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Thanks! A metric clock is not too hard - three pairs of gears ratio 1:10 and one pair 1:1 to reverse direction. Member JLT posted a nifty gear designer that I use.

BTW no paper involved. I use...

This is a geared version of a metric clock I'm just finishing. (If you don't know what a metric clock is, look back to the start of this thread.) The clock is 18" in diameter. This one is going to a...

Here is the finished clock:

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Working on another unique clock. The customer provided a CAD file of this Audi R8 wheel. I used Pattern Sculptor to import the .stl and then made a few changes. (BTW did I mention this feature of...

A customer asked to have a clock made, posting this picture and story:
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"My father is retiring in April 2016 after decades of working as a software engineer. He started at Digital Equipment...

Design News accepted and published my metric clock Gadget Freak submission:http://www.designnews.com/author.asp… I built this clock for a customer in the UK, knowing that I would spend way more time...

I agree. I basically have to keep track of the error - the difference between the ideal 64 steps and actual 63.639.. - and add an additional step when the error is equal to or greater than 1.

By coincidence I recently read a paper from a trade magazine that discussed this: http://static.micromo.com/media/wysiwyg/Technical-library/Gearheads/25_gearhead_construction_use.pdf

If you use...

Ha! You read it like a standard clock, so in the photo it is 3:19:60. 10:00:00 is midnight, and 5:00:00 is noon. So hour three is more than halfway between midnight noon, or somewhere in the 7-8...

It uses the same watch crystal timebase as my pendulum clocks, as do most watches and clocks for that matter. Typical specs are 10 ppm (parts per million), so worst case about a second per day. ...

Here is the finished clock:
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This unique clock also has a unique mechanism. I used three stepper motors, one for each hand, rather than one motor and lots of gears. Here you can see the...

Back to the original project.

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Thanks.

Before I developed the microcontroller circuit that I use in my own clock designs, I had developed a more robust (than other published circuits) op amp circuit for electromagnetic...

Harry Potter clock is finished.

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I've made lake maps and I've made clocks, but I never thought to put the two together until a customer requested one. I like the idea - I ma have to make one for myself.

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Primer, sanding, primer, sanding, body putty, sanding...

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Thanks. The customer really had a lot to do with this one. And, the wings and body came from a 3D model someone else created.

Construction is completed.

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Yes. The customer gave a very good description and drawings of what was wanted. The body is basically sliced in half, and the clock's face put on it.

No one playing? I guess another hint is needed.

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This was my first time using the 1/16" long bit carving 1.5" of MDF.

Here are a couple of hints on the wings. Mine are larger than the original object. And the object is from a popular children's book.

Close. I'm using a 28BYJ-48 stepper motor and driver that was built for Arduino and similar platforms. These motors and drivers are widely available and inexpensive at less than $3. I use a TI MSP...

I don't entirely understand either, except for the novelty, but that doesn't stop me from taking on the commission!

OK, if the motor question is too hard, try this next one. These wings are part...

OK, so one idea that I had for metric clock works was to modify one of my pendulum clocks. Not too hard to design gear sets to divide by 100. And I could shorten the pendulum and reprogram the...

I often find selecting all, then copy and paste to a new project works better than changing board size.