https://github.com/tfg13/ringcube

21st century standalone alarm clock
https://github.com/tfg13/ringcube

Last synced: about 5 hours ago
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21st century standalone alarm clock

• Host: GitHub
• URL: https://github.com/tfg13/ringcube
• Owner: tfg13
• License: cc-by-4.0
• Created: 2014-07-23T14:27:39.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2015-11-08T21:13:46.000Z (about 9 years ago)
• Last Synced: 2023-03-11T19:02:56.249Z (over 1 year ago)
• Language: C++
• Homepage:
• Size: 11.8 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE_case_circuit

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README

        
# ringcube

While everybody seems to use a smartphone to get up in the morning, I still prefer a dedicated alarm clock.

Since no available alarm clock matched all my requirements, I decided to build my own.

Requirements:

* Solar powered

* Long standby time (in the dark)

* Play music from SD card

* Dedicated "+8h" quickset alarm time button

* Warn before the battery runs out (the old one failed to do this)

* Radio controlled

The final clock is a 6cm cube (hence the name) full of batteries, circuitry and cables:

* Arduino-compatible ATmega328 @ 8 MHz

* DS3231 Real-Time Clock with a 3V lithium backup battery (>9 years runtime, temperature compensated = super precise!)

* DCF77 receiver with antenna that should be able to receive a time signal in all of Europe

* TPA2016 2.8W audio amplifier (+ speaker)

* 0.3 W solar cell

* 3 * 1.2V AAA battery (months of standby in the dark)

* Micro SD card socket

* 7-segment leds, buttons

This repo contains the design of the 3D-printed case, the circuit diagram and the software running the clock.

Several additional arduino libraries are required to compile the software:

* https://github.com/tfg13/DS3231 (to control the RTC)

* https://github.com/tfg13/TMRpcm (to play music from the sd card)

* https://github.com/adafruit/Adafruit-TPA2016-Library (to control the amplifier)

* https://github.com/greiman/SdFat (to access the sd card (official sd library cannot handle re-opening the card after sleep))

License:

* My code: Apache 2.0 (see LICENSE_code)

* Design for case, circuit: CC4 (see LICENSE_case_circuit)

(c) 2014-2015 Tobias Fleig - All Rights Reserved