25-02-2019, 03:19 PM
I would go for something that can be reset so that you are not forever replacing fuses after derailments.
When I last thought of model railways I wondered if anyone had thought of fitting a speedometer.
Across the current limiting resistor sense with AC coupling the motor ripple and using data from the full size loco work out how many ripples the motor produces to travel its own length and convert it to speed.
From that using a constant length pulse circuit to create a drive signal for an on panel speedometer.
No need to modify the loco.
You could even add a speed limiter for models of modern locos that have them fitted.
When I last thought of model railways I wondered if anyone had thought of fitting a speedometer.
Across the current limiting resistor sense with AC coupling the motor ripple and using data from the full size loco work out how many ripples the motor produces to travel its own length and convert it to speed.
From that using a constant length pulse circuit to create a drive signal for an on panel speedometer.
No need to modify the loco.
You could even add a speed limiter for models of modern locos that have them fitted.
