Power supply positive-negative-ground from a single power supply - diyAudio
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Old 7th September 2011, 09:07 AM   #1
mome is offline mome  Thailand
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Default Power supply positive-negative-ground from a single power supply

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I like to try different circuits. Using adapters as a power source. Which it has disadvantages be it can not turn on the negative power supply.
However, this circuit can supply both positive and negative.
This circuit is used IC number NE555 set up to stable multi vibrator.It produces a frequency rectangular patch of about 100 Hz.Out to pin 3 through C3 and C4. Before the rectifier power section. Both positive and negative DC 2 series.Positive power supply will work with the rectifier D1 and D2.When a positive signal to be via D2 to the output. And filtered from C5 to filter the pressure to smooth again...........Read more
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Old 7th September 2011, 10:47 AM   #2
kubeek is offline kubeek  Czech Republic
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What What Whaaat?
If your goal is to make a noisy 100mA supply then go ahead and use it.
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Old 7th September 2011, 10:52 AM   #3
DF96 is offline DF96  England
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Why are you taking bad circuits from another website and publicising them on here?
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Old 7th September 2011, 10:54 AM   #4
Mooly is offline Mooly  United Kingdom
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These kind of circuits are great for learning though...

Tip, use high speed diodes (shottky) and increase the frequency to maximise efficiency.

It would easily supply a few opamps and could be filtered using a "capacitance multiplier". Correct ground returns for the diodes and caps are essential.
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Old 8th September 2011, 03:48 AM   #5
mome is offline mome  Thailand
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Quote:
Originally Posted by Mooly View Post
These kind of circuits are great for learning though...

Tip, use high speed diodes (shottky) and increase the frequency to maximise efficiency.

It would easily supply a few opamps and could be filtered using a "capacitance multiplier". Correct ground returns for the diodes and caps are essential.
Yes, These kind of circuits are great for learning.
But I wanted to know was published. If you do not know.
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Old 8th September 2011, 01:57 PM   #6
kubeek is offline kubeek  Czech Republic
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Quote:
Originally Posted by mome View Post
But I wanted to know was published. If you do not know.
What does this sentence mean?
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Old 8th September 2011, 11:26 PM   #7
! is offline !  United States
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When someone stops short and links to their website it is usually just an attempt to get website visitors for site ranking, advertising, etc.

Every post this member has made looks like an attempt to get people to visit wiparat . com
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Old 9th September 2011, 02:34 PM   #8
DF96 is offline DF96  England
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. . and that just links to eleccircuit.com - I'm not sure what is going on here. Why would someone want to publicise bad circuits? Let's hope we don't all find ourselves part of a botnet in a few weeks time!
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Old 9th September 2011, 05:17 PM   #9
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^ The attempt is (typically) to boost site ranking and draw in more visitors for the advertising displayed on the site, or profile tracking for later ad service. The site has two or three different trackers and a Google ad script.
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