Hi everyone,
about 10 years ago I made my own version of the moving Dalek head on Dr. Who. It's a fantastic addition to a great pin.
Why did I make my own version?

1. Fun!
2. Cheaper to make
3. I did not like the movement of the original (no really robotic like)

So the end result is this:

As I said, it's 10 years ago and I don't own a Dr. Who anymore. I found the schematics I made back then and was wondering what to do with them. They are not finished sellable schematics but more like notes.

I would like to help someone make a moving dalek and do so in this thread. I hope someone wants to make one and is serious about it. Perhaps someone can make a nice schematic drawing, make a nice circuitboard out of it or whatever, as long as all is posted here as original.

So, anyone interested? Or anyone have a better idea?

--------------edit----------------

So here is the schematic. I hope we can check this because I do not have a Dr.Who anymore.

How does it work?

Basically we reverse the direction of the motor when it reaches the EOS switch.
It keeps on doing this until the machine stops the motor control.
It will make a full stop because we short the Motor + and -

K1:Motor Control, Apply power to the motor
K2:Reverses polarity to the Motor
K3:Holds Polarity (Set/Reset)

EOS 2 Sets the Set/Reset Relais memory
EOS 1 Resets the Set/Reset Relais memory

Chronologically:

Motorcontrol is set > K1 is activated
Motor starts to turn towards EOS 2 (If it goes to EOS 1 first, switch + and - on motor)
EOS 2 is activated
K2 and K3 are activated
K2 reverses polarity to the motor
Motor reverses direction
K3 keeps power on K2
Center switch is passed, machine knows we are turning heads
EOS 1 gets activated, Power to K3 is lost
K3 deactivates, thus K2 deactivates and polarity is switched
Motor reverses direction again towards EOS2

etc etc

This keeps going until motorcontrol is stopped by the pinball machine.
It will do this the moment it crosses the center switch.

The speed is adjustable by setting the voltage regulator with the pot.

Who.pdf

Hi, there has been some interest so I'll make some scans of my notes.

The basics of my approach is that I have a motor that turns at the speed I want. Then when head reaches a boundary switch I switch the polarity on the motor making it run the other way. It activates the center switch which is read by the pinball machine. Then it reaches the other boundary switch and I turn polarity again etc etc.

This makes the move so robotic like and for me electronics was a lot easier to make a head turn than making it mechanicaly.

I'll post a schematic.

Sorry for not revisiting this thread. I have been out of the pinball world for a while.
I will search for the schematics, redraw them and post them.

first schematic is posted, let me know if there are any questions