You can wire most of these connectors directly to your PCB or perfboard but I prefer to use standard 100mil (2.54mm) pitch header connectors with heat shrink tubing on my wiring to attach to pins on the board as this makes any changes or fixes easier. I used 1uF on the input and output capacitors for the LM7805 and another 10uF on the 5V rail to support the LEDs. The display and RTC module are wired to 5V, GND and the respective SDA, SCL pins of the Arduino.
Also don't forget to wire power to the LED in the top push button (mine didn't need a current limiting resistor). The rotary encoder button and top push button are wired to GND and the respective digital input pin (these will use the internal pin pullups). Rotary encoder wiring needs to be wired to GND and the two interrupt pins (2 and 3) of the Arduino. Potentiometer has one end to GND the other to 5V and the middle to your analog input pin. Mostly its just wiring the modules, switches and LEDs to the Arduino. If you don't want to do a PCB you can just use perf board or wire directly to an Arduino UNO.
#Momentary switch diptrace software#
I made this using DipTrace Schematic and PCB Design Software and I've also included the DipTrace file if you are interested. You could use whatever else you like as an LED diffuser. I used a 3D printed plastic shroud to support the rods, which I touch on later. The LEDs diffuse through the acrylic bubble rods mounted in the top of the box. These are great and I like to use them in many projects as they are easily programmed to produce cool effects and can get fairly bright. The LEDs used are the 8x WS2812B digitally addressable LEDs.
#Momentary switch diptrace full#
At about full brightness the whole device was drawing about ~450mA.Įverything fits into a Basswood trunk box that you can stain for a more finished look. Mine was rated at 0.75A at 9V and I likely wouldn't want to go any lower as the WS2812B LEDs can draw quite a bit at max brightness. A LM7805 was used to drop this to 5V for the electronics. I used a 9V power supply adapter with a 5.5mm x 2.5mm jack to the board. You could use the button on the secondary rotary encoder if you add it. I got a nicer metal button with LED in it but any button will do. A momentary push button is used to turn on the LEDs. In retrospec using another rotary encoder would've made interfacing a bit easier and I could've added more functionality but it gets a bit more complicated handling the two rotary encoders using the Arduino interrupts (haven't really dove into adding two rotary encoders so not entirely sure how difficult it is). The potentiometer is used to vary the 7 segment clock display brightness. User input to the device is achieved by a rotary encoder with tactile push button which is used to configure the clock time and alarm as well as the LED modes and brightness. The RTC module and 7 segment clock display interface to the Arduino via I2C protocol. This provides reliable time keeping and has a small battery that enables it to maintain time if the entire alarm clock is powered off. The key element of the clock is the RTC module. The schematic of the build is included below. This build is based around a bare bones Arduino UNO with Real Time Clock (RTC) module and 7 segment LED clock. However for this build we are just used RGB LEDs which can roughly approximate a sunlight feel but also allow for cool and unique color combinations and effects. Many of the sunrise clocks you can purchase attempt to simulate sunlight with specials bulbs that try to match the hue and color temperature of the morning sun.
This might not be the case for everyone but personally I've found it to be helpful and particularly find the warm colors comforting in the morning. The idea is that this appeals to our natural inclination to wake up with the sun and 'tricks' the body into a balanced circadian rhythm making getting up easier. Sunrise alarms are designed to provide a more calming wake experience by slowly increasing in brightness around your set wake time. Trouble getting up in the morning? Hate the harsh piercing sound of an alarm? Would you rather make something on your own that you could arguably buy for less money and time? Then check out this LED Sunrise Alarm Clock!
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