Search found 80 matches

by Nicolas Krause
Fri Jul 24, 2020 3:30 am
Forum: Interesting Links
Topic: Applied Science - Diffusion Pump
Replies: 0
Views: 238

Applied Science - Diffusion Pump

I'm sure plenty of people are aware of the channel, but he just posted a lovely video explaining in depth how a diffusion pump operates. He's got a big glass one and you can see it operating, its fascinating!
https://www.youtube.com/watch?v=SrNVLCHrJtY
by Nicolas Krause
Wed Jul 22, 2020 10:20 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 102
Views: 32894

Re: Vacuum Chamber Construction

Very happy to report that after a quick welding session, the welds appear to be sound. Visual inspection identified a couple of small holes, and just to be on the safe side I welded a few more spots that looked suspect. I repeated the soap and water test with the bicycle pump and no bubbles appeared...
by Nicolas Krause
Fri Jul 17, 2020 7:23 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: HF switcher supply construction and voltage multiplication
Replies: 37
Views: 4862

Re: HF switcher supply construction and voltage multiplication

Hi Pierre, I just thought I would add my two cents, I've been working on my fusor for a very long time. I think I found this site back in 2010 initially, and couldn't understand anything here. I only started buying actual parts for my device in 2015, when I went back to school for electrical enginee...
by Nicolas Krause
Fri Jul 10, 2020 1:05 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 102
Views: 32894

Re: Vacuum Chamber Construction

Hi Rich, the bubbles are very clearly coming from the connection of the hemisphere to the ring, and the hemisphere's don't rock against one another when I press them together, so I think the most likely culprit at the moment is the weld itself.
by Nicolas Krause
Fri Jul 10, 2020 12:41 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 102
Views: 32894

Re: Vacuum Chamber Construction

I was concerned about missing leaks on the underside of the chamber since a lot of the soap solution had dripped off, so I just completed a second leak test in the bathtub. Virtually all of the leaks appear to be coming from one of the main rings on the hemisphere. I'm unable to see any other bubble...
by Nicolas Krause
Thu Jul 09, 2020 11:31 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 102
Views: 32894

Re: Vacuum Chamber Construction

Dennis I appreciate the kind words, but reality is a harsh mistress. Looks like I'm going to be redoing some of the welds!
IMG_1106[1].JPG
by Nicolas Krause
Thu Jul 09, 2020 4:42 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 102
Views: 32894

Re: Vacuum Chamber Construction

Just a quick update. I've got the chamber all assembled, and sitting on its frame. While I'm sure in the future I'll like having so many ports, at the moment it's mostly a lot of tedium anytime I try and put it all together. This is the second time putting it together today as earlier I was nearly d...
by Nicolas Krause
Sat Jul 04, 2020 2:34 am
Forum: Vacuum Technology (& FAQs)
Topic: LCD Vacuum Sensor
Replies: 5
Views: 1393

Re: LCD Vacuum Sensor

Just a quick update here, I've decided to swap out the screen for a simpler text LCD. I was looking at the programming task ahead of me, and it required writing some graphics drivers for the dot matrix LCD. Rather than struggle with that task in a new language, I figured it was better to go for a si...
by Nicolas Krause
Sat Jun 27, 2020 8:45 pm
Forum: Vacuum Technology (& FAQs)
Topic: LCD Vacuum Sensor
Replies: 5
Views: 1393

Re: LCD Vacuum Sensor

If I were in your position I probably wouldn't be doing this either Richard! But I'm learning a new programming language, I have a design in mind for the PCB that I quite like, and I think this will be a very nice little project. The first goal of this whole Fusor project is to learn, and this is he...
by Nicolas Krause
Fri Jun 26, 2020 3:34 am
Forum: Vacuum Technology (& FAQs)
Topic: LCD Vacuum Sensor
Replies: 5
Views: 1393

LCD Vacuum Sensor

To use my thermocouple vacuum gauge and to continue improving my embedded development skills I've been working on programming a TI Tiva C Launchpad via the MeCrisp Stellaris language to read a value from the vacuum gauge and then print the value to the screen. It's been slow going, as I'm new to For...