When you turn the speed knob from the 'off' position a small amount of current flows, this may make them less than ideal for N /009 or any lightweight motor which may start to creep forward without being commanded.
BLOCKsignalling SAS2-IR Infra-Red Model Railway Shuttle Control Module Detector
Model Railway Speed Controller 12v 2 amp PWM Module & NICE 27mm Knob. Fast Del.
12v PWM Speed Control Module. 2 amp. DC Device. Screw Connections. Fast Delivery
BLOCKsignalling SS1-G Model Railway Train Shuttle Module for O G and LGB Gauge
Model Railway simple shuttle module - automated operation for OO and N gauge.
00 Scale Model Railway Diorama, Corner Module #1, with Wall and Trees.
