Comments are moderated before they will appear on the website, this is a manual process and may take some time. Please be patient.
Author Name is a required field.
Email Address is optional, but without one I won't be able to contact you back. It is never shown or linked on the website. You can always just email me if you'd rather not post a public comment. I generally reply in-line with a comment rather than email you back, unless I want to discuss something in private or off topic. Please check back to see when I reply.
Website URL is optional, if supplied the Author Name will be hyperlinked to this URL.
You may use wikitext in the body, preview may be handy here. Don't worry if you can't figure them out, just give me a hint what you want linked to what and I'll do it during moderation. Wikitext is not BBcode!
Spammers: Please don't bother wasting your time scripting up posts to this form. Everything is moderated, your post will never be seen on the web even transiently, there is no way to even view it by its internal ID, it will never be indexed. I will simply delete your post in the moderation interface. If I'm your target audience you're really on the wrong track; I'll never click on a URL in your garbage. The post content is not emailed to me (and I don't use a Win32 mail client anyway), I view the posts in plain text in the moderation interface so no clever tricks of any kind will make anything you type be interpreted by anything other than me, a human. Just give up and go elsewhere please!
1st January 2008 16:00
Be careful running it from 24 volts, there is no current limiting to speak of and the 2SD882's Vcbo and Vceo are only 40 and 30 volts respectively.
To be completely safe you should do it by cautiously increasing the voltage while measuring the current drawn and also observing the waveforms at the transistor. Do the maths as well to ensure you aren't exceeding the ratings of the device, it is only specified for 1 watt without a heatsink and the one supplied isn't very big, plus its locked up inside the box.
Blowing up the transistor wouldn't be too bad, it can be replaced easily, but the transformer would be tough to rewind.
1st January 2008 10:31
Hi there - I got my Plasma Mug from Can You Imagine - looks identical and is really fun to have on my desk. I just touch the glass with my finger and the plasma runs all around the glass! I haven't tried it with external power yet! Maybe about 24VDC would be really interesting? Bill in Milton-Freewater
25th September 2012 16:23
bill beaty wrote...