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Electric Toothbrush

Category :

Embedded Systems | Consumer Electronics | Power Optimization

Client :

Freelance Prototype

Start Date :

2020

Role :

Embedded Systems Engineer

Overview

Developed a rechargeable electric toothbrush powered by an ATtiny85 microcontroller, programmed in bare-metal C for maximum efficiency and precise control. Designed to deliver three speed modes with smooth transitions and minimal energy consumption.

Key Contributions

  • Multi-Speed Control — Three selectable vibration speeds for customized brushing comfort.
  • Bare-Metal Firmware — Direct register-level programming for optimized performance and power efficiency.
  • Rechargeable Power System — Integrated Li-ion charging circuit with low-power standby mode.
  • Compact Design — Embedded control electronics within a small, waterproof housing.

Tech

Arduino (C++), custom PCB.

GitHub Repo

GitHub – attiny85-toothbrush

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