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Forum Index : Electronics : tl084 charge controller

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hillbillyboy316
Newbie

Joined: 17/12/2009
Location: United States
Posts: 3
Posted: 04:20am 17 Dec 2009
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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
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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
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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
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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
 
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