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 : ) help us to bring you our services at . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
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.
Amazon Warehouse Deals ! Now even more Deep Discounts ! Check out these great prices on slightly used or just opened once only items.I always buy my gadgets via these great Warehouse deals ! Highly recommended ! Many thanks for supporting this way.

User Menu

Tesla Paper

Free Energy Book

Get paid


Please Donate for the Forum.
Many thanks.
Regards, Stefan.(Admin)




3D Solar

3D Solar Panels

DC2DC converter

Micro JouleThief







Magpi Magazine

Magpi Magazine Free Rasberry Pi Magazine

Battery Recondition

Battery Recondition



YT Subscribe

Gravity Machines


Magnet Secrets

Lindemann Video




WaterMotor kit


  • *Total Posts: 893984
  • *Total Topics: 15710
  • *Online Today: 44
  • *Most Online: 103
(December 19, 2006, 11:27:19 PM)
  • *Users: 2
  • *Guests: 14
  • *Total: 16

Author Topic: Detecting Resonance  (Read 470 times)

Offline JulesP

  • Newbie
  • *
  • Posts: 12
Detecting Resonance
« on: January 03, 2021, 11:49:13 AM »
Hi all,

I am developing a type of Phase Locked Loop based power supply for testing the performance of a variety of different types of electrolysers and, while the key components of the PLL work fine in generating a gated pulse, I am having trouble detecting resonance of the circuit. Theoretically, the layouts shown in pic 1 should behave as an LC circuit, and this has in principle been verified using the simulation software LTSpice (see Pic 2) albeit at a lower frequency than my circuit will resonate at. Using distilled water the electrolyser behaves as a capacitor, although it is not straightforward to measure its value in regular ways so I have resorted to calculation methods.

So with the circuit shown in Pic 3, I have been trying to get the PLL circuit to detect when resonance occurs and then to lock onto that frequency but, despite using a suitable frequency detection range suited to my cell, have been unable to do so. In fact, when I use the detection coil shown wrapped around the bifilar coil, the HF component of the PLL circuit vanishes perhaps due to the coil presenting a short to the two inputs of the op-amp.

So my question is: how have others detected resonance in this type of circuit when using a PLL or similar system to lock onto it?

Thoughts welcomed.



Free Energy | searching for free energy and discussing free energy

Detecting Resonance
« on: January 03, 2021, 11:49:13 AM »