Alarm_Clock

This is an Alarm Clock (Radio) based on the Arduino Uno in combination with a MAX7219 LED-Matrix, Relay-Board, DS3231 RTC and a standalone Radio/Audio Module.

Note: This Project is under heavy development at the moment.

Wiring

Image how to wire the project will follow.

LED-Matrix:

LED-Matrix	Arduino
VCC	Vin/5V+
GND	GND
DIN	GPIO13 (HSPID)
CS	GPIO 10
CLK	GPIO14 (HSPICLK)

RTC DS3231:

DS3231	Arduino
3,3V	3,3V
GND	GND
SCL	GPIO5
SDA	GPIO4

Relay-Module:

Relay-Module	Arduino	Type
VCC	Vin/5V+	Power
GND	GND	GND
In1	GPIO8	Power
In2	GPIO7	Input
In3	GPIO7	Input
In4	GPIO7	Input

Switch:

The switch should connect the GPIO to ground if it is pressed down:

power_sw: GPIO2
input_sw: GPIO5
alarm_sw: GPIO4
sleep_sw: GPIO3

You can also change this at the beginning of the code:

//Pin Taster
const int pinTime = 2; //Pin fuer Toggle_Power und Einstellen der Uhrzeit (Lang)
const int pinSet = 3; //Pin fuer Sleep und Zeit_Einstellung im Alarm/Time Set Mode
const int pinAlarm = 4; //Pin fuer Alarm An/Aus und setzen der Alarmzeiten (Lang)
const int pinInput = 5; //Pin für die Eingangswahl
const int pinSleep = 6; //Pin Unbenutzt
//Pin Relay
const int outInput = 7;
const int outPower = 8;

How does it work

The Clock can control 2 relays:

Power Relay: is used to turn on/off a AMP, Radio or any other device.
Input Relay: is to switch between two Inputs like Radio for Alarm and CD/MP3 or Aux for normal Music.
If an alarm is triggerd both relays are switched on.

The Clock is controlled with 4 Buttons

Power-Button: turn power relay on/off
Power-Button (long-press): Set clock (Day, Month, Year, Hour, Minute, Second) with Sleep-Button
Input-Button: turn input relay on/off
Alarm-Button: toggle active alarm (Alarm 1 -> Alarm 2 -> Alarm 1 and Alarm 2 -> Alarm off)
Alarm-Button (long-press): set alarm time (Alarm 1 Hour, Alarm 1 Minute, Alarm 2 Hour, Alarm 2 Minute) with Sleep-Button
Sleep-Button : set time to turn power relay off (90 Min -> 60 -> 30 -> 15 -> Off)

Issues

Long-Press blocks display until release.

Dependencies

LedMatrix.h : https://github.com/squix78/MAX7219LedMatrix

DS3231.h : https://github.com/NorthernWidget/DS3231

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