Study Timer Add-on Kit with TM1637 4-Digit Display (No Board)
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Prices updated: 13 Oct 2026
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About this product
Add-on kit for a Pomodoro-style study timer. It starts at 25 minutes. Three buttons start or pause the timer, add 5 minutes, and reset it. When time runs out, a buzzer sounds and suggests a 5-minute break. Timing uses millis(), so the program keeps reading the buttons while the timer counts.
Specifications
- Display
- TM1637 4-digit LED display module
- Default time
- 25 minutes
- Time increment
- 5 minutes per press
- Buttons
- 3
- Alert
- Buzzer
- Recommended age
- 10–12 years
- Level
- Early intermediate
- Soldering
- No
Frequently asked questions
How is the TM1637 display connected?
The TM1637 uses two signal wires, CLK and DIO, plus VCC and GND. Connect CLK and DIO to two digital pins on the Arduino. The sketch uses the TM1637 library to show the time.
Why is millis() used instead of delay()?
delay() pauses the whole program, so the buttons would not respond during the wait. millis() tracks elapsed time without stopping the code, so the timer counts while the program still reads the buttons.
