As the name suggests this is an instructable where I will endeavour to show you how to make a clock tick backwards and also to draw your own clockface by hand.
Step 1: Step One
And I forgot to take a photo of the clock before I started working on it...sorry...
You will also need these tools:
Mathomat (if you don't have a mathomat you can use a ruler and something round to draw circles)
Step 2: Step 2
You can use the plastic cover from the clock as a handy bowl.
Once you have taken the hands off carefully extract the mechanism housing from the rear of the clock (you may have to sort of pop it out over a ridge or perhaps push back a pin or something)
Then, again carefully, open the back of the clock.
It should look something similar to this (your clock mechanism may not be propped up against a lighter as is shown here.)...
Step 3: Step III
Step 4: Step Four
Then, to reverse the motion of the clock, what you have to do is you have to lift the electromagnet from it's base, where it sits upon two or three pins. Carefully slide the coil of copper wire off the U shaped ferrite rod. DO NOT UNWIND OR BREAK THE COPPER WIRE! The ferrite rods are usually in two parts, so try to keep them togeather. Then turn the ferrite rod over, so that the hole in the ferrite rod still goes over the hole where the cog magnet sits.
When you turn the ferrite rod over you may find that the pegs that it sat on when it was turned over no longer fit, so you may have to remove one or more pegs.
Your electromagnet will have to be held from moving inside the mechanism, so there will still have to be enough pins to hold it from moving.
If there are not enough pegs to hold the electromagnet you have two choices, either superglue the ferrite rod to it's housing, or get a different clock.
Step 5: Step 4.11
Please refer to photographs...
Step 6: Step V
Make sure that you put the cogs back in the the order they came out in, and make sure that they are back in the right way up.
Also make sure that the teeth mesh.
And be careful!
Step 7: Step 6
Do this with care, as there are small holes on the inside of the cover that the pins on the top of the cogs must align with.
Once you have closed the cover insert a battery into the battery housing and check to see if the clock ticks.
If so proceed to the next step.
If no, now is the time to take that second clock that I told you to get and start again from Step 1.
Step 8: Step Se7en
Either you can skip the next couple of steps and just print one out on your computer, but I drew mine by hand, so to see that process follow me onwards through these next few steps...
First I thought that I could just measure my clockface and draw the numbers in, as shown by these photographs.
But, as these photographs also show, my numbers did not stay a constant size.
Step 9: Step Eight
Step 10: Step IX
Now you have to cut out your clockface and glue it to your original clockface, as shown...
Then, once the glue is dry, form a hole in the centre of the clockface, to allow access for the mechanism.
Step 11: Step 10
Step 12: Step Eleven
It will be the reverse of the order that you removed them.
They also must have adequate clearance between them, or they will not be able to rotate properly and stop mid-rotation.
Also you must replace the plastic cover over the face of the clock.
Step 13: Step XII
Step 14: The Thirteenth Step
This work is in the Public Domain. To view a copy of the public domain certification, visit http://creativecommons.org/licenses/publicdomain/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
Step 15: Addendum
Anyway, the point is, after we re-entered our house, we found everything near destroyed, as pictured below
However, I found, still hanging on the wall where I left it, still ticking, my reverse clock, as evidence below.
respect my quality