Smoke Machine - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 13th April 2008, 09:07 AM   #1
diyAudio Member
keantoken's Avatar
Join Date: Aug 2006
Location: Texas
Blog Entries: 2
Default Smoke Machine


Well, I've been working on my coilgun project, or at least a subproject, as I first need to build something like a working tesla coil in order to build up the required voltages.

Behold, here is my circuit, and I absentmindedly plugged a 1N4001 into the place where a high-current diode should have been... My brother came in and watched. The diode's black casing actually cracked and some poured out in a ribbon from the crack. Amazingly, the diode still seemed to work! It seems that the silicon in the diode was capable of handling the heat for at least a small while, but the casing wasn't.

Click the image to open in full size.

C1 is disconnected, because with it connected I was apparently getting less current through the coil. The MOSFET is on a heatsink, though it still gets quite hot, hot enough to burn me, as I found out. Funny how I also learned that heatsink compound also turns a nice cherry-blossom shade of pink when it gets hot for the first time. This is an oscillator, and it uses the miller capacitance of the MOSFET as the capacitor. This will change with the load, as I was told, but as long as my coil doesn't burn up during the run I think it's fine. R1 determines the frequency, and so the circuit can easily be tuned via POT or trimmer. With the 330k resistor I think it oscillates at somewhere from 5-10KHz. I am powering the circuit with 4 cheap lantern batteries wired in series-parallel, to give twice the voltage at twice the operating time.

The driving coil is a flat coil of something around 10 turns, and the secondary is a solenoid wound around a transparent candy tube about 1" in diameter. with something above 300 turns. I got no sparks out of the primary, with both wire points facing each other, which was disappointing, but at least I made a nice smoke machine.

I later replaced the diode with a one I gutted from an old amplifier PSU, and it seems to be doing well. I might post pics of my setup, if there is demand.

- keantoken
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Zen V4 smoke.... rebojorge Pass Labs 8 20th December 2007 08:34 PM
T-amp up in smoke jwb009 Class D 21 4th April 2006 06:50 AM
I let the smoke out. TerryG Class D 16 8th November 2005 06:25 PM
Up in smoke... PhaseShift Solid State 2 3rd September 2002 05:03 PM

New To Site? Need Help?

All times are GMT. The time now is 09:35 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2