TheBackShed.com

Home	JAQForum Ver 24.01
Log In or Join
Active Topics
Local Time 19:40 12 May 2025	Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Electronics : tl084 charge controller

Author

Message

hillbillyboy316
Newbie

Joined: 17/12/2009
Location: United States
Posts: 3

Posted: 04:20am 17 Dec 2009

Copy link to clipboard

Print this post

i build one of the tl084 charge controller and i can get the low side to kick out but i cant get the high side pot to do anything

Downwind

Guru

Joined: 09/09/2009
Location: Australia
Posts: 2333

Posted: 08:17am 17 Dec 2009

Copy link to clipboard

Print this post

Your question sounds like one of frustration.
The information you give is a bit vauge.(bit like why didnt my car start last Tuesday??)
What voltages do you read on the outputs of each opamp.
Then what voltages do you get when adjusting the high side. Is there a difference?
What is your battery voltage?

A quick look at the schematic i question if the resistors on the base pin of the BD139 transistor are shown around the right way.
I will leave that to be answered by someone more fluent with this circuit.

Pete.

Sometimes it just works

hillbillyboy316
Newbie

Joined: 17/12/2009
Location: United States
Posts: 3

Posted: 02:21pm 17 Dec 2009

Copy link to clipboard

Print this post

im a newbie at this and not quite sure how to check all of that

hillbillyboy316
Newbie

Joined: 17/12/2009
Location: United States
Posts: 3

Posted: 12:07am 18 Dec 2009

Copy link to clipboard

Print this post

ok i got it fixed. i just went ahead and built another board with all new components and now its working, so i either had something bad or a bad connection somewhere

Print this page

To reply to this topic, you need to log in.