 1.000 to 2.000 display range ,it is invariant,
L to U would contain variation for units ,hundreds and thousands, DPs
and nulls and probably annunciators and other display rows data for the
other 3 lines in the display.

Single example of coding for the reading 1.264 in the bottom line for
the frames sent on pressing "measure" , running the analyser after
power-up each time and d0 line trigger occuring after pressing "measure"
, second frame is repeat of the first, powering down the measurer after
each reading.
1.264
J,K
L,K
N,K
Q,K
P,K
2,D,R,K
6,B,S,K
C,E,T,K
8,7,U,
J,K
2,D,R,K
6,B,S,K
C,E,T,K
8,7,U,

Preliminary decoding for readings in the range 1.0.. to 1.7..
for tenths in the rank P,K,*,x,R,K,*.y,S,K after the primary ident J,
where * is don't care/ignored and x,y is the coding
2 on the LCD codes to (x,y) D,B in the SPI
3 ~ D,7
5 ~ D,5
6 ~ D,D
7~ 9,7

for hundredths,
only *.*5* and *.*6* measures in the display so far
in the rank T,K,*,x,U
5 ~ SPI F
6 ~ 7
will probably require 1 or 2 other elements for the full set 0 to 9

for thousandths (for eventual use thousandths [mm] would be redundent)
R,K,x,*,S,K,y,*,T,K,z,*U
x, y, z SPI
1~ 6, 4, 0
2~ A, C, 4
3~ 6, C, 4
4~ 6, C, 8
6~ E, 8, C
7~ 6, 4, 4
8~ E, C, C


I might hookup an Arduino or a Pi , as in the intended usage , rather
than analyser ,for easier taking of pairs of readings/ LCD display
decoding look-up table determination , for the full set. There may be
transcription errors in the above of course.


For units decodng

From the previous, for unit=1 eg 1.264
R=0,0,4,0,5,0,8,0,0,8,
S=1,0,0,8,4,0,8,0,0,4,
T=1,0,0,8,F,0,8,0,0,C,

unit is more simply represented by the first term of each of R,S and T
string and so preliminary look-up table
unit ~ SPI R(1) , S (1) , T(1)
1~ 0,1,1
2~ 3,2,1
5~ 1,3,2
6~ 3,3,2
8~ 3,3,3
9~ 1,3,3
10~ 3,5,7 (or maybe 0) , (plus 3,4 and 7 also unknown so far)
and the remaining 9 terms of R,S and T are invariant for the readings
taken so far.

When the sun goes down a bit, I'll try some pairings in the range 10 to
50 metres, for 10s decoding

--
Monthly public talks on science topics, Hampshire , England
http://diverse.4mg.com/scicaf.htm


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Old August 26th 19, 11:47 AM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

Looks like tenths *.1** is 9,5 for the previous determinations.
Looks like processing for longer distances takes longer and timed-out
for 20M samples so will have to select more when I rerpeat.
Got display readings for 16.388, 26.766, 44.244 and 51.971m but full SPI
only for the shorter pair . I've had a display reading of 70m on this
when playing with the measurer on its own, so there is not an internal
timing/bounding limit to 50m. Resolution to 1mm in 70m but its absolute
accuracy , fixed positions and multiple readings, seems to be about
+/-1cm over 50m for outdoor nighttime atmosphere.
For the moment , as going above 10 involves coding changes in the Q and
T sections and only 2 valid SPI readings so far, staying with the units
decoding table of the previous and extending, maybe
unit/tens ~ SPI R(1) , S (1) , T(1)
1~ 0,1,1
2~ 3,2,1
5~ 1,3,2
6~ 3,3,2
8~ 3,3,3
9~ 1,3,3
10~ 3,5,7
16~ 3,7,6
26~ F,B,6

The tenths decoding of the 16... and 26.... agrees with the previous.
For eventual use, I'm only interested in the tens,units,tenths of metres
and then 100/110/120m for the 120m version.

--
Monthly public talks on science topics, Hampshire , England
http://diverse.4mg.com/scicaf.htm
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Old August 30th 19, 06:21 PM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

A collection of LCD display readings and their SPI codings with the
repeated sections removed, leaving just 4 "rows" of 3 hex characters
(intervening repeated strings removed for clarity, described earlier in
this thread, would come into play for hundreds /thousands/other rows in
the diplay perhaps).
The first rank all even(eg 2,6,C,8 in the 1.014m reading is the mm
(thousandths) ,0 to 9
The second rank (eg C,D,5,C in the 1.014) is the cm (combined tenths and
hundredths) , 00 to 99
The third rank (eg 0,1,1,0 in the 1.014 or 7,D,7,5 in the 30.190 ) is
the combined units and tens
so 0, 1,2,3 ... 99
going by the pairings of "19" in 30.190 and 2.197, both coded to 9,5,7,3
and "20" in 8.206 and 9.206 , both coded to D,B,D,7
Perhaps someone can see octal coding or something , to avoid determining
two sets of 100 pairings, but so far I've not managed to reduce the
required look-up conversions required.

1.014
2,C,0,
6,D,1,
C,5,1,
8,C,0,

1.036
6,D,0,
E,D,1,
8,7,1,
C,D,0,

2.197
2,9,3,
6,5,2,
4,7,1
4,3,1,


4.235
6,D,0
6,9,3,
8,F,3,
C,5,0

5.265
6,D,1,
6,B,3,
8,E,2,
C,7,1,

6.243
6,C,3,
6,9,3,
C,F,2,
4,6,1,

7.112
6,8,0
A,5,1
C,5,1
4,0,1,


8.206
6,D,3,
E,B,3,
8,D,3,
C,7,1,

9.206
6,D,1,
E,B,3,
8,D,3,
C,7,1


10.217
2,C,3,
6,9,5,
4,D,7,
4,4,1,

16.388
6,D,3,
E,7,7,
C,F,6,
C,7,1,

22.136
6,9,F,
E,5,A,
8,7,5,
C,1,5,

26.766
6,9,F,
E,7,B,
8,6,6,
C,7,5,


30.190
6,9,7,
E,5,D,
4,7,7,
C,3,5,

30.191
2,9,7,
6,5,D,
4,7,7,
0,3,5,

30.192
6,9,7,
A,5,D,
C,7,7,
4,3,5,

30.195
6,9,7,
6,5,D,
8,7,7,
C,3,5,

30.196
6,9,7,
E,5,D,
8,7,7,
C,3,5,

The 30.19 set was setting up on a tripod and repeated grabbing codings
until I got a repeat reading. This was at dusk, after a sunny day, but
even so over 30m , for 6 readings involving switching off and on again ,
just a spread of 6mm and no guarantee my touching the buttons did not
upset the tripod a bit.

--
Monthly public talks on science topics, Hampshire , England
http://diverse.4mg.com/scicaf.htm
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Old February 4th 21, 02:37 PM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

On Friday, August 30, 2019 at 6:21:26 PM UTC+2, N_Cook wrote:
A collection of LCD display readings and their SPI codings with the
repeated sections removed, leaving just 4 "rows" of 3 hex characters
(intervening repeated strings removed for clarity, described earlier in
this thread, would come into play for hundreds /thousands/other rows in
the diplay perhaps).
The first rank all even(eg 2,6,C,8 in the 1.014m reading is the mm
(thousandths) ,0 to 9
The second rank (eg C,D,5,C in the 1.014) is the cm (combined tenths and
hundredths) , 00 to 99
The third rank (eg 0,1,1,0 in the 1.014 or 7,D,7,5 in the 30.190 ) is
the combined units and tens
so 0, 1,2,3 ... 99
going by the pairings of "19" in 30.190 and 2.197, both coded to 9,5,7,3
and "20" in 8.206 and 9.206 , both coded to D,B,D,7
Perhaps someone can see octal coding or something , to avoid determining
two sets of 100 pairings, but so far I've not managed to reduce the
required look-up conversions required.

1.014
2,C,0,
6,D,1,
C,5,1,
8,C,0,

1.036
6,D,0,
E,D,1,
8,7,1,
C,D,0,

2.197
2,9,3,
6,5,2,
4,7,1
4,3,1,


4.235
6,D,0
6,9,3,
8,F,3,
C,5,0

5.265
6,D,1,
6,B,3,
8,E,2,
C,7,1,

6.243
6,C,3,
6,9,3,
C,F,2,
4,6,1,

7.112
6,8,0
A,5,1
C,5,1
4,0,1,


8.206
6,D,3,
E,B,3,
8,D,3,
C,7,1,

9.206
6,D,1,
E,B,3,
8,D,3,
C,7,1


10.217
2,C,3,
6,9,5,
4,D,7,
4,4,1,

16.388
6,D,3,
E,7,7,
C,F,6,
C,7,1,

22.136
6,9,F,
E,5,A,
8,7,5,
C,1,5,

26.766
6,9,F,
E,7,B,
8,6,6,
C,7,5,


30.190
6,9,7,
E,5,D,
4,7,7,
C,3,5,

30.191
2,9,7,
6,5,D,
4,7,7,
0,3,5,

30.192
6,9,7,
A,5,D,
C,7,7,
4,3,5,

30.195
6,9,7,
6,5,D,
8,7,7,
C,3,5,

30.196
6,9,7,
E,5,D,
8,7,7,
C,3,5,

The 30.19 set was setting up on a tripod and repeated grabbing codings
until I got a repeat reading. This was at dusk, after a sunny day, but
even so over 30m , for 6 readings involving switching off and on again ,
just a spread of 6mm and no guarantee my touching the buttons did not
upset the tripod a bit.
--
Monthly public talks on science topics, Hampshire , England
http://diverse.4mg.com/scicaf.htm

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Old February 4th 21, 02:42 PM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

Display datasheet is available www.amega.sk/brano/Displej.pdf
driver ST7567A

code (STM32 spi client ) is www.amega.sk/brano/main.c
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Old February 5th 21, 11:14 AM posted to sci.electronics.repair
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Default Help hacking a laser tape measure?

Do you have code for arduino? Thanks


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