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POWER TRANSFORMERLESS 12V

POWER TRANSFORMERLESS 12V

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  IDEA ELECTRONIC PROJECT

ELECTRICAL WIRING
The power supply circuit is formed with a capacitive drop system (C1), stabilizes the rectified mains voltage on one half-wave via the Zener diode DZ1.

ATTENTION: The assembly is submitted directly to the mains. It must therefore be careful not to intervene on the plate with bare hands or with metal tools without previously assured of the absence of current sector.

PRACTICAL REALIZATION
The assembly do not pose any particular problems, comments are superfluous.
However, remember to ensure the sense of commitment of polarized components. Check the quality of the welds.
Handle the device carefully because the presence of 230 volts to the circuit can make it dangerous.

NOMENCLATURE

R1 = 100R 1W 
C1 = 1MF 400V MKT 
C2 = 1000 MF 16V élec. 
C3 = 100 nF MKT
D1 = 1N4007 
D2 = 1N4007 
DZ1 = Zener l2V 1W 
JPl = Bornier 
Circuit imprimé

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