Mechanical Clock
Autonomous, aesthetically designed clock with movable magnetic digits, motion sensing, and smart alarm functionality.
Skills
CAD, 3D Printing, Arduino Programming, Stepper Motor Control, Circuit Design, Mechanical Engineering, Product Design, Metal Fabrication, Soldering, Power Management
This mechanical clock originated from a desire to build a technically impressive engineering project that would showcase my skills while also creating a functional, intelligent alarm clock to replace the phone app I was using.
The clock's defining feature is its autonomous movement system that physically displays the time through mechanical motion. The digits themselves are magnetically controlled, allowing for a satisfying "snappy" feeling when manipulated. This interactive design enables users to physically move the digits to set alarm times (for example, moving the digits to 8:00 AM to set a wakeup alarm), which the system intelligently recognizes.
The technical implementation includes: - Arduino Mini microcontroller as the brain of the system - Small stepper motors providing precise control of the digit movements - Motion sensors that detect when the clock is moved (allowing users to dismiss alarms with movement) - Built-in speaker system for alarm sounds - Rechargeable lithium-ion battery with integrated charging system
From a design perspective, I took a hybrid approach - 3D printing the inner structural components while finishing the exterior with engraved metal sheets for a professional, premium appearance. This combination gives the clock substantial weight and a high-end product feel. I even added metal balls to the base to provide stability and prevent tipping due to the top-heavy design.
The most significant engineering challenge came from the rotational design, which required threading approximately 20 copper wires through tiny holes in the rotating mechanism. Identifying and soldering these wires correctly was extremely time-consuming and technically demanding. In retrospect, the design was perhaps over-engineered, with the complexity of integrating motors, sensors, speakers, and power systems creating unnecessary complications.
Despite these challenges, the final product successfully achieves its dual purpose of functioning as an intelligent, interactive alarm clock while demonstrating advanced engineering and design capabilities.
Mechanical clock front view
Mechanical clock side view
Clock mechanism detail
Clock mechanism in motion
Full assembly view
Clock ticking demonstration