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Topics - Mads Barnkob

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1
This is a Aethra Colour CCD Webcam that was part of a system made for remote medical diagnose / consultation for patients in remote locations.

The system was mounted in a car to be mobile, so a driver could visit patients and make a call to the doctor do complete the consultation within the patients home. The system was driven by a embedded PC with a complete circuit for the interface, audio/video and running all peripherals on a RS232 daisy chain. The whole setup used some kind of GSM link to transfer the video and audio signal, seemed to be a very expensive and complex setup.

Mainboard computer thread: https://highvoltageforum.net/index.php?topic=647.0


3
I received this on the Tesla Coil Mailing List ( https://www.pupman.com/mailman/listinfo/tesla ) today:

Full topic: "4. Bill Wysock's scrapbook, Frederick Finch Strong's scrapbook, T. B . Kinraide Archive, H. G. Fischer Blueprints, Electrotherapy Museum Archive, Unpublished Letters/Lectures of Tesla Family (Jeff Behary)"

Message:
Tesla group:

Some recently published photos, scrapbooks, and archives.
Not an easy thing to do...but I figured having the information out there is better than it dying with me or friends, or getting scrapped (like the Tesla family archives).
If these things were found 100 years from now they'd be considered national treasures and no one would think twice to publish them.
It's harder when it's friends.  Most of this stuff was never meant to be published... but are too priceless to be lost.  Right or wrong, I'm sorry either way.
My goal is to upload 50,000 pages by the end of the year.  The last few years have been too much.

Bill Wysock's Scrapbook and Photos
621 pages:
https://archive.org/details/billwysockscrapbooks

Tesla Technology Research
160 pages
https://archive.org/stream/billwysockscrapbooks/Bill_Wysock_TTR#mode/2up

Unpublished Letters
691 pages:
https://archive.org/details/electrotherapymuseumletters

Dr. Frederick Finch Strong's Scrapbook and Archive
Part 1:  429 Pages:
https://archive.org/details/ffs1scrapbook
Part 2:  337 Pages:
https://archive.org/stream/ffs1scrapbook/FFS_2_High_Freq_Currents#mode/2up
Part 3:  104 Pages:
https://archive.org/stream/ffs1scrapbook/FFS_3_Ajax_Replicas#mode/2up

Electrical Discharges in a Vacuum
92 Pages:
https://archive.org/details/VacuumDischargeTubesLowResolution

A selection of 11x17 blueprints from H. G. Fischer Corp
1427 Pages:
https://archive.org/details/HGFischer11x17Blueprints

T. Burton Kinraide Archive
5020 Pages
https://archive.org/details/QuestForKinraide5026pgs

Electrotherapy Museum Booklets:  1996-2003
4390 Pages
https://archive.org/details/electrotherapymuseum19962003

Jeff Behary,
or what remains of him.

4
The HP T-620 Thin Client is a powerful little machine, that with ease can be hacked into using a random 19VDC PSU and run Windows as any normal PC, easy and cheap PC!

This thin client was thrown out, without anything else than the box itself, no power supplies, no nothing.

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The port and connector layout from the manual shows that the HP T-620 models needs a 19VDC power supply. A little searching showed that it was not as simple as just supplying it with 19VDC. HP has put in a few tricks to make a "smart laptop charger" so that you can only use their chargers.



The "smart laptop charger" restriction can be bypassed with a simple current limiting hack as per this little schematics.



All credits for this hack goes to:  http://nerdipedia.com/wiki/tiki-index.php?page=Smart+laptop+charger

The machine itself is powerful enough to put a little work into modding it into a PC, running Linux or Windows off a USB disk or for some models, you can even find a spare SSD slot on the motherboard, unlucky for me, this model does not have that option.


5
Hobby sites / Tesla Coil Image Albums Worth Sharing
« on: November 01, 2019, 10:04:32 PM »
There is a lot of coilers that never got around to document their projects, but still took a lot of pictures. Here is a list of my favorites, please reply with more if you have!


Eric Goodchild: https://www.flickr.com/photos/40804581@N04/
Gao Guangyan / Loneoceans: https://www.flickr.com/photos/loneoceans/
Hvman: https://www.flickr.com/photos/hvman/
Megavoltmeister: https://www.flickr.com/people/38438611@N02/
Phillip Slawinski: https://www.flickr.com/photos/pslawinski/with/4308016178/
Roy Piepers: https://www.flickr.com/photos/roypiepers/albums
Steve Ward / Kickermagnet: https://www.flickr.com/photos/kickermagnet/
Steven Canton: https://www.flickr.com/photos/stevencaton/albums
Weston Braun: https://www.flickr.com/photos/63341195@N08/albums/72157678478822788

6
/>
Three-phase string inverter, 20000Wac, 2 MPPT, 4 DC inputs for each MPPT, RS485 communication interface, IP65 (NEMA4x) environmental protection degree, integrated DC and AC disconnect switch, DC and AC surge arrester (type 2), string fuses (4+4 on each MPPT) and single string current monitoring

Full details: https://new.abb.com/products/6AGC002904/trio-20-0-tl-outd-s2x-400-inverter

7
Beginners / Analog Panel Meter Shunt Calculation and Custom Scale Design
« on: October 16, 2019, 07:56:20 AM »
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I needed a 50A current meter for the 1800W induction heater ( https://highvoltageforum.net/index.php?topic=530.0 ), but had none with the proper scaling. I do however have a large box of 1mA blank scale meters, so I decided to do a video on the following topics:

- Learn how to calculate the shunt resistor for your analog panel meter
- Guesstimate the internal resistance of a unknown meter
- Design custom scales if you have a blank meter or want to use a meter for another purpose than its original.

Link to scale-o-matic: http://stiftsbogtrykkeriet.dk/~mcs/Scale.html
Link to Meter from Tonne software: http://www.tonnesoftware.com/meter.html

8
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I visited HI Tech & Industry Scandinavia 2019 in Herning, Denmark and while doing so I recorded clips of the most interesting robots, robotics, machines, vision, PLC and machine technology.

You can find booth exhibitions from Schneider Electric, Beckhoff, Flir, MakerBot, Wago, Rhode&Schwartz, Coherent and so on.

9
Electronic circuits / 50KVA generator on a 4 cylinder Dorman diesel engine
« on: September 26, 2019, 09:44:26 AM »
I came by a small emergency generator that has been in service and still is, for a atleast 50-60 years.

The generator itself is a Titan København 50 KVA 3 phase 380 VAC, 76 Ampere and the diesel engine is a British Dorman 4LBIII 4 cylinder engine, which was also used in large excavators at the time.

The control panel was upgraded once, from a purely mechanical control, to a phase lock controller, which is still pretty old by todays standards.


10
Teardown of a Nokia Siemens Networks Flexi Multiradio base station. This have been in service as a 3 antenna system for mobile telecommunications.

GSM/EDGE, WCDMA/HSPA and LTE capable. 3x90 Watt output power.

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Flexi RF Module Triple (FXxx)

The Flexi Multiradio Radio Frequency Module (FXxx) or RF Module, is a 3-branch multicarrier,multi-standard radio transceiver module. The module consists of three independent branches, capable of transmitting and receiving signals of multiple radio technologies concurrently:

    Up to 6 GSM carriers with 400 KHz minimum carrier separation
    Up to 4 WCDMA carriers with 4.6 MHz minimum carrier separation
    Multi-carrier LTE signal with 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, and 35 MHz carrier bandwidth
    Multi RAT operation with combination of GSM, WCDMA, and LTE

The RF Modules FXDA, FXDJ, FXEA, FXCA, and FXFA/ FXFB are referred to as 70W RF Module variants. RF Modules FXEB and FXDB are referred to as 90 W RF Module variants. Each branch consists of a transmitter and two receiver chains. FXxA and FXFB (70W) variants have front end software tunable filters (STuF). 90 W RF Module variants have fixed full band filters. FXxx is a 3U high module with an integrated, replaceable 3-fan assembly for module cooling. The supported functions are:

    Chaining up to three RF Modules with OBSAI RP3_01
    2-way receive diversity in the receiver chains
    Integrated antenna line supervision
    MHA, Antenna Hopping, EGPRS2, and VAMOS support
    Digital and control circuitry, optical interface, DC/DC power conversion, and other necessary functionalities
    Integrated DC line OVP, Class II rated to 5kA pulse (FXFB, FXDB/FXEB)
    Remote Electrical Tilt (RET) support (FXFB, FXDB/FXEB)

Flexi Multiradio BTS GSM/EDGE modules are equipped with an integrated air guide plate providing full thermal compliance without casings. This allows installation of the modules without casings in Flexi cabinets and enclosed 19″ racks. Casings and covers are recommended in standalone 19″ racks (no cabinet) for safety reasons. Casings are not part of the FXxx delivery package. If the configuration requires casings, Flexi BTS Module Casing (EMHA) kits must be ordered.

The Flexi Multiradio RF Module variants are:
Version    Description
FXDA     GSM 900 (E-GSM) 70W
FXDJ     GSM 900 J-Band (P-GSM for CDMA co-siting) 70W
FXEA     GSM 1800 70W
FXCA     GSM 850 70W
FXFA/FXFB GSM 1900 70W
FXDB     GSM 900 (E-GSM) 90W
FXEB     GSM 1800 90W

11
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How to make a stencil template out of metal sheet, reusable and very sturdy. Can be used for spray or brushed on paint. No power tools, only cheap hand tools, a laser printer and clothes iron.

I highly recommend using a stencil font with sharp edges, as it makes it much easier to cut. You can find a wide variety of fonts for free: https://www.google.com/search?q=stencil+font&newwindow=1&source=lnms&tbm=isch&sa=X

12
Electronic circuits / ESAB Power TIG 200 Welder Teardown
« on: August 16, 2019, 08:03:18 PM »
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A teardown of a ESAB Power TIG LTR200 welder, a run down of the current paths in the system and I show which parts I kept.

13
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Standard Features:
Intel Mobile Pentium III 700 or 750 MHz CPU
ATI Rage Mobility 128 with 16MB
15.0" TFT display with 1400x1050 resolution
128MB PC-100 memory standard (512MB max)
18 or 20GB HDD

14
Beginners / MOVED: First coil
« on: July 30, 2019, 07:31:16 PM »

15
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A teardown of a Danfoss VLT6000 4kW VFD, a run down of the current paths in the system and I show which parts I find to have a value.

Datasheet on the unit: https://www.danfoss.com/en/products/ac-drives/dds/vlt-and-vacon-legacy-drives/vlt-6000/#tab-overview

16
I found a old 3.5" floppy drive cleaning kit and tried it out on a defective computer/floppy drive/floppy that I had. It would constantly ruin "new" disks and leave them with few kb of useful space.


17
YouTubes change from subscription to notification bell has had a huge impact on all channels, as they only themself estimate a average of maximum 30% of subscribers will actually get a notification due to people not updating their notification settings for all previously subscribed channels.

I myself have run through my entire subscription list and turned on notifications for all channels, as that was the reason I subscribed to them in the first place, I want to see the videos :) I know it can be used differently by browsing the subscription page and then only get notifications from a few select channels.

I made a little video about @Veritasium's algorithm analysis, @YouTubeHelp's notification system and analytics compared up against my own analytics.


18
Electronic circuits / TIG welder teardown. ESAB TIG Caddy 1500i.
« on: June 04, 2019, 08:00:59 AM »
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A teardown of a ESAB Caddy 1500i TIG welder, a run down of the current paths in the system and I show which parts I kept.

Datasheet on the unit: https://www.esab.dk/dk/da/products/arc-welding-equipment/tig-equipment-cc/industrial-equipment/caddy-tig-1500i-2200i-ta34.cfm

19
I can get around 30 or more of these computers, new in bags, but the one I took with me home is a mystery to me and I can not make it run.

All I know about them is that they come from some sort of medical mobile solution. Marked with "PN04004002 PICUS VER 1.5" on the boards, only marking to give away sensible information, rest is just silkscreen for components.

It is a VIA VT82C686B CPU, has a CF-card with unknown content as I have misplaced my card reader, waiting for a new in the mail.

Black wires goes to a VGA port, white wires to a serial port.

I guess the black pin header is a button/LED connector, but I had no luck trying to start it that way, it connects to a P89LPC931 single-chip microcontroller. Other white headers sit near RS232 ICs.

I fed it 5V and 2 LEDs will slowly blink, but they blink faster and faster at higher voltages. 9V and its fast, 12V and it does not light up anymore. I assume it takes 5V from some markings near the connector and capacitors are only rated for 12V. In the middle of the board there is a unpopulated part where it says 12VDC.


20
I always knew that a circular saw is no joke and a kickback can quickly cost you a finger, broken bones, internal bleeding, cuts or just bruises.

I wanted to do some speed measurements from use of high speed camera and lately I had a little time to set this experiment up.

The result is that a 142g piece of wood is accelerated to 72 km/h in a mere 5 ms, so if it hits you, it is with a force of 112kg at impact (on 5 sq.cm).

EDIT: Speed difference is not speed as I used it in the video, that was an error.

Stay safe!


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