Working water leaks detector. Here it is:

 

I had had first working prototype on the week 4 already. So this week I have focused on the aesthetics and producing of more solid body. The last body made of my daughter's modeling clay was too soft.

 

There is a large field of refinements indeed: 

1. If I had a step-up DC-DC converter from 1.5-volt to 5-volt I could use simple and small AA or AAA batteries and this device would be much smaller. I have purchased one  - but from China and I think it will come to me after the end of this course.

Another way to solve this problem is to use 9-volt 6LR61 battery. I'll think about it.

2. Device should work a few years with this batteries but it wold be nice if they will be replaceable.

3. I wanna have even more solid enclosure.

 

 

Paper test before using carton:

Carton:

Aluminium foil:

Producing texture using a power supply module:

Foil   +   double-sided tape  +   ... my daughters modeling clay. However, I can not completely get rid of the clay.

Body is ready: