Efficient alarm clock with low electromagnetic radiation, big display and music player
![713](https://cdn.xingosoftware.com/elektor/images/fetch/dpr_1,w_200/https%3A%2F%2Fwww.elektormagazine.com%2Fassets%2Fupload%2Fimg%2Fpublic%2Foriginal%2F1clock.png)
Features: - 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 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 (teens
Updates from the author