I like this pulsed effect much better than the solid stream of smoke in your previous video.
The pulsed effect goes well with this sound card but it's very noisy when running fast and doesn't produce no where enough smoke as the TARR unit I have for Accucraft Baguley Drewery.
It's not proportional either like the TARR although it could be made to be with an additional circuit.
The video I posted of the TARR unit was running on full power just for fun. I will do a proper video of it once installed and you will see the difference particularly when on idle (I have a different sound card for the Drewery as it is a larger engine so the smoke effect needs to be different).
Fascinating stuff, Tom. I do like the pulsed smoker. Does it consume much power? Just wondeted how much drain it would be on the battery pack.
The Heng Long smoke unit in stock form has both the motor and heating element wired to the same input for power (this unit does not have a proportional circuit but one could be made). The pump motor is very loud when running fast so in my test I have the heating element running at a higher voltage (7v seems to produce a decent amount of smoke) and the motor pump running at around 3v with the idea that as power is applied to the motor the pump motor then increases in speed (voltage) to pump out more smoke (this requires a circuit for proportional control which I haven't made yet).
Given the restricted space in the loco the acoustic smoker is the option I am working on as it is smaller in size and no pump or fan is required.
If you search on YouTube for acoustic smokers the results some people have achieved are amazing.