SITE NEWS

9th December 2009
I finally got around to publishing the Polyphonic Tesla Coil MIDI interrupter, it's under the microcontrollers category. Also, I now accept paypal donations via the donate button (hint, hint).

4th October 2009
What was supposed to be a small weekend project has really dragged on. At last I've finished the L/C/F Meter. See it in the microcontrollers section.

2nd September 2009
Added "GDTs for Dummies" in the misc section, also upgraded the "Multipurpose Inverter".

7th August 2009
Fixed the Boost converter PCB design.

29th July 2009
After returning home from holidays I discover my site has been down for some time due to problems with my previous webhost. I've purchased some space at 4hv.org now instead, and moved the entire website, so expect there to be no more downtime!

26th June 2009
I've started making my own PCBs, and to celebrate this I've made a small guide on how I do it, built a UV LED Exposure Box, and made PCBs avaible for the Boost Converter Capacitor charger and Flyback Driver MKII. See the PCB guide in the Misc section and UV box under Microcontrollers. I'm leaving for a one month vacation soon, so don't expect any emails to be answered.

18th June 2009
The bluetooth controlled car has been added to the microcontrollers section. Added some links to the X-ray project, and some more info to the flyback transformers page.

25st May 2009
It's finally here! The project 5 years in the making, the Dental X-ray Machine! See the physics section.

21st May 2009
COM Port Laser Turret under Microcontrollers. One project left to write about, this is the one you have been waiting for...

14th May 2009
Hall Effect Levitator now appended to the "Magnetic Levitator" article. 2 projects left.

10th May 2009
It's been an incredibly long time since I last updated, but that doesn't mean I haven't been busy. I upgraded my CW tower, see it in the HV section. I've also played with violet laser diodes, see physics. I have 3 other projects which are complete, but that I still need to write about, so stay tuned!

19th February 2009
The GrampAmp tube amplifier has been added.

16th January 2009
I've upgraded some pages over the last few weeks, The AVR Chronograph was fixed a few times, the 430J coil gun got a video and the Bench SMPS received a full overhaul. In addition I've added the 50W Capacitor charger project today.

1st January 2009
Happy New year! I completed a little side project, the ATTiny2313 VFD Chronograph. It should be highly accurate and has a nice display. In the µC section.

29th December 2008
I've finally finished the 80kV voltage quadrupler project. I also made a separate page about winding your own flyback transformers and added information about my "Big Mofo" Transformer. Everything new is in the HV section.

27th December 2008
Added a little more the multipurpose inverter page, it now includes a larger full-bridge inverter variation. I've swept through the flyback transformer page and rewritten a lot. Included information on winding your own flyback transformers.

9th November 2008
I finished rebuilding the PLL SSTC 1, it's now an entirely new coil. See it in the HV section. I corrected an error in the boost converter schematic, the charging range was set to 300 to 600V instead of the intended 270 to 450V.

1st October 2008
University has slowed projects down as much as high school I see. I've repaired the boost converter page greatly, so it now includes a description of the circuit function and has an expanded troubleshooting section. I haven't stopped working on projects however!

6th August 2008
I can't remember why I delayed posting this, anyway there's an ignition coil project in the HV section now.

3rd August 2008
A two week vacation prevented me from posting this earlier, but here it is. The PLL Induction Heater driver.

18th June 2008
Before I go on vacation I thought I'd throw up a simple little summer holiday project. USB Travel Charger.

11th June 2008
Fixed the Class E SSTC schematic and added a description of how it works.

17th May 2008
430J coil gun article has been given an overhaul.

10th May 2008
I cleaned up the Induction heater article and put some actual content in it. If it didn't make sense before it will now...

3rd May 2008
PIC-based 8 channel radio frequency remote control system finished. Used to make an RC car.

29th April 2008
I updated the Magnetic levitation page with a fixed circuit and added a picture and video.

3rd April 2008
I added a page about resonant MOTs, be sure to check it out. I've also signed up for a youtube account, so now I can put videos on my site. So far I've inserted videos of my MOT arcs, two SSTCs and Marx generator in their respective pages.

19th March 2008
I fixed the multi-purpose inverter schematic after a catastrophic failure involving one of the main filter capacitors, so if you've made one you'd better check the update. The amount of magic smoke in those electrolytics is amazing.

15th March 2008
So much for the time fountain. 180kV Marx generator and palm-top class E SSTC added.

4th January 2008
8 channel IR remote control project and Geiger counter added. I'm finishing up a Time fountain which I expect to finish shortly.