We can convert the high voltage ac into low voltage such as 5v 6v 9v 12v dc without using the transformer which is called transformerless power supply.
Transformerless power supply 12v 500ma circuit diagram.
From the above figure c1 is used as an x rated capacitor to drop the high ac voltage.
And a whole lot more.
These type of transformerless power supplies are very handy to build contain very few parts.
To power low current demanding logic circuits and microprocessor circuits transformerless power supply is an ideal solution.
Transformerless power supply 230 volt to 12v 500ma thread starter bjtpower.
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Here is the circuit diagram and explanation for transformerless power supply.
12v power supply circuit.
But the low current efficiency makes them non ideal to satisfy high current.
Lab power supply using lm7805 lm7806 lm7809 lm7812 ics.
These are cost effective and consume less space so the gadget becomes handy.
These power supplies have distinct advantages and disadvantages.
12v 5v power supply.
The above diagram represents the transformerless power supply 12v.