Dramatic voltage drop at voltage regulator output

[Baluncore]

okay. I think I found the problem. When the regulator is loaded with a 12 ohms resistor, the battery voltage drops from 12V to 3.4V . I've tried a couple new batteries, still the same problem.

Well done.
What type of 12 volt battery are you using, make, model, chemical technology and capacity?

 

[jim380]

Well done.
What type of 12 volt battery are you using, make, model, chemical technology and capacity?

http://www.digikey.com/product-sear...t=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

I'm using this one.

 

[Baluncore]

Data shows discharge Rate = 480µA
It is doing very well to produce 150 mA.

 

[jim380]

Data shows discharge Rate = 480µA
It is doing very well to produce 150 mA.

Yes. I figured. I also tried powering the 6v regulator using a power generator in my lab. Everything works fine when loaded with the same resistor. I'm literally running out of ideas.

 

[Baluncore]

If you have a lab supply that works, how come you are running out of ideas?
You need to get either an 8V to 12V power supply rated at 1 amp output that runs from the AC mains,
or a 12V gel cell with sufficient capacity to produce 1 amp.