I already tried that setup but the servo didn't move when switched to the 5V. The pot is used to set one extreme of the servo and when the resistor is switched in moves it to the other extreme depending on the resistor value.gregh wrote: ↑Tue Mar 09, 2021 8:57 am I've had a few more thoughts from my post above.
If you set the pot on the board to mid position, it can be the neutral position where the servo sits unless it is moving the points.
Then the additional resistor and switch connected to 0V shown by Bodnar, would become the position where the points move to in one direction. Then add another resistor and switch connected from the wiper but to +5V. When that switch is closed, it will move the points in the opposite direction.
I haven't tried it but it should be simple for you to try. I'd try 4.7k resistors to start.
In practice the resistors would probably need to be pre-set pots so you can adjust how far the point blades are moved.
My main issue with manual movement is that 5 out of the 8 sets of points I have do not have over centre springs, I could make them using a safety pin the same as I saw on the S&T.
The main reason I am doing this is because my manual LGB points do not move when I throw the lever, so I have to tap the blades to get them to move into place. I have tried all sorts of lubricants from light oil thru to graphite to free them up but had no luck.
I have even toyed with using throws like Rik did but they make and break a microswitch instead of having a main panel, I would just have to go to the point to throw it the same as I do now and that is still an option but if I did that I may as well just use straight rods.