5V DC Transformerless Source Design

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Thread Starter

Carlos Martínez 1

Joined Nov 23, 2016
Hello, I would like to make a 5V DC source without any Transformer knowing that the Electric Outlet voltage is 120 Vr.m.s, I found this circuit:

C3 = Polyester Capacitor
D1-4,6 = 1N4001 0.7Diode
C2= 470 Electrolytic
Dz= 6.8 V
Regulator = MC7805
C4=100n Ceramic


But for lowest Loads R1<500 Ohm, the Voltage drops, so any modification or circuit I can do for my circuit?

Moderators note : removed dangerous circuit
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Joined Apr 5, 2008

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Restricted topics. The following topics are regularly raised however are considered "off-topic" at all times and will result in Your thread being closed without question:

  • Any kind of over-unity devices and systems
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  • LEDs to mains
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