power supply

Server PSU Hack – Dell N870P / NPS-885AB. 12V 71A 870W

The Dell N870P power supply origins from the redundant PSU for the Dell Poweredge R710 / T610 rack servers. This article and video shows how to make it run standalone. Pictures of the Dell N870P / NPS-885AB unit and its specifications. The list of hacked server power supplies gets longer and longer. Use my guides […]

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3x400V Mains Supply Soft Start and Data Monitor

Construction of a 3 phase 400 VAC at 32A mains supply soft start circuit with safety features and a data monitor. Pictures and schematics: https://kaizerpowerelectronics.dk/general-electronics/3-phase-32a-400vac-soft-start-power-supply/ 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

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Server PSU Hack – Artesyn 7001138 IBM 24R2730, 12VDC 69A 830W

A guide on how to make the, Artesyn 7001138 IBM 24R2730, server power supply run outside of its server enclosure. It might not be a complete teardown, but I do give a quick rundown on how the circuit works, in functions. To learn how to hack other server power supplies, check out these articles. Server

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10 kVA Eaton UPS Teardown – Model PowerWare 9355

Test and teardown of a Eaton 9355 UPS (formerly the Powerware 9355). It is a three-phase, double-conversion online UPS. Output power ranges from 10-15 kVA in a changeover scenario as follows: 150% for 5 sec / 125% for 1 min (online), 110% for 10 min. Battery type is 9 Ah, sealed, lead-acid, maintenance-free. Battery charger

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Server PSU Hack – ACBEL FSA021 IBM 39Y7228, 12VDC 38A 460W

A guide on how to make the, ACBEL FSA021 IBM 39Y7228, server power supply run outside of its server enclosure. You might also be interested in reading about the Server PSU Hack – HP DPS-800GB A, 12VDC 1000W or the Server PSU Hack – EMC2 API4SG10 12VDC 300W From a Dell PowerEdge M1000E. ACBEL FSA021

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Project Documentation: Tesla Coil Soft Start Safety Box

The Tesla coil Soft Start Safety Box project has been finished. The first version of my soft start box for 3 phased 400 VAC loads was just that, a soft start box. I wanted to include safety features like fault detection and emergency stop, but I also wanted to remain galvanically isolated from the mains

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Hitachi 890-2430 Deuterium UV Lamp Test and Theory

This is a short walk-through on deuterium UV lamp theory and a test of the lamp in operation from its rather special power supply. PSU failed. Lamp failed. Complete fail. The lamp comes from the teardown of a Hitachi L7450 HPLC Diode-Array-Detector. HPLC is short for High Performance Liquid Chromatography. The DAD uses UV light

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