as promised here is the video explaining how I soldered my LED’s to create the display in my worldmap clock project.
As stated in the video, the module used is Ws2818B which are individual RGB leds individually controllable .
I bought them by 100 on Banggood for about 15€
I found a lot of useful tips on how to power it and use it properly on Adafruit’s website (which also the provider of the library to control it) Adafruit Uberguide for Neopixel
Here is the final result on my nano version of the Arduino SmartClock
The new clock in font of its older brother
It is a simplified version of the Arduino SmartClock but also smaller.
Like the other model, it is an arduino based clock that connects to my home wifi in order to automatically set up the time (wifi module ESP8266).
It is also an alarm clock, the time of the alarm is also set via WiFi. There is a mode where the alarm is automatically set according to my schedule on Google Agenda and the time forecasted for the journey by Google Maps (by car, because of traffic jams and my variable schedule, this can vary a lot from one day to an other).
Instead of using a light sensor, I set up two simples modes : Day & Night. By day the seconds are shown in a colorful way :
Display by day
By night the luminosity is lower and only some LEDs are used :
Display in night mode
The code is fairly close to the one of the preceding version (reminder : the code of the clock itself is freely available here ). The soldering was more challenging as there not a lot of room available inside of the box.
Inside of the clock
To finish here is little tip :
If you’re building a project inside a box with a power cable (or any type of cable going outside of the box) you can make a knot with the wire inside. That way, if you pull on the cable, it will only tighten the knot and not unplug or break the wire ;-).
The simple knot trick !
After having successfully created a SmartClock with Arduino, I decided to do it again but smaller !
As I want this project to be more colorful, I found an alternative to simple RGB led. The module is called WS2812 and it is simply awesome !
The modules are fairly easy to use and are connected on cascade. You can simply control the color of every LED separetely.
Description of the module : here
One powerful WS2812
For now, I’m using the Arduino Uno for prototyping, but in order to have everything in a small box I’ll use the Arduino Nano Pro.
Here is what it looks like now :
Prototyping using arduino uno
size of the box
LEDs and screen for the display