Author Topic: KPE - www.kaizerpowerelectronics.dk (see latest post for new videoes)  (Read 124324 times)

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Offline madsbarnkobTopic starter

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3x400V Mains Supply Soft Start and Data Monitor
« Reply #150 on: August 26, 2023, 06:38:35 am »
Construction of a 3 phase 400 VAC at 32A soft start circuit with safety features and a data monitor. All parts like enclosure, current transducers, voltage step down, contactors and wiring is reused from my 3 phase 13 A Lübcke variac build, that unfortunately had one of the auto transformers burn up.

Pictures and schematics: https://kaizerpowerelectronics.dk/general-electronics/3-phase-32a-400vac-soft-start-power-supply/


Offline madsbarnkobTopic starter

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Re: KPE - www.kaizerpowerelectronics.dk (see latest post for new videoes)
« Reply #151 on: October 06, 2023, 05:12:24 pm »
Part 1: Teardown of a Philips / Fujifilm PCR Eleva S x-ray image scanner / digitizer. Also known as Computerized Radiography (CR), it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with a photomultiplier tube setup. It can scan 78 plate per hour with a general resolution of 3520 x 4280 pixels in 12 bits per pixel gray scale.



Pictures and long description: https://kaizerpowerelectronics.dk/teardown/philips-pcr-eleva-s-x-ray-image-scanner-teardown/

Offline madsbarnkobTopic starter

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Part 2: Reverse engineering of laser scanner module from a Philips / Fujifilm PCR Eleva S x-ray image scanner / digitizer. Also known as Computerized Radiography (CR), it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with a photomultiplier tube setup.

Part 2 pictures and long description: https://kaizerpowerelectronics.dk/teardown/x-ray-image-laser-scanner-reverse-engineering/


Offline madsbarnkobTopic starter

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Brandenburg Alpha Series II 5 kV Power Supply
« Reply #153 on: October 12, 2023, 07:42:17 pm »
The Brandenburg Alpha Series II 5 kV Power Supply is from Great Britain and made in 1977. The model 2507r is specified for 500 to 5000 VDC at 5 mA, around 100 VA power rating.


Offline madsbarnkobTopic starter

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Re: KPE - www.kaizerpowerelectronics.dk (see latest post for new videoes)
« Reply #154 on: November 01, 2023, 07:18:06 pm »
Reverse engineering of the Fujifilm PMT26A PMT module that contains the photomultiplier tube, high voltage power supply and analog amplifier from a Fujifilm PCR Eleva S / CR-IR 357 x-ray image scanner / digitizer.



Pictures and long description: https://kaizerpowerelectronics.dk/high-voltage/fujifilm-pmt26a-photomultiplier-tube/

Offline madsbarnkobTopic starter

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Philips Medio 50 kW CP-H X-ray Control Desk Teardown
« Reply #155 on: November 12, 2023, 06:30:57 am »
I found a complete Philips Medio 50 CP-H system consisting of 2 meter tall 19″ rack with computer, driver, inverter and high voltage tank. Dual X-ray tube head rated for 150 kV and a control desk. It was only possibly for me to take the control desk with me. No effort was done for the driver, inverter and high voltage tank, as it was from the 1990’s and SCR based inverter design.


Offline madsbarnkobTopic starter

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ABB DCS400 – 900A / 522kW DC Motor Drive Teardown
« Reply #156 on: November 24, 2023, 06:46:37 pm »
Teardown of a ABB DCS401.0900 DC motor drive. It can output an insane 900A at variable voltages, for a maximum output power of 522 kW!

All pictures and information: https://kaizerpowerelectronics.dk/teardown/abb-dcs400-900a-522kw-dc-motor-drive-teardown/


Offline madsbarnkobTopic starter

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Building a New Electronics Lab, From Total Scratch! (Part 1)
« Reply #157 on: December 09, 2023, 08:38:17 am »

The long and hard journey for a better basement electronics lab is through the first phase of construction!


Offline madsbarnkobTopic starter

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Electronics For Kids - LED Christmas Tree
« Reply #158 on: December 21, 2023, 07:10:29 pm »
April, 9 years old and Alfred, 5 years old assemble and solder a LED blinking Christmas tree. Kids love to build stuff and electronics should be no exception to them!


Offline madsbarnkobTopic starter

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Server PSU Hack - Dell N870P / NPS-885AB. 12VDC 71A 870W
« Reply #159 on: January 12, 2024, 08:29:26 pm »
A video guide on how to make the, Dell N870P / NPS-885AB, server power supply run outside of its server enclosure. Through trial-and-error I found that a simple circuit of 1K resistor from ground to pins 6A and 6C is required.



Pictures and schematic: https://kaizerpowerelectronics.dk/electronics/server-psu-hack-dell-n870p-nps-885ab-12v-71a-870w/

Offline madsbarnkobTopic starter

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I found a discarded welding machine in a scrap yard! It might be an older shielded metal arc welder, also known as SMAW or stick welder. But from what my father told me, these old ESAB machines are impossible to destroy. It got a good new home :)



Technical walk-through and demonstration of spark generation from my first dual resonant Tesla coil. I finished this dual 811A vacuum tube Tesla Coil back in late 2008, which dates this back 15 years by now! At the time I finished this coil, my best camera at the time, could only record in 640x480 with horrible noise in dark surroundings. This video is the walk-through and demonstration video I wanted to make 15 years ago, but got done now :)



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