The clock on TTL microcircuits, built by Instructables author under the nickname AndrewMarshall, is made in a style very vaguely reminiscent of an experimental copy of Apple 1. For greater similarity, you can cover the plywood with dark lacquer, make the top wall inclined, and exclude the blue LEDs, because then they cannot be It was. But in its current form it turned out very stylishly.
The master compiles the clock scheme without taking into account the pulse source with a frequency of 1 Hz. It can be anything: on Digispark, and on the same TTL circuits, and from a board from an arrow alarm clock, and on a K176IE12 chip, and by dividing the industrial frequency by 50 with isolation by a transformer or optocoupler, and some other one. Some of these sources will require a level converter.
On a vertical board like perfboard, which gives an additional resemblance to the prototype Apple 1 (no, this time there will be no crooked name), the master has decoders that extinguish resistors and indicators. He shows this fragment of the circuit separately:
The master has everything else on three breadboards, like this:
The first time a translator sees this homemade, in which boards like perfboard and breadboard are used simultaneously:
And this is an additional confirmation that electronics and woodworking are hobbies that complement each other perfectly, and owning both is very useful. This is how the master turns the watch case:
The master glues silicone legs to the bottom, any other non-scratching table will do:
It places breadboards in the case, and perfboard sets vertically:
Using pins or bolts, she adds a sheet of plexiglass parallel to perfboard where the controls are located:
Puts in place the front wall of plexiglass, and then glues the top cover, which clamps with a clamp. Stop, but you don’t have to do this! Suddenly, something needs to be fixed. It is better to fix the top cover with self-tapping screws - then it will be removable.
And now it's time to turn on the power of the watch, and with it the blue backlight. And since it was not in time
The master turned out such interesting watches at the junction of technology and sculpture.