This repository contains hardware specifications and software that together define a simple Pomodoro timer.
Under hardware/ you will find the hardware specifications:
This Fritzing sketch defines a simple circuit that drives a 4 digit 7-segment display for the timer. The sketch is ready to be built on a breadboard or exported to Gerber files and fabricated.
The header labelled '1' on the board provides inputs to two shift registers that drive the display:
- Pin 1: VCC
- Pin 2: DS (serial in)
- Pin 3: GND
- Pin 4: SRCLK (storage register clock)
- Pin 5: SCLK (shift register clock)
- Pin 6: OE (output enable, active low)
This is the Bill of Materials exported from Fritzing, updated to include supplier part numbers.
Under firmware/ you will find the software that implements the timer logic and output.
Tomato is the primary class that defines the Tomato timer logic. TomatoAlarm and TomatoDisplay are interfaces that Tomato uses to communicate to a hardware implementation (i.e.: Ardumato). A suite of CxxTest unit tests are defined in tests/TomatoSuite.h. They can be run by executing make test from the firmware/ directory.
Ardumato is a class that drives a Tomato instance with an Arduino Uno. It may work with other Arduino models, but none have been tested.