I have always wanted the original 4757 Hogwarts Castle because it had a clock and a pendulum! I found its clock works to be a GREAT mystery until I could look into its instruction manual! 

Lego was so gracious to create the new Clock Tower and release it! I loved it very much. However, a great feature was missing: the pendulum! I decided to make minimal modifications for adding a pendulum and even motorizing it!

My Clock Tower's clock work would not be a GREAT mystery because I made a video which showed how I built it! 

 

 

 

Very, very cool mod! Can you change the speed faster or slower? 

Very impressive and accurate :) 

12 minutes ago, Seaber said:

Very, very cool mod! Can you change the speed faster or slower? 

Very impressive and accurate :) 

Thank you very much for your remarks!

Yes, the speed can be controlled. I should have added that I was using PF IR receiver and the speed remote controller for controlling the M-Motor.

The speed of the clock work in the video was either speed 1 or 2. 

I've created a BrickLink wanted list of the parts if you want to add them quicker. XML Content here: https://pastebin.com/CCmZ7afD

Cripes. If only I was clever enough to design stuff like this lol

Best part is the fig next to the super noisy motor, no sleep for you, bub!

22 hours ago, semajames said:

I've created a BrickLink wanted list of the parts if you want to add them quicker. XML Content here: https://pastebin.com/CCmZ7afD

Forgot that BL allows one to download the list in the XML format! Thank you for doing that. 

21 hours ago, Henchmen4Hire said:

Cripes. If only I was clever enough to design stuff like this lol

Best part is the fig next to the super noisy motor, no sleep for you, bub!

Hahaha, that’s true! Poor Ron! He always ends up in the now noisy Hospital Wing!

Thanks for your remark. :)

This looks very nice, although it takes some space of the hospital.

When I first saw POA, I wondered how many unsuspected students already walked against the pendulum.

On 7/11/2019 at 3:42 PM, Wout said:

This looks very nice, although it takes some space of the hospital.

When I first saw POA, I wondered how many unsuspected students already walked against the pendulum.

Taking a part of the hospital wing out is a small tradeoff. I was happy that I could keep the other half.

Hahaha, yeah, it was something that was clearly implied in the original Lego clock tower! Yet, the students only needed to wait for a short period because the pendulum swung fast for maybe only 5 seconds. 

--------------------

@montgocloud, here is what I meant by "I plan to motorize my clock tower!" Are your clock tower and the rest of your Hogwarts castle shared anywhere? I look forward to see your set up.