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Unread 11-23-2011, 02:37 PM   #1
Not Yet Wild
 
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Default Battery Charger Tester

Hello Guys,

I am trying to test a battery charger with a battery simulation. I have a source follower configuration circuit with op-amp for voltage differential. I Keep running into different problems as my out keeps oscillating when ever current starts flowing into the circuit. Any suggestion or ideas?
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Unread 11-23-2011, 05:00 PM   #2
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Default Re: Battery Charger Tester

that's like calling the dentist on the phone to tell you what's wrong with your teeth........


you gave no schematic information as to your test circuit.
so i suggest you check tooth #3
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Unread 11-23-2011, 06:08 PM   #3
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Default Re: Battery Charger Tester

Welcome to BGW!

Go easy on him, Bruce. It's his first post! LOL!

adex, we need more data......
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Unread 11-23-2011, 11:40 PM   #4
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Default Re: Battery Charger Tester

Sorry guys. This is the schematic
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File Type: jpg schema.jpg (9.7 KB, 19 views)
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Unread 11-23-2011, 11:49 PM   #5
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Default Re: Battery Charger Tester

I hope this is clearer
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Unread 11-28-2011, 08:59 AM   #6
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Default Re: Battery Charger Tester

That looks like hieroglyphics to me

Why not plug it into a battery pack and see if it works?
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Unread 11-28-2011, 05:56 PM   #7
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Default Re: Battery Charger Tester

adex, welcome to the forum!

certainly not trying to discourage you from participating here, but your question is a little outside the scope of this forum's troubleshooting skill set. if you are not a member already, i would highly recommend joining the EEVBlog forum. nerd is their first language!

is that tina? those look like burr-brown/ti part numbers, but i can't make out much else...
-sj
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Unread 11-28-2011, 06:18 PM   #8
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Default Re: Battery Charger Tester

Quote:
Originally Posted by adex View Post
Hello Guys,

I am trying to test a battery charger with a battery simulation. I have a source follower configuration circuit with op-amp for voltage differential. I Keep running into different problems as my out keeps oscillating when ever current starts flowing into the circuit. Any suggestion or ideas?
Considering most golf cart charger are pulsating DC. And not pure ...have you tried placing an electroletic Capacitor across the charger output to smooth out the wave. Especially if the recification in the charger is only 2 diodes instead of a bridge
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