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NYC RESISTER

Last night I attended NYC Resister for the first time… wow. Really impressive. Talented, well equipped, and fun. In 5 hours I went form zero knowledge to a working computer controlled stepper motor...

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Superconducting Cable

On Dec 4th 2008, I ordered 20 meters of 4mm YBCO superconducting cable from theva. The lead time is 8 weeks, so it hopefully will arrive at the end of January 2009. This should be more than enough...

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Reactor Controller / Data Acquisition

Since the pump broke I’ve been working on the reactor controller / data acquisition system. This will allow us to record: Voltage reading (via voltage dividers and ammeter shunts); low power voltage...

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Computer Controlled Sorensen Hack

Sweet! Just got the high current (120 Amp) Sorensen power supply working with computer control (to power the superconducting magnet). Here is a video: Details after the jump. The Sorensen SRL 10-100...

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Mass Flow Controller Online

Big day. Big win. Big upgrade. Got the mass flow controller online! First we got a +/- 15V power supply on eBay for $30: Real nice Lambda. 3.3 Amp. Wire up the AC side: Solder the pins on the 9 pin...

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Transient Voltage Suppression

When the fusor’s plasma becomes unstable and sparks, it makes my DAQ crash. This is likely due to transient voltage spikes in the wires, or electromagnetic interference through the air. I’ve been...

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IGBT

  All photos. Yesterday I got the IGBT working under computer control. I switched my desk lamp on and off from my computer. The IGBT will be used to switch up to 90 Amps going into the superconducting...

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Arduino Controls 30,000 Volts

All photos. Today I made arduino control 30,000 volts. My arduino has 3 channels of analog output 0 to 5 volt. For testing I used this sin wave generator sketch:     int pwmPin = 9; // output pin...

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Electron Gun Power Supply

all photos (1/2)  all photos (2/2) The light bulb electron gun test had to be put on hold because we didn’t have suitable power supply, so we built one. Here’s the schematic: The schematic of the power...

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Power Supply Upgrade

All photos(1/2) All photos(2/2) During the first trial, our langmuir probe told us that our electron beam intensity was fluctuating at 60 Hz. This is a problem, because one of the main things we are...

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