Lionel cherry switch. How to make synchronized puffs of smoke?

Hi:

What is a Lionel cherry switch?

Regarding a different track Gauge and scale of model locomotive, if I send pulses of voltage to a smoke unit fan motor using simple chuff electrical contacts will this provide synchronized puffs of smoke? 

Thank you.

Original Post

If you are starting with a blank slate you will need at the very least a switch and a cam to activate the switch plus a source of DC to drive the fan motor. If the cam is on one of the driver axles then the number of cam lobes will determine the number of puffs. Besides the mechanical cherry switch, there are optical sensors that will do the same thing but also require electronic circuits to drive the fan motor. 

Pete

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