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3 timers with 7-segment displays
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Electronics
- Licencja
- Creative Commons — Attribution — Noncommercial
3 timers with 7-segment displays
I was searching for an easy to use LED timer with 3 individual timer times shown at once but I could not find one. So I made this one I would like to share it with you too. =)
Functions:
- 3 separate timers counting down to 00.00.00.
- The remaining time of the timers is shown in the 3 different 8 digit 7-segment displays.
- The timers tick down each second.
- The timers can be started, stopped and deleted individually.
- The running timers can be deleted separately or together.
- Planned functions in one of the next versions:
- Notification about the timers with Telegram to your smart phone.
- Hide timer display when timer not set.
- Replace 1,2,3 at the beginning with A,B,C. Currently a bug in the Arduino library.
Usage:
| Input: | Result: |
| A011545 | Sets timer A to 1 hour, 15 minutes and 45 seconds and timer starts |
| B124559 | Sets timer B to 12 hours, 45 minutes and 59 seconds and timer starts |
| C065535 | Sets timer C to 6 hours, 55 minutes and 35 seconds and timer starts |
| DA | Deletes timer A |
| DB | Deletes timer B |
| DC | Deletes timer C |
| DD | Deletes all timers at once |
Parts needed:
- 1x ESP32 NodeMCU
- 1x 4x4 Matrix keypad
- 3x MAX7219 LED 7-segment display TM1637
- 1x Micro-USB cable
- 1x USB 5V/2A power supply
- 1x Some wires in different colors
- 6x M3x35mm countersunk screws
- 1x Small cable tie to secure the USB cable and ESP32 in the case
Wiring instructions:
| ESP32: | Display A: | Display B: | Display C: | Keypad: | Wire color: |
| 3V3 | VCC | VCC | VCC | red | |
| GND | GND | GND | GND | black | |
| G27 | DIN | green | |||
| G12 | CS | white | |||
| G14 | CLK | grey | |||
| G33 | DIN | green | |||
| G26 | CS | white | |||
| G25 | CLK | grey | |||
| G15 | DIN | green | |||
| G32 | CS | white | |||
| G13 | CLK | grey | |||
| G19 | 1 | white | |||
| G18 | 2 | brown | |||
| G5 | 3 | orange | |||
| G17 | 4 | grey | |||
| G16 | 5 | yellow | |||
| G4 | 6 | purple | |||
| G0 | 7 | blue | |||
| G2 | 8 | green |
Code download:
- The code can be found on my GitHub repository.
Printing instructions:
- 0.3 draft profile used
- Textured sheet used
- No supports required
- No brim required
Happy printing =)