Differences

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--- led_clock [2016/04/15 10:17] – add release kingkevin
+++ led_clock [2016/08/01 08:39] – add DCF77 module kingkevin
@@ Line 7: / Line 7: @@
 For that you will need:
   * WS2812b RGB LEDs strip (long enough to go around the clock)
-  * development board with a STM32F103 micro-controller and 32.768 kHz oscillator for the Real Time Clock (such as the blue pill)
+  * development board with a STM32F103 micro-controller and 32.768 kHz oscillator for the Real Time Clock (such as the blue pill), or external RTC module (such as the I2C DS1307)
   * coin cell battery to keep the RTC running (optional)
   * GL5528 photo-resistor to adjust the LED brightness (optional)
+  * DCF77 to automatically update the time (recommended)
 More details about the project can be found in the [[https://git.cuvoodoo.info/led_clock/about/|README]].\\
@@ Line 20: / Line 21: @@
 ==== add-on ====
-{{  :led_clock:setup.jpg?300|LED clock add-on}}
+{{  :led_clock:setup-dcf.jpg?300|LED clock add-on}}
 Here is the LED clock add-on:
-  - WS2812b LED strip
   - blue pill development board with STM32F103 micro-controller
-  - USB for power, SWD adapter to flash, USB to UART converter to debug
+  - tiny RTC I2C module with Maxim DS1307 RTC IC (not used in the end)
-  - tiny RTC i2C module with Maxim DS1307 RTC IC
+  - CR2032 coin cell battery (to keep the internal RTC running)
+  - DCF77 receiver module (salvaged from a radio clock)
+  - USB to power board and LEDs
+  - ST-Link V2 (clone) to program the micro-controller
+  - USB to UART converter to set time and debug
+  - WS2812b LED strip
   - GL5528 photo-resistor
-  - CR2032 coin cell battery
 ==== clock integration ====