A hand in hand clock is a clock where the minute hand is mounted on the tip of the hour hand (and second on minute). This gives a clock that looks quirky and unique, but still very readable and clock like.
This clock is a skeleton edition of a hand in hand clock. This means that all gears of the clock are visible. The idea behind skeleton clocks is not to hide how it works by covering it up, but to show it off. While this is not something everything likes, it is something that I as an engineer really appreciate. For the color scheme of this clock I wanted something almost like steampunk. This left only one possible color scheme. Black and glorious gold, with brass screws. I think the result is really stunning.
After having finished the original Hand in Hand Clock, I had some people suggesting I made a skeleton clock version of the hand in hand clock. I really liked this idea. The type of clock really lends itself to a skeleton version, and I am an engineer, I don't need minimalist clocks, I want to see gears and stuff. So here we are, a Skeleton version. The mechanism is no longer hidden behind covers and frames. The mechanism is now the centerpiece of the clock.
The previous clock was made start to finish in 6 days. That is not design, that is EVERYTHING. Design was done in 2 days or about 10 hours. While it worked, it was an assembly nightmare. Some holes were unreachable, some gears had no bearings and shafts could not be properly secured without a lot of glue. This time I took the time to make a clock that can actually be assembled without glue and without getting a depression. It is easier to assemble and it runs better.
Another great improvement is that this clock uses a DC gear motor instead of a stepper motor. A stepper is easier to control, but it had a relatively big power consumption. It also produced a massive amount of noise, ticking loudly (louder than a normal clock) about every second. The DC gear motor can only be heard in a completely quiet room, and even then it only is on for about 2 seconds every few minutes. An added benefit of the DC motor is that it is a lot smaller and uses a fraction of the power. The whole clock never gets above 0.5W and has shrunk considerably in size. The DC gear motor uses a tcrt5000 optical reflex sensor and an encoder printed to one of the gears to determine the position of the motor.