need to make a pulsed signal steady?

Hey all, I have a 93 Nissan 240sx, and the door chime is pretty much the most annoying thing in the world. I have therefore replaced it with one from a VW that I liked, but the problem is that the VW's door chime requires a constant 12v signal to stay on, whereas the stock Nissan chime is just an electric bell, so it takes a pulsed (square wave I guess) signal. The problem is I'm not sure how to turn that pulsed signal (probably around 1-2 Hz) into a steady 12v that will work with the new chime. I have tried using a pair of big capacitors, but they tend to make the chime stay on wayyyy too long, and one cap isn't enough. Also tried a 555 timer but it didn't really work either. So I decided to ask here and see if you guys have any ideas. :) Thanks.

Hm, you know I think I found that a long time ago when I first set out to do this.. but I was a little hesitant to try it because my relays tend to be pretty loud, and I don't really want to listen to the clicking every time the thing pulses.. but maybe I'll just go find a quieter one. :P Thanks.

Pick up a reed relay - they are silent.  You will have to tweak your values with a reed relay though because their coils require drastically less current to stay energized (so theoretically you should be able to use a much smaller cap).Kevin Pierson

The relay will only click when it engages and will not click again until it disengages.  Remember the pulses have been converted to a non-pulsed output.  It will not click with each pulse of the input.

used that same setup, not that clean but it works. the capacitor i got was pretty huge, ~0.5"dia-by-1.5". Houston,TX

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