Controller question
Posted: Sat Aug 03, 2013 8:59 pm
Hi,
just putting the electric system for my class 216 back together.
Does anyone of you have a Joystick controller with centre-off position? I am looking for schematics as I intend to build a controller that looks more like the driver´s dashboard.
Requirements:
-centre position - off
-up and down position to gradually increase/decrease speed
-pin-compatible replacement for the standard analogue potentiometer
I found several digital pots on the net but the datasheets of the ones I found state power-up position is 50% position. This would mean the loco would move at half speed at power-up. There are also some that store the last position at power-off. This would normally be zero, so no problem, but what if it was powered down by some fault? It would be hard to re-activate after having been disconnected at any setting different from zero.
Deadman´s switch and active brake are handled separate subsystems. All I need is that joystick and the proper schematics to make it act like the potentiometer.
just putting the electric system for my class 216 back together.
Does anyone of you have a Joystick controller with centre-off position? I am looking for schematics as I intend to build a controller that looks more like the driver´s dashboard.
Requirements:
-centre position - off
-up and down position to gradually increase/decrease speed
-pin-compatible replacement for the standard analogue potentiometer
I found several digital pots on the net but the datasheets of the ones I found state power-up position is 50% position. This would mean the loco would move at half speed at power-up. There are also some that store the last position at power-off. This would normally be zero, so no problem, but what if it was powered down by some fault? It would be hard to re-activate after having been disconnected at any setting different from zero.
Deadman´s switch and active brake are handled separate subsystems. All I need is that joystick and the proper schematics to make it act like the potentiometer.