Does anyone have the plans for a walk around thottle that has a plug system which allows the train to keep moving while you unplug and move on to a new plug in ?
I have three transistor throttles and want to move along with the train with out strangleing my follow operators on long cables.
Mike
If you’re looking for a do-it-yourself system, check out the Cooler Crawler walk around DC throttle system offered by TracTronics. (http://www.tractronics.com)
Of course, wireless DCC solves this issue completely … 
Another source of circuits is the Aramdillo and Western RR ( www.awrr.com ).
Tom
PS [#welcome] to the forum!
Kalmbach publications has a book called “Electronic projects for Model Railroaders” it has plans for a hand held throttle in it with memory…Chuck