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 Members: 83989
  • *Latest: adda fan

  • *Total Posts: 892793
  • *Total Topics: 15669
  • *Online Today: 44
  • *Most Online: 103
(December 19, 2006, 11:27:19 PM)
  • *Users: 4
  • *Guests: 10
  • *Total: 14

Author Topic: Problem with lm2576 in the circuit?  (Read 2896 times)

Offline Vickysong

  • Newbie
  • *
  • Posts: 8
Problem with lm2576 in the circuit?
« on: June 07, 2017, 08:14:27 AM »
As shown in the above, the output voltage of lm2576 is a stable adjustable voltage.
Fault phenomenon: voltage falls sharply after the connection to the load, and the motor can not run.
My testing work: (1) when the load is connected, I open. The input voltage is only 2.56 V, and output is 1.56 V, which is unable to drive the motor (normally input is 7.56 V and output is 5-12 V adjusted by potentiometer). The datasheet of LM2576 is here
(2) after I replace the new battery, it is the same.
(3) I disconnect the load, the the 2576 works normally (input normally, and the output is adjustable)
(4) the resistance of motor is 0.8 ohm. unknown inductance is 2.7 ohm.
(5) the circuit diagram is incomplete because it is based on my drawing line followed circuit boards
(6) entity is a flow adjustable vacuum pump

Free Energy | searching for free energy and discussing free energy

Offline Jeg

  • Hero Member
  • *****
  • Posts: 1538
Re: Problem with lm2576 in the circuit?
« Reply #1 on: June 09, 2017, 12:50:46 PM »

(5) the circuit diagram is incomplete because it is based on my drawing line followed circuit boards

Hallo Vickysong :)
Don't expect much help when there is not any circuit drawing. Have you implemented the circuit as per data sheet? Look at page 14 of the attached datasheet.