DIY 250W LED Flood Light for High Speed Filming, Part 1 of 2.

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:
Reflector seller1:
Reflector seller2:

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Anet A8 3D Printer Upgrades: 12V Power Supply From a Server

This is the first upgrade for the Anet A8 3D printer. A new powersupply from a HP server will be a fire-hazard reducing upgrade compared to the original undersized and over-specified power supply that came with the printer.

12V @ 62A is of cause much more powerful that needed for the printer, but this will keep the fan spinning at minimum speed. You do not want to be in the same room as a server power supply running at full current output with maximum fan spin. It is like a jet engine.

Below is the schematic for a HP DPS-750RB Rev. A server power supply, standard model number HSTNS-PD18.

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Anet A8 3D Printer Unboxing

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.

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APC RS-1000 UPS Teardown

A teardown of a APC RS-1000 UPS, a run down of the current paths in the system.

Data on the unit:

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DSO138, Not Even Once

Before you buy a DSO138 or DSO150 from ebay, amazon, wish or aliexpress, it is important to understand what you are getting. The specifications are very loosely written and what looks good on paper is useless in practical use. Here I test the DSO138 specified at 200 kHz, but in reality it is worthless above 20 kHz.

Buying the right oscilloscope is knowing your work area limits and where it might be in the future. I recommend that you read: 12 things to consider when choosing an oscilloscope:

For the Nyquist applet to play with:

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Chinese 150 Watt Induction Heater, unboxing and test.

Review and test of a mini induction heater. At just 12V 10-15A you can have a small and effective induction heater for your work bench.

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10 kVA Kjellberg Plasma Cutter CUTi 31 Teardown

A teardown of a Kjellberg CUTi 31 Plasma Cutter with a power rating of 10 kVA. Made for cutting in 25-30 mm steel.

Connecting voltage (V): 3x 400VAC
Connecting power (kVA) 10.4
Mains fuse, slow(A) 16
Open circuit voltage (V) 240
Cutting current (A) 20…70
Duty cycle 70A/35% or 50A/100%

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New Year Special – Yspace? Static Rocket Engine Test! 3 Boosters + Slow Motion

Happy New Year and best wishes for a wonderful 2020 to you all!

Thank you to all followers, subscribers and members and

A second video, end of the year comedy/spoof! Can tradition be broken by second video on second year?

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How To Fix A Broken iPhone

Merry Christmas and a Happy New Year!

How to fix a broken iphone, shoutout to Louis Rossmann 🙂

This years seasonal greetings is a bit of comedy.

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Julabo ED Heating Immersion Circulator Test and Teardown

Test and Teardown of a Julabo ED heating immersion circulator from a decommissioned laboratory.

JULABO immersion circulators for controlling temperature +20 to +150 °C in any bath tank up to 50 liters. Parts that are immersed in bath liquid are constructed of stainless steel or synthetic material. Common applications include controlling the temperature of samples, temperature testing of articles, materials testing, and evaluation, adjustment, and calibration or thermometers and thermal switches.

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