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We made a small electrical device which is very useful.It is a regulated DC power supply without using tap transformer. We can get different output like 5 volt ,8 volt, 12 volt and 18 volt. It cost us less than $4. or 200 Indian rupees :)

Step 1:

<p>Very clever design, cascading down from one regulator to another to control dissipated heat vs input voltage issues.</p>
<p>Thanks for support :)</p>

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