Language: 
To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

GDPR and DSGVO law

Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Google Search

Custom Search

Author Topic: voltage pump for coil experiments  (Read 2475 times)

Offline Belfior

  • Hero Member
  • *****
  • Posts: 562
voltage pump for coil experiments
« on: December 15, 2017, 05:36:11 PM »
Trying to build simple voltage source for my coil experiments. Simple and high enough voltage to jump a 90V - 600V gas discharge tube.

I got this built http://tinyurl.com/y9rt2tlz

Voltage stops at 220V on my 2000V DC cap. Could you tell me why it stops at 220V and what should I add to the circuit to make it go higher? I mean 220V from a 6V battery is nice, but why does it stop and can I boost it further to maybe 1000V ? Added a 10k pulldown resistor between source and negative rail and cap went to 6,5V

Offline sm0ky2

  • Hero Member
  • *****
  • Posts: 3728
Re: voltage pump for coil experiments
« Reply #1 on: December 15, 2017, 05:57:46 PM »
Try putting 2x 6v batteries in parallel?


Could be approaching the cut-off current through the
transistor gate?


Minimum values should be on the data sheet
c-e current, or sometimes cec (conductivity value)
I suspect that if you did some ohmic algebra those
numbers might be close to the same.




Offline Belfior

  • Hero Member
  • *****
  • Posts: 562
Re: voltage pump for coil experiments
« Reply #2 on: December 15, 2017, 07:15:02 PM »
Try putting 2x 6v batteries in parallel?


Could be approaching the cut-off current through the
transistor gate?


Minimum values should be on the data sheet
c-e current, or sometimes cec (conductivity value)
I suspect that if you did some ohmic algebra those
numbers might be close to the same.

Hmm the gate is fed through a function generator with 7V DC 2kHz square wave in my actual circuit. Isn't gate current separated from the source-drain source? What came to my mind is that the inductor starts to discharge back to the power source, because the "tension" on the other side of the diode is so high or the mosfet does not switch fast enough