Alright guys, so I just heard that there are some 4channers spamming the popular tags on here with gore/rape photos that can be triggering to some people. I highly advise everyone to stay away from these tags for a while until it clears up:



#fat acceptance


#womyn of color



#unleash the dragons

#unleash the dragon

#the dragon stare


#rape culture





#attack on titan





#doctor who












Watch on www.kontraptionist.com

They named it “Coup de Foudre” and this is the type of stuff being built at the shop in Los Angeles… just not by me personally. My only involvement in this project was lending these guys my oscilloscope, which, by some miracle, is still alive. This is a “solid state” Tesla coil - Meaning no weirdness with spark gaps and neon sign transformers, just pure hockey puck size transistors.. Actually, not transistors per se, but something known as an IGBT, which stands for Insulated Gate Bipolar Transistor. These are the most bad-ass semiconductor switches currently available, and they enable this Tesla coil to vary it’s output frequency and duty cycle, which is all fine and good from a technical standpoint, but when you realize that you can use it as an absurdly dangerous MIDI instrument…Watch out. That’s RIGHT! Plug this bad  boy in to your CASIO keyboard and play it like a lightning piano, or anything with a MIDI output. 

The power supply for this monster is also quite impressive - 600V three phase, 15KVA, which comes up to around 700+ volts after rectification to DC. When it’s all said and done, the final output is about (at last guess) TWO MILLION VOLTS. 

And of course they’re taking it to Burning Man to sing Karaoke out of it. 

Global IGBT and Super Junction MOSFET Market Expected to Reach USD 10,100.0 Million by 2019: Transparency Market Research

Global IGBT and Super Junction MOSFET Market Expected to Reach USD 10,100.0 Million by 2019: Transparency Market Research

Albany, NY (August 21, 2014) (CULRAV.ORG) -

According to a new report titled”IGBT and Super Junction MOSFET Market – Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2013 – 2019,” the combined global market for IGBT (Insulated Gate Bipolar Transistor) and super junction MOSFET (Metal-oxide Semiconductor Field Effect Transistor) was valued USD 4,776.2 millionin 2012 and is…

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 同社は鉄道車両に開発中の1.7kV/1.2kAという大電力用途のモジュールを、2012年7月に開催されたTECHNO-FRONTIER 2012で展示した。8個のSiC SBDと4個のIGBTを組み合わせたものだ。ダイオードにSiCを採用するだけでも「インバータ部で損失を30%低減できる他、モーター部で同じく40%、『全速度電力回生ブレーキ』では機械的損失で失われていたエネルギーをほぼほぼ全て回生電力として回収できる。これら全ての効果を合わせると、SiC採用で鉄道車両として30%の省エネを実現できる見込みだ」(三菱電機)とした。開発品は一部の鉄道車両において実用化されている。

Yongnuo Yn-460 Ii Flash Speedlite Light for Sony A100 A850 A580

Yongnuo Yn-460 Ii Flash Speedlite Light for Sony A100 A850 A580

Brand: Yongnuo

  • Color Temperature:5600K
  • Power Source:4 X AA size batteries (Alkaline or Ni-MH are usable)
  • Flash Mode:M,S1,S2
  • Flash Duration:1/200S -1/20000S
  • The flat, one-piece plastic screen has been replaced

Flash index: 33 Circuit design: IGBT Up/down ward angle: 0 to (more…)

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 米International Rectifier(IR)社は、最大出力電流が6Aと大きいデュアルチャネル構成のEV/HEV向けロー・サイド・ドライバーIC「AUIRB24427S」を発売した。大電流を流せるIGBTやパワーMOSFETの駆動に向ける。主な用途としては、電気自動車(EV)やハイブリッド車(HEV)に搭載するスイッチング電源や、大出力の産業用DC-DCコンバーターなどを挙げている。 http://dlvr.it/6mhR37

IR Launch Welding IGBT

by elektor.com: International Rectifier have announced the introduction of the IR66xx series of high performance 600V ultra-fast Trench-gate Field Stop insulated-gate bipolar transistors (IGBTs). The new high power family of devices features extremely low conduction and switching losses optimized for welding applications. Utilizing Trench thin wafer technology to offer lowest conduction and switching losses, the new […]

from Electronics-Lab.com Blog


I visited the local surplus electronics store today and picked up an IGBT (a type of transistor switch) module for 9.99. Using stuff I had laying around, I built a proof of concept light that has variable flash duration. At some point after the arc is initiated in the tube, I shut off current flowing to the tube using the IGBT. In this case, 1/15624th of a second.

IGBTs are easily damaged by static electricity, and the one I bought was in a bin with it’s brothers with no anti-static precautions whatsoever. I’m guessing mine came from a 500kw UPS used to keep a LOT of computers online during power outages. At one point, several loud pops came from the device. I think it was shedding features it did not need. :-P Either that or it has suffered damage from static electricity and it’s about to blow up big time.

I was using my trusty 404 pack for the testing. I can crank it up to full power and create just the tiniest flash of light. Were it not for the IGBT, this little flashtube would be history. It’s rated for 800ws and the pack is 4000.

Squeee! Electicity is fun. Just check out that sweet arc plasma!