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1
Older Technology / An odd item for sure
« Last post by SeanB on June 30, 2022, 06:59:33 AM »
Decided to see what is inside this bit of arcane test equipment. Test gear, but while it is electronic, the use is definitely biological, and it has only one use.

Hennesey meat grader, what is used to set the quality of the meat you buy. Push the probe into the meat, and this machine does some arcane work with sensing in the probe, probably involving detecting fat content and water, then makes a decision as to what grade will be applied to the meat. Thus there is a need to attach a printer, probably a serial one via the power cord, and print out the grade, A, B, C and the class 1, 2, 3 of the meat, that is then used to run a coloured ink roller down the side in a line, to show, even after it has been sliced up into smaller parts, the grade of the original.

Has a case you can remove for cleaning, and then an inner housing on the electronics, with the 68705 CPU, with 16k of memory, and the external program EPROMs as well, plus the interface to the rest of the unit. Bottom board with the analogue stuff, and probably using some form of ADC to communicate with the CPU, and the isolated serial interface to the printer. 555 timer there as well, probably doing reset.

Definitely something is wrong, either there is another board hidden in the front, which does power conditioning, as 3A is a little high for power draw, though it does have sensing, so it knows when the probe is pushed into the device under test, and the speed of this, so it likely does evaluations on all aspects, rating according to depth as it goes in.

Power up and it does sort of work, but without the other half, which I do not have it remains a curiosity, made likely 1999 from the date codes, and never being repaired in this time, though there are a few minor revisions on the board, where there are extra components added probably due to earlier ones having common failures.
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New proof of concept ideas, projects, inventions / -
« Last post by Boymnmob on June 29, 2022, 04:07:22 PM »
Your display or theme is probably different from mine... on the white / light gray of mine the red shows up prettily but I have difficulty reading T PrimeŽs yellow posts. Alright, IŽll stick to black.

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Tutorials, lessons and courses / -
« Last post by Boymnmob on June 29, 2022, 03:16:18 PM »
I am having problems with posting this



How can I make the  bigger? Is their a latex command for that? Either that or can someone show me how to use it with displaystyle

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Older Technology / -
« Last post by Boymnmob on June 25, 2022, 03:48:11 PM »
I played champ 9394 english for 26 seasons on the Amiga and right at the end a message box came up with "congratulations" partially crashed out though, the game then crashed. Did the game on the Amiga have a maximum lifespan??
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Tutorials, lessons and courses / -
« Last post by Boymnmob on June 25, 2022, 01:33:59 PM »
I tried installing the four files in the elogind directory, which were "elogind", "libelogind0", "libelogind-compat", and "libpam-elogind", but it tells me that purging consolekit is still going to remove like 200 things.
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YouTube Video Episodes / 32 Bit Float Audio - Real World Advantage With Zoom F3
« Last post by SeanB on May 06, 2022, 05:00:32 AM »
32 Bit Float Audio - Real World Advantage With Zoom F3

https://www.youtube.com/watch?v=B2O5rvmghSA

In this video:
I demonstrate how 32 bit audio works and how it saved my bacon doing a binaural recording of the Bryson City Great Smoky Mountains Railroad train.
I show my workflow in Vegas Pro and Audacity.

Support me through Patreon or by using my Amazon Store:
Patreon: https://www.patreon.com/mjlorton
Amazon Store: http://astore.amazon.com/m0711-20

Referenced videos:

https://www.youtube.com/watch?v=yyJb1-wnBXM

https://www.youtube.com/watch?v=s4_9qDZFNaI

7
A Discussion and Demo of my HP 3410A Selective Microvoltmeter and measuring low level AC voltages.

https://www.youtube.com/watch?v=yY3Wp8yiqqc

In this video:
I chat about the purchase and damage / repair to an HP 3410A Selective Microvoltmeter. I discuss the challenges of measuring really low AC signals / voltages.
This is a prelude to a video about measuring the SNR (signal to noise ratio) of audio equipment. In that video I will demonstrate the capability of the following meters:
* Handheld multimeters
* The Rigol 3068 with a claimed noise floor of 5 uV.
* The HP 3458A
* The HP 3400A
* The B&K (Bruel & Kjaer) Type 2609
* The HP 3410A
* A "secret" German device from the 1980's that will measure down to around -130dBm / -144dBV / ~50-60 nano-volts.

Support me through Patreon or by using my Amazon Store:
Patreon: https://www.patreon.com/mjlorton
Amazon Store: http://astore.amazon.com/m0711-20
Or anything on Amazon

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8
YouTube Video Episodes / T4D #154 - Binaural Sound and How I Record It
« Last post by SeanB on February 24, 2022, 12:16:21 AM »
T4D #154 - Binaural Sound and How I Record It

https://www.youtube.com/watch?v=pY9iZo4aIi4

In this video:
* A look at how I make a binaural recording and why it is so immersive.
* A chat about ASMR and how "Audi", my binaural mannequin head could be a cheap option for making ASMR recordings.
* Some binaural recordings I made at the end of the video. 

Support me through Patreon or by using my Amazon Store:
Patreon: https://www.patreon.com/mjlorton
Amazon Store: http://astore.amazon.com/m0711-20

*** Programming Electronics Academy ***
Sign-Up below to join over 20,000 awesome people to learn from our Arduino Crash Course - it's 12 optimized video lessons to get you up and running quick with Arduino.

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Music clip from Youtube Music Library - Phase Three by Huma-Huma
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YouTube Video Episodes / T4D #153 - YouTuber Fatigue ..12 Years Later...and Updates...
« Last post by SeanB on January 11, 2022, 01:27:48 PM »
T4D #153 - YouTuber Fatigue ..12 Years Later...and Updates...

https://www.youtube.com/watch?v=8DgoMLwZc9A

In this video:
* An update on the Seplos batteries I installed and an issue with the BMS.
* I talk about my high accuracy clock project and how I plan in include my "Epoch Clock" code to improve time keeping.
* I go into the history of the HP-41C calculator that used the HP-82182A time module as a real time clock that made use of an "Epoch" to regulate time.

https://www.hpmuseum.org/hp41.htm
https://www.hpmuseum.net/pdf/KeyNotes_1982_Jan_Vol6No1_17pages_OCR.pdf
http://hp41.betapersei.com/files/User%27s%20Library%20Solutions/Time%20Module%20Solutions%20I.pdf
https://archived.hpcalc.org/greendyk/hp41c-time-module/57.html

* Redesigned Electrodacus SBMS40:
https://jag35.com/products/redesigned-electrodacus-sbms40

* A chat about my "YouTuber Fatigue"...
#ElectronicsCreators
------------------------------------------------------------------------------------------------------

Support me through Patreon or by using my Amazon Store:
Patreon: https://www.patreon.com/mjlorton
Amazon Store: http://astore.amazon.com/m0711-20
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YouTube Video Episodes / A Look Inside #17 - Rowe AMi WP-100 Storm CD Jukebox - Part 2
« Last post by SeanB on December 17, 2021, 01:12:29 PM »
A Look Inside #17 - Rowe AMi WP-100 Storm CD Jukebox - Part 2

https://www.youtube.com/watch?v=5TF0PBWs2Ec

In this video:
I take a look at the Rowe AMi WP-100 Storm CD Jukebox and go through some fault finding to resolve a keyboard issue.

AMI History:
https://www.jukeboxhistory.info/ami/history.html

Jukebox Service Manuals:
https://www.carlhaines.com/jukebox/manuals/


Support me through Patreon or by using my Amazon Store:
Patreon: https://www.patreon.com/mjlorton
Amazon Store: http://astore.amazon.com/m0711-20

*** Programming Electronics Academy ***
Sign-Up below to join over 20,000 awesome people to learn from our Arduino Crash Course - it's 12 optimized video lessons to get you up and running quick with Arduino.
https://www.programmingelectronics.com/mjlorton/?orid=12382
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