Yes. The measurements are not correct. The wood plank I've used is 1.5cm*30cm*80cm. Sorry for the mistake. By the way, if you can, take a bigger plank with a dimensional ratio of 1:3 (something like 40*120cm) and use as many stripes as possible. The kinetic effect will be much more enjoyable.
DIY CONCRETE:: Clock
RF 315/433 MHz Transmitter-receiver Module and Arduino