Help with smoothing capacitor for LED dimmer

The friendliest place on the web for anyone who enjoys boating.
If you have answers, please help by responding to the unanswered posts.

refugio

Guru
Joined
Mar 8, 2012
Messages
1,284
Location
USA
Vessel Name
Lulu (Refugio sold)
In a discussion on docking lights I mentioned that I needed to smooth my dimmed LED cabin lights, and I ended up getting these smoothing capacitors:

SODIAL(R) 5 x 25V 1000UF 105C Radial Electrolytic Capacitor 10x20mm

Q1: Does the silver stripe with large "-" mean these are polarized and that's the negative side?

I'm going to install these in this circuit (where my "lamp" is a 12vdc LED light fixture that flickers when I'm plugged into shore power and charging):
BSS7507-2.jpg


Q2: Where does the capacitor go? Looking at other sample circuits on the web it looks like it should go between the RED and BLACK wires - I'm thinking that the dimmer is a variable resistor and all of the diagrams show smoothing capacitors before an inline resistor. But I could also see putting it between the BLUE and BLACK wires.

Any guidance appreciated.
 
Last edited:
Yes, you have a polarized capacitor and the stripe with the minus sign should go to ground. Typically the positive lead is longer and the negative shorter.

I don't see a problem with filtering both the input and the output.

Worse case is it doesn't do anything or maybe it won't dim.
 

Latest posts

Back
Top Bottom