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Topics - Mads Barnkob

Pages: [1] 2 3 ... 7
1
This is 9! 12V/7A server fans built into a fan cluster with handles! It is time to wreck some havoc and play with fire and smoke!

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Deciding on what looks best or gives the best airflow, but eventually went with the arrangement that gave the easiest soldering and routing job for the wires at the back.



Modified all fans with new wires and removed all excessive plastic parts, grills and connectors. Maximum air flow please!



I did not realize just how much fire was sucked through the fans until after I saw the photage. As seen in the pictures on the forum link there was some bad damage to the fan blade and wiring. It actually short circuited the DC rails from the fence melting through the insulation. It is also very good at cleaning the work shop floor.



The teardown there came from: *Dell PowerEdge M1000E Blade Server Teardown*
I came by a discarded full size Dell PowerEdge M1000E server rack. Full SAN, 2 large blade servers, 4 or 6 backbone switches, all power supplies and fans. This is a system that is about 8-10 years old and had a new price of around 1000000 DKR (166666 $US).
It was all unloaded in a big mess into a container and I only had time/space to take a blade server, all power supplies and fans with me. Hard disks all go to destruction and backbone switches and the M1000E cabinet itself is too big and clumsy to have any real value in the work shop.

Discussion of the teardown: https://highvoltageforum.net/index.php?topic=1151.0

2
During my vacation at the island of Langeland, Denmark, I found a washed up radioprobe from a German weather balloon on the beach. It is a Vaisala RS41-SGP single use instrument in a styrofoam enclosure that can measure air temperature, humidity, pressure, speed and direction. It uses a STM32F100 microcontroller as the heart of the unit, has a UBLOX UG8010 GPS chip and a RPM411 barometric add-on board.

Not a part of the video, but it has a Si4032 ism transmitter for the 400 MHz band: https://www.silabs.com/documents/public/data-sheets/Si4030-31-32.pdf


3
Electronic Circuits / Server PSU Hack - HP DPS-800GB A, 12VDC 1000W
« on: July 11, 2020, 01:26:41 PM »
A guide on how to make the, HP DPS-800GB Rev. A, server power supply run outside of its server enclosure.

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A simple bridge between pin 31 and 34 is required and it is important to NOT drill holes through the GND and +12VDC output pads, this will risk short-circuiting the output as its a 4-layer PCB.


4
I came by a discarded full size Dell PowerEdge M1000E server rack. Full SAN, 2 large blade servers, 4 or 6 backbone switches, all power supplies and fans. This is a system that is about 8-10 years old and had a new price of around 1000000 DKR (166666 $US).
It was all unloaded in a big mess into a container and I only had time/space to take a blade server, all power supplies and fans with me. Hard disks all go to destruction and backbone switches and the M1000E cabinet itself is too big and clumsy to have any real value in the work shop.


5
There is a huge difference from the very cheap 8x8 pixel thermal cameras, to the 32x32 and up to the 160x120++. The price seems to quadruple with the pixel count. In this video I am testing the HTi HT02D Thermal camera that I was able to get at 100$ on offer. This is not a paid/non-paid advertisement, my own money, test and conclusion.

Best bet to find these at a decent price is to run through ebay and send off a lot of "make offer" of 100$ on the 150-200$ auctions. But is it worth it? Lets find out!

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6
Hi All

After passing 10.000 subscribers, it is now possible for me to activate memberships and merchandise on my youtube channel.

https://www.youtube.com/KaizerPowerElectronicsDk60

I hope you will consider crowdfunding my channel if you like to see more videos, it will still be at the pace of what is possible as a family father with a full time job. But if there end up being a lot of interest, the money can help me buy more stuff for teardowns, build more projects or buy myself more time to do videos.

Youtube also made it possible to incorporate merchandise, which is actually cheaper than my old "t-shirt" shop that goes back some 12 years. The new shop with new motives, graphics and such related to High Voltage, Tesla Coils and Nikola Tesla can be found here: https://teespring.com/stores/kaizer-power-electronics

Please do request if you want to see the graphics on other products like clothes or other that is available at teespring.


7
General Chat / Eurasian blue tit in 1000 FPS slow motion
« on: June 07, 2020, 11:32:52 PM »
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A couple of Eurasian blue tit (Cyanistes caeruleus) nested outside my work shop in one of our many bird boxes, put up to attract birds to our garden. A good 3 or 4 weeks went on with day in-and-out feeding of the young before the left the nest a week ago.

Teardowns on the inside of the workshop, new life on the outside :)

See all 5x 1000 FPS video clips from these recordings on my Slow Motion Videos channel: https://www.youtube.com/channel/UCB2qu77PCr5i9zcs0sOhp4w and please do consider subscribing to it as well.

8
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. 3x70 Watt output power.

All high resolution pictures will be published with part 2

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9
Electronic Circuits / Servomex CO2 analyser
« on: May 30, 2020, 11:06:18 PM »
Hi all

I got this smashed up CO2 analyser and thought it would make it into a teardown video, due to its state, but once I got the shield off I could see all electronics and parts was still in good shape.

I was wondering if that CO2 analyser part in the middle was worth saving for someone else? Sell the whole apparatus? or just take it all apart and see whats inside?


10
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In a celebration of reaching 10,000 subscribers on Youtube, I blew up some pieces of wire with my 2500uF / 2kV Maxwell energy discharge capacitor storing 4kJ of energy.

I also started a new dedicated slow motion video channel, please subscribe if you like to see more non-electronics videos recorded at high speeds: https://www.youtube.com/channel/UCB2qu77PCr5i9zcs0sOhp4w/

11
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Teardown of a Signet Systems HB600-24B, 600 Watt GEL Battery Charger. Also known as Genie battery charger, Skyjack or JLG. It is a OEM battery charger from Signet Systems that is sold for others brands to sell under their own name.

Specifications:
IN: 9 AMP / 100-240 V
OUT: 19 AMP / 24V
600 WATT

Alternate Part Number:
GENIE /SKYJACK/JLG
SIGNET SYSTEMS 128537
GENIE HB600-24B

12
I wanted a small Bluetooth amplifier for my work shop and bought some cheap bare-board versions from Ebay. This TDA7498 design is over-advertised, but not as bad as other cheap bluetooth amplifiers from ebay.

Test, frequency response and THD+n measurements show how good it compares to the promised performance of the TDA7498 datasheet.

Not a paid review, bought for my own money and independant rant!  I can only hope this will turn up in peoples search results if looking into buying this kit.


13
Teardown of a Eaton EX RT 5 kVA UPS model. The topology is a on-line double conversion with PFC (Power Factor Correction) system for a active power output of 5 kVA / 4 kW.

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The PFC frontend after the input section consists of a half-bridge SCR module, a Semikron SKKT 57B12E, rated for 1200 VDC at 57 Ampere.



The main inverter consists of a AC to DC converter and a DC to AC converter with the battery bank in the middle as the DC bus.

Infinion K25N120 IGBTs is used in the AC to DC inverter and Infinion G30N60 IGBTs is used in the DC to AC converter.



The controller is a Nxp Freescale MC9S12-family CPU. All MC9S12C-Family / MC9S12GC-Family members feature standard on-chip peripherals including a 16-bit central processing unit (CPU12), up to 128K bytes of Flash EEPROM, up to 4K bytes of RAM, an asynchronous serial communications interface (SCI), a serial peripheral interface (SPI), an 8-channel 16-bit timer module (TIM), a 6-channel 8-bit pulse width modulator (PWM), an 8-channel, 10-bit analog-to-digital converter (ADC).

14
Since I started working with a new SCADA platform at work, I also started a wordpress blog about best engineering Practices, problems, troubleshooting and general information that might take hours to find in documentation be available upon searching on the error messages on google instead or flipping through image search for something that fit the description.

The blog can be found at http://www.disorder.dk/wonderware/

Not exactly something that every man and his dog is going to work with, considering the price tags on these systems :)

When I was at ABB, we often used a small website full of notes, tips and tricks made by a retired employee from ABB. It was all kinds of hidden unix commands in the systems and common causes of failures and such, it really turned out more useful than he ever thought it would be, as it was just his own notes put out public :)

Anyone else that document their work experiences for the public to see?

15
I wanted a small Bluetooth amplifier for my work shop and bought some cheap bare-board versions from Ebay. This poor TDA7492P design is over-advertised and abused enough that I requested my money returned from the seller.

Not a paid review, bought for my own money and independant rant! I can only hope this will turn up in peoples search results if looking into buying this kit.

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16
Just saw this nice free, open reference design for a 15kW 3-phase 800VDC PFC frontend with all firmware, schematics, board files and BOM available on st.com, I can recommend their newsletter where I got this from today.

https://www.st.com/en/evaluation-tools/stdes-viennarect.html

I have little to no time to look it through, but hopefully someone will find this information useful

There was also a "15 kW, three-phase, three-level Active Front End (AFE) bidirectional converter for industrial and electric vehicle DC fast charging applications": https://www.st.com/en/evaluation-tools/stdes-pfcbidir.html

17
General Chat / Corona lockdown thread, tell about your situation
« on: March 13, 2020, 09:23:40 PM »
Thurday 12th March, Denmark closed down by sending home all employees of the state that did not work in health care or vital parts. To work from home. I am one of the employees that are to work from home, so in the evening I film a daily short video about the situation very short and some electronics :)
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Friday 13th March. All borders just closed here in the evening, noone are allowed to travel unless extremely necessary. Amount of cases and hospitalisations are rising. Some first deaths are now reality :( We have cancelled everything and just stay at home with our kids. Not even friends or neighbors at visit.

18
Light, Lasers and Optics / DIY 250W LED Flood Light for High Speed Filming
« on: February 17, 2020, 10:58:17 AM »
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This is part 1 of my diy led flood light that is going to be used for high speed video filming with the FPS1000HD camera.

It is being built form 5x 50W LED COBs mounted on old Pentium4 CPU coolers.

I got no affiliation with these sellers, but it is where I bought my parts:
50W LED COB chips: https://www.ebay.co.uk/itm/50-W-Watt-LED-Chip-kaltweiss-24-40-mil-4500-Lm-6000K-kw-COB-Fluter-Flutlicht/162464897645?ssPageName=STRK%3AMEBIDX%3AIT
Reflector seller1: https://www.ebay.co.uk/itm/50W-70W-100W-120W-COB-Chip-LED-Lens-Fixed-Bracket-50mm-Reflector-Collimator/112785049513?ssPageName=STRK%3AMEBIDX%3AIT
Reflector seller2: https://www.ebay.co.uk/itm/50W-70W-100W-120W-50mm-Reflector-Collimator-COB-Chip-Fixed-Bracket-LED-Lens/263468105919?ssPageName=STRK%3AMEBIDX%3AIT

19
This is the unboxing of a Anet A8 3D prrinter that was bought for my father to experiment with. Hopefully this will give some good help to make parts for electronics as part of the diy way of life :)

Following videos, in the future, will be about upgrades to the printer and test of its printer capabilities.


20
Electronic Circuits / APC RS-1000 UPS Teardown
« on: January 29, 2020, 10:21:23 AM »
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A teardown of a APC RS-1000 UPS, a run down of the current paths in the system.

Data on the unit: https://www.apc.com/shop/us/en/products/Back-UPS-RS-1000VA/P-BR1000

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