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Offline mrbeenTopic starter
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« on: October 23, 2019, 02:38:39 pm »
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 Hello
Can you help with below circuit
 I made but  It is  not working,
It is called German pulse or ...
I am suspicious on voltage regulators,.7809 and 7909
But l am just a beginner.


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Offline GoldDigger1950
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« Reply #1 on: October 25, 2019, 05:49:34 pm »
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The 7809 is a positive 9v or +9v regulator. The 7909 is a negative 9v or -9v regulator.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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« Reply #2 on: October 29, 2019, 02:11:20 pm »
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 Hello
Regulators 7909means
Ground--  in voltage -- out voltage,
From left to right,
But if you look at schematic
 where the battery connects,
Ground  come into the middle
 leg of regulator
Which does not seems to be right.
It looks some thing is wrong there!!!....
Thanks for your help


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Offline GoldDigger1950
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« Reply #3 on: October 30, 2019, 11:12:13 am »
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Sadly, we don't have the schematic to help you.

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« Reply #4 on: November 12, 2019, 10:08:50 am »
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It comes under different names like tl 12000 or DX7000 or
 DX8000 or 12regulator
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