The green and the yellow are in our bedroom.
The blue and the red was christmas gifts to our closest friends.
On top left there is a push button for displaying the temperature in 5 seconds.
On the top right there is a PIR-detector for increasing the LED intensity when you are near,
but between 20.00 and 07.00 hours the PIR is deactivated.
On the rear side is a switch for selecting normal time or daylight saving time.
They are powered from a 9 V switched supply and the clock chip has a battery that probably will last five years.
The Arduino board is a Uno althought a Nano would have been sufficient.
