Reply to "Dimming car lights from block control"

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

WOW, that's a pretty big module. What is that, about 5" long end to end?

What exactly is that giant 3300uf capacitor doing? Given the fact that you only have 5.4 volts coming into the board, why is it rated for 25 volts? It could be a lot smaller if it were a 6v or so rated part. For instance, the Panasonic EEV-FK0J332Q, 3300uf at 6.3V is half an inch in diameter and slightly over half an inch tall.

A thru-hole part that would be more compact is the Panasonic EEU-FC0J332S, 0.709" Dia (18.00mm), height 0.591" (15.00mm)

I'd have probably used my little power module, it's .6" x .9" and about 5/8" high. It uses a cheap eBay switcher and I stack the components on top for DCS compatibility, filtering, and of course rectification of the track power. It's good for at least several hundred milliamps at any voltage.

This is the eBay switching module module I use.

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9/12/206:07 PM

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