Does a bear crap in the woods?
Well no if it has a 'log' rammed up it's ****!
'Bear' with me. I'm Just an old controls guy having a bit of fun with electronics in his retirement. This old bear don't always see the wood from the trees!
Anyway, thanks for your time. Appreciated the .png.
The easiest way would of course be the use of a capacitor (filter) . However this presents it's own problems.
Of course with respect to time constant matching acceleration that is a no no. We play with the 'throttle' that vary's the applied voltage and hence speed. Said acceleration is related to change in V wrt time.
The input to the TC9400 is in effect connected to the track voltage. The reason for un-smoothed 120hz V is that DC motors ( in models anyway) perform better than if the source was smoothed DC. So unless the TC 9400 is isolated from this voltage the cap would in effect try to smooth the supply to the engine which can draw .500ma to 1 amp depending on load no?. Also the polarity to the the track is reversed when we change direction of the engine. The simplest way of rectifying this would be the use of a bridge rectifier to not only source input voltage but also isolate TC 9400 from track.
With respect to using an op-amp yes great but also similar probs exist. Although we could use a bridge again it would be advantageous to supply the TC 9400 from a regulated supply. Now I am hoping that this will be ok
IF I connect ground back to source as opposed to the 'virtual' ground from the bridge. It may work ok, the bridge effectively isolating the op-amp from track supply and also changing polarity inputs when the track feed is reversed.Have I missed anything?
Any thoughts would be welcomed.
Willy