V2 - Simple low power 230VAC to 5VDC power supply

187

02:21:59

This circuit is designed for MCUs and low power components. You will need to tweak this according to your own peak current needs. This circuit has no idle current and therefore efficient while the system is at rest (wrong, the idle current is high, I'll fix it.). It further is capable of delivering upto about 100+mA at 5v.
The latest addition is a variable and stable voltage regulation with potentiometer.
The 20v zener protects the MOSFET gate from a higher than 20v GS voltage difference. 
This circuit is dangerous, since it has no galvanic isolation to the mains power. Therefore, no wires must leave the box that you plan to put this in. It is a power supply for a specific device, and not a power box. (take care)

published 6 years ago

lenzrulz

6 years ago

Thank you for sharing...👍

lenzrulz

6 years ago

Same circuit tidied up: http://everycircuit.com/circuit/5091642051395584

hurz

6 years ago

almost all current is bypassed by the so called bleeding resistor which is normaly very high in resistance e.g. 470kOhm. The idea of a capacitive dropper is gone with this 300 Ohm resistance. Anyway, 110Watt power dissipation of this resistor as result is not what you was looking for. Lenny do not know, hes just bootlicking here and there cuz the nbr of friends is decreasing every day, if this can be going down more then todays zero. Take care with unisolated ultra high power wasting circuits, they are a nice fireworks. 💥

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