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Topics - Mads Barnkob

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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.

2
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.


3
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

4
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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

5
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.

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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

7
Beginners / MOVED: First coil
« on: July 30, 2019, 07:31:16 PM »

8
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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

9
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.


10
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.


11
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

12
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.


13
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!


14
Beginners / Teach your kids electronics
« on: April 17, 2019, 11:51:59 AM »
I could write a long motivational letter about the importance of teaching on electronics with all its basic trades of logical thinking and scientific methods, but instead I will leave you with the happy face of a 5 year old that completes her first little project :)


15
Electronic circuits / Teardown of a GE LP-33 10kVA UPS system
« on: March 31, 2019, 10:32:18 PM »
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A teardown of a General Electric LP-33 10 kVA UPS, a run down of the current paths in the system and I show which parts I brought home with me.

Datasheet on the unit: https://apps.geindustrial.com/publibrary/checkout/GEA-D1026?TNR=Data%20Sheets%7CGEA-D1026%7CPDF&filename=LP%2033%20-%2010-120kVA%20-%20CE%20Listed%20-%20Customer%20Data%20Sheet%20-%20GEA-D1026.pdf

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This sticky thread shall serve as a link archive to valuable discussions on key DRSSTC subjects.

Overall DRSSTC design
2017-03-21 DRSSTC design guide - progress report
2017-08-10 DRSSTC inverter vs. secondary impedance inequality discussion
2017-08-28 Hydron's 160mm DRSSTC and topload current measurements
2018-07-12 DRSSTC impedance
2018-08-03 Choosing Primary impedance and Fres
2019-09-10 Breakout rod material and size vs streamer results

IGBT selection
2018-01-01 Choosing IGBTs, and adventures buying FGY75N60SMDs from Aliexpress
2018-02-07 TO-247 IGBT for DRSSTC
2018-06-16 IGBT selection - TO-247 or minibrick?
2018-12-17 TO-247 IGBT Comparison for High Frequency & Paralleled Operation

Gate drive, phase-lead and tuning
2018-02-27 What is skip pulse operation?
2018-09-21 Tuning Phase Lead / Soft switching
2019-02-24 Strange gdt waveforms

Theory and inverter / spark load simulations
2019-06-14 A dynamical arc model v2
2019-07-22 A quick way can checking f1=1/2π√L1C1 in 30 second
2019-07-22 A way for checking F2=1/2π√L2*C2 very quick

Drivers, interrupters and PCB
2017-10-07 AliExpress/ Chinese drsstc drivers
2017-12-28 loneoceans driver board
2017-12-28 Next Gen DRSSTC, UD3 driver
2018-04-19 UD2.7C Coilcraft Slot 7 (Seven) Phase Lead Inductor
2018-05-03 Combined MIDI, sound trigger, and AC burst, and constant frequency interrupter
2018-05-15 DRSSTC PCB pack release includes UD2.9 skip pulse gerbers
2018-10-30 IGBT Brick Bridge and Gate Drive PCBAs
2018-12-21 SimpleDriver v2.3, my phase-shifting QCW DRSSTC controller
2019-01-31 Chinese DRSSTC driver woes...
2019-02-26 UD 2.7C Build
2019-02-13 Aliexpress Yunbao pulse skipping Product Guide manual

MMC
2019-02-21 Bleed R's for MMC caps ?


Online tools
DRSSTC Design Guide: http://kaizerpowerelectronics.dk/tesla-coils/drsstc-design-guide/
JavaTC 13.3 online calculator for primary/secondary coupling, tuning etc. http://classictesla.com/home/javatc/
Helical Coil Calculator http://kaizerpowerelectronics.dk/calculators/helical-coil-calculator/
Spiral Coil Calculator http://kaizerpowerelectronics.dk/calculators/spiral-coil-calculator/
Topload Sphere/Toroid Capacitance Calculators http://deepfriedneon.com/tesla_frame6.html
MMC Calculator http://kaizerpowerelectronics.dk/calculators/mmc-calculator/
Good / Bad MMC Capacitor List http://kaizerpowerelectronics.dk/theory/good-mmc-capacitors/
Snubber Capacitor Calculator http://kaizerpowerelectronics.dk/calculators/snubber-capacitor-calculator/
IGBT/MOSFET Gate Drive Calculator http://kaizerpowerelectronics.dk/calculators/igbt-gate-drive-calculator/
Capacitor Energy Calculator http://kaizerpowerelectronics.dk/calculators/capacitor-energy-calculator/
Collection of Application Notes and White Papers that are useful to Inverters and Tesla Coils http://kaizerpowerelectronics.dk/tools/file-archive/?drawer=application_notes

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All MIDI files played can be found in this thread: https://highvoltageforum.net/index.php?topic=118.0

DRSSTC1 information: http://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/ which I will soon update with the rebuilded bridge

Popcorn
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Star Wars - Imperial Death March
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Dave Brubeck - Take Five

18
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Schematic and pictures: http://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/

My first DRSSTC had a unfortunate and not-so-dramatic failure. I suspect in-adequate grounding from the coils grounding bar to ground to be the culprit, I will know more once I take the old bridge apart.

Silent death during a MIDI playback, once power is turned back on, the bridge short circuits and burns outs. I quickly changed it to a SKM200GB123 inverter bridge that I had around, built for another experimental project, hence why its a little crude.

It took 3-4 evenings/nights to locate all the faults, replace parts and get it running again. I am happy.

Can you guess the song that was played?


19
DSLR / Video gear & workflow: Canon 5D mk3, Rødelink, FPS1000HD and more
« on: February 12, 2019, 08:51:43 AM »
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A walk-through and demonstration of all my video and audio equipment that I use for youtube videos.

20
Voltage Multipliers / Russian Marx generator test center torn down
« on: February 06, 2019, 08:45:25 PM »
This is a sad occasion to look at a huge Marx generator in Russia that has been torn down to make space for a shopping centre. Luckily a few Russian high voltage enthusiasts managed to save as many toroids and capacitors as they could drag away in a large trailer.

First post will be the before pictures and the second the after pictures.







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