The clock is using a housing from TEKO (D14).
3D-printed parts are used to fix the speaker, and to hold the display. Another part is hiding the metallic parts on the back. A distance holder and caps for the rotary encoders are other 3d-printed parts.
Features of the diy clock:
- capacitive power supply to reduce electric smog
- big and efficient 1.2" 4-digit 7-segment display (I2C)
- Teensy 3.1 board with 12 Bit DAC (SD-card wav player) and internal Real Time Clock (RTC)
- efficient I2C class D amplifier (89% efficient with 8Ω speaker at 1.5 Watt)
- DCF77 receiver
- two rotary Encoder with switch for easy and intuitive control
- state machine programmed with arduino (teensyduino) for easy changments in the software
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