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The most Dangerous, yet Cheapest Mains Power Supply! Building a Capacitive Dropper Circuit!

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Rating: 4.0; Vote: 1

The most Dangerous, yet Cheapest Mains Power Supply! Building a Capacitive Dropper Circuit! Andrew: What I keep wondering about is this: the appliances in the home that get increasing use are electronic: LED lights, televisions, computers, cell phone chargers, wifi, maybe the IoT appliances that are coming real soon now. You need to power kitchen and laundry appliances, HVAC, water heaters with grid power, but that's only a portion of a house. Is anyone thinking about a lower voltage AC or DC home power standard for lower power electronic appliances, possibly with other features comparable to PoE? Granted, a television has different DC power requirements than a cell phone charger, but might it make more sense to have a tough grid-AC to low-power adapter to go to electronics rather than a plethora of wall wart supplies everywhere?
Date: 2020-09-05

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Comments and reviews: 9

Justin
Just shows how easily you can kill yourself with mains power. It did not occur to me the 5 volt side could be so off from Earth potential. I think a good rule is to assume any part of a circuit connected to mains could kill you.
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Arnab
Hello, GreatScott. All your videos are very informative.
Can you make video on LNK304PN IC.
It's like less Cheapest Mains Power Supply. I'm not sure, there are very less info about this IC.
Thanks.
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charmin
What if 5V I want to power a 5V Relay, should this capacitive power supply then be used, I want a concise 5V, 200 mA power supply circuit.
Please suggest a capacitor for this of best value.
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Balkrushna
8: 26 don't we need to subtract that zener voltage (5. 1v) from that 233volts AC voltage and then divide it with calculated reactance to get our current value.
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Bert
What happens if you eliminate the series resistor? I made a circuit just like that but with a resistor in series to the Zener diode and it SEEMS to work fine
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Luiz
Power Factor being terrible is actually a good thing for residential use. I'm buying all my LED lamps with cap drops now, that way I save money on power.
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Sundar
Types of Warning
GreatScott: Mishandling of power supply may lead to fatal injuries
Electroboom: Don't kick live voltage, it will kick you back!
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education
11: 00 sadly great scotty, the chinese chargers cannot offer that isolated output.
thats why its not recommended to buy chargers in China
reply

Nothings
Electro Boom and Great Scott Colap
Great Scott Says Mains Vortage is dangerous
Electro Boom Graps the Power line and says on More time
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