Capacitor as current limiter

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xodbox

Joined May 31, 2012
1
Hi,

I want to limit the current through a resistor using a capacitor in series with the resistor. The resistor has 16ohm, and it will be connected to 127V AC. I will be using a 55uF capacitor, so the current through the circuit will be 2.5A. The circuit must work 24/7. Does anybody know if there is an issue with this setup?

Thanks
 

baby_1

Joined Jun 3, 2011
39
Hello
as you tell us the current is alternative and I(RMS)=2.5?
if you use a resistor with 16ohm value the Power dissipation=R*I^2=16*2.5*2.5=100W
 

SgtWookie

Joined Jul 17, 2007
22,201
We do not support discussions on transformer-less power supplies, as they are inherently unsafe.

You must use a transformer to provide galvanic isolation from mains power.

The price of a transformer is a bargain compared to the cost of a funeral. Please do not attempt your idea.

Excerpt from the ToS:
6. 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
  • Automotive modifications
  • Devices designed to electrocute or shock another person
  • LEDs to mains
  • Phone jammers
  • Rail guns and high-energy projectile devices
  • Transformer-less power supplies
 
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